SwePub - search: L773:0921 3449 OR L773:1879 06...

Enumeration	Reference	Cover	Find
1.	Berglund, Christer, et al. (author) A note on inter-country differences in waste paper recovery and utilization 2002 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 34:3, s. 175-191 Journal article (peer-reviewed)abstract Countries worldwide express waste paper recycling targets in terms of recovery and utilization rates. The main purpose of this paper is to identify and analyze the most important determinants of inter-country differences in these waste paper rates. By employing two regression models and using data for 89 and 81 countries, respectively, the paper concludes that relative waste paper recovery and use are largely market-determined, and depend thus on long-standing economic factors such as population intensity and competitiveness in the world market for paper and board products. We also find evidence that supports the conjecture that rich countries tend to recover relatively more waste paper than is the case in low-income countries, reflecting the higher demand for waste management and environmental policies in more developed economies. As recovery and utilization rates are determined largely by long-standing economic and demographic characteristics the degree of policy flexibility in affecting these rates may be limited. In particular, an ambitious utilization rate target may be very costly to enforce as it can conflict with existing trade patterns of paper and board products as well as with other environmental goals. Additional policy targets may, therefore, be desirable, especially since paper recycling is motivated primarily by environmental concerns and seldom is a benign activity in itself.
2.	Dalemo, Magnus, et al. (author) Effects of including nitrogen emissions from soil in environmental systems analysis of waste management strategies 1998 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 24, s. 363-381 Journal article (peer-reviewed)abstract The environmental impacts of nitrogen emissions from soil resulting from the use of organic fertilizers, such as manure, are large compared with the corresponding impacts of mineral fertilizers. However, soil emissions are rarely included in systems analysis of waste management strategies. This study examines whether the inclusion of soil emissions can affect the environmental ranking of systems for managing solid biodegradable waste. Waste management scenarios based on incineration, anaerobic digestion and composting, respectively, were compared. The scenarios were analysed using the organic waste research (ORWARE) simulation model. A simplified model for calculating nitrogen availability and emissions was also constructed. Life-cycle analysis methodology was used for choosing system boundaries and evaluating the results. Global warming, acidification and eutrophication were the impact categories considered. The results indicate the vital importance of considering nitrogen emissions from soil when comparing biological waste management systems with other waste management methods, especially with regard to eutrophication effects. Soil emissions are also important when comparing the environmental impacts of anaerobic digestion and composting systems. However, the variation in nitrogen emissions from soil is large and depends on the spreading technique used, climate, drainage and soil texture
3.	Dalemo, M., et al. (author) ORWARE – A simulation model for organic waste handling systems. : Part 1: Model description 1997 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 21:1, s. 17-37 Journal article (peer-reviewed)abstract A simulation model, ORWARE (ORganic WAste REsearch), for the handling of organic waste in urban areas has been constructed. The model provides a comprehensive view of the environmental effects, plant nutrient utilisation and energy turnover for this large and complex system. The ORWARE model consists of several sub-models; sewage plant, incineration, landfill, compost, anaerobic digestion, truck transport, transport by sewers, residue transport and spreading of residues on arable land. The model is intended for simulating different scenarios, and the results are: emissions to air and water, energy turnover and the amount of residues returned to arable land. All results are presented, both as the gross figure for the entire system and figures for each process. Throughout the model all physical flows are described by the same variable vector, consisting of 43 substances. This extensive vector facilitates a thorough analysis of the results, but involves some difficulties in acquiring relevant data. In this paper, the model is described. Results from a hypothetical case study are presented in a companion paper.
4.	Eriksson, Ola, et al. (author) ORWARE : a simulation tool for waste management 2002 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 36:4, s. 287-307 Journal article (peer-reviewed)abstract A simulation model, ORWARE (ORganic WAste REsearch) is described. The model is mainly used as a tool for researchers in environmental systems analysis of waste management. It is a computer-based model for calculation of substance flows, environmental impacts, and costs of waste management. The model covers, despite the name, both organic and inorganic fractions in municipal waste. The model consists of a number of separate submodels, which describes a process in a real waste management system. The submodels may be combined to design a complete waste management system. Based on principles from life cycle assessment the model also comprises compensatory processes for conventional production of e.g. electricity, district heating and fertiliser. The compensatory system is included in order to fulfil the functional units, i.e. benefits from the waste management that are kept constant in the evaluation of different scenarios. ORWARE generates data on emissions, which are aggregated into different environmental impact categories, e.g. the greenhouse effect, acidification and eutrophication. Throughout the model all physical flows are described by the same variable vector, consisting of up to 50 substances. The extensive vector facilitates a thorough analysis of the results, but involves some difficulties in acquiring relevant data. Scientists have used ORWARE for 8 years in different case studies for model testing and practical application in the society. The aims have e.g. been to evaluate waste management plans and to optimise energy recovery from waste.
5.	Klang, Anders, et al. (author) Sustainable management of demolition waste : an integrated model for the evaluation of environmental, economic and social aspect 2003 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 38:4, s. 317-334 Journal article (peer-reviewed)abstract A model is presented for evaluating waste management systems for their contribution to a sustainable development, including environmental, economic and social aspects. The model was tested in a case-study, where groups of long term unemployed people were offered both education on environmental issues and practical work with the recovery and recycling of building and demolition waste as a form of vocational development. Application of the suggested model revealed the overall effects on sustainability of different methods of waste management. In addition, negative aspects of the systems analysed were identified, which led to discussions about possible improved practices within the waste management systems. Two of the waste management systems investigated (the recycling of steel and re-use of sanitary porcelain) showed a potential contribution to sustainable development in all of the aspects studied. Preparing bricks for re-use showed the largest potential for eco-efficiency, but had negative effects on sustainability from the social perspective of health and the working environment. The possibility of further use of the model and the remaining obstacles to such analyses are discussed. One observation is that the data collection needed to perform this kind of sustainability analysis is resource-demanding, and that it would therefore be better to identify a smaller number of key indicators.
6.	Lundmark, Robert (author) Choice of location for investments in the European paper industry: the impact of wastepaper 2001 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 33:3, s. 167-180 Journal article (peer-reviewed)abstract This paper identifies and estimates the relative impact that factor input prices, output market size and agglomeration effects have on the choice of location for investment projects in the European pulp and paper industry, with special focus on the price of waste paper A conditional logit model was developed to fit investment projects across 16 European countries for the period 1985-95. The results suggest that factor input prices, in general, and the price for waste paper in particular, are neither a statistical nor an economic significant location determinant for a paper manufacturer. Furthermore, the results suggest that market size and agglomeration effects are considered more important than the price of raw material when an investment site is chosen.
7.	Menad, Nourreddine (author) Cathode ray tube recycling 1999 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 26:3-4, s. 143-154 Journal article (peer-reviewed)abstract Lead and polybrominated flame retardants are the two hazardous materials that can be found in electronic appliances. Particularly, cathode ray tubes (CRT) contain leaded glasses. In a computer monitor, over 98% of the lead is in the CRT. This material is generally not accepted for reuse as a component; only those from televisions can be reused. However, this currently represents only a very small market. Envirocycle (a US company) has developed a process to recycle all glasses contained in CRTs; this process includes cleaning and sorting glass. The product obtained is used for the manufacture of new CRT glass. Some industries have used pulverized glass from CRTs in smelting processes as slagging material instead of sand or slag. In this paper, some environmental issues related to the recycling of computers and television sets, and CRTs from computers are presented and discussed. Different processes used to recycle CRTs are described along with an economic analysis.
8.	Menad, Nourreddine, et al. (author) Combustion of plastics contained in electric and electronic scrap 1998 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 24:1, s. 65-85 Journal article (peer-reviewed)abstract Plastic materials have been associated with electric and electronic applications since the early days of the electrical industry. Plastics can amount up to 30% of the scrap mass. Generally, they contains flame retardants such as halogenated compounds which can lead to the formation of different toxic products. Recycling, incineration and landfilling are the current methods used to treat these plastics. They also can be used as combustibles in some metallurgical processes. However, during their combustion, halogenated flame retardants can produce dibenzop-dioxins and dibenzo-furans.
9.	Menad, Nourreddine, et al. (author) Polyvinyl chloride used as a chlorinating and a reducing agent 1998 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 24:3-4, s. 257-274 Journal article (peer-reviewed)abstract Polyvinyl chloride (PVC) or vinyl is a recyclable material. It can be used as a chlorinating and a reducing agent. Two tests of chlorination and reduction of two different samples of jarosite and hematite were realized using PVC, results are presented in this paper. The chlorination test shows that the HCl gas produced from PVC and heated at ≈250°C can be used as a chlorine source to recover as chlorinated compounds the valuable metals such as Zn, Pb contained in jarosite. The XRD reveals the presence of lead and zinc chlorides in the condensates obtained. The second test of reduction was conducted using a mixture of PVC and hematite treated in a nitrogen atmosphere between 200 and 1000°C. The results show that at low temperature, PVC produces HCl and with kinetic consideration, no reactions can be observed with hematite. However, at high temperature, the weight of the hematite sample decreases by ≈15%, due to the reduction of hematite to iron metal.
10.	Menad, Nourreddine, et al. (author) Thermal treatments of industrial wastes in controlled atmospheres for the elimination of As, Hg, Cd, Se and the concentration of Pb, Cu and Zn 1999 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 25:3-4, s. 233-254 Journal article (peer-reviewed)abstract Thermal treatments of five different types of non-ferrous metallurgical wastes, under a controlled atmosphere, were carried out at temperatures lower than 800°C for the separation of their toxic compounds and the concentration of valuable metals in the treatments residues. The best results were obtained by the treatments in air or hydrogen, or both successively. Simple treatments, using air or hydrogen, of three samples allowed the elimination of more than 95% of their toxic elements and almost doubled their valuable metals concentration. For the rest of the samples, a combined treatment was necessary for their efficient decontamination. In this case, the valuable metals content in the treatment's residue was increased to a reasonable value. Most of the solids issuing from these treatments can be recycled in current non-ferrous metallurgical processes.
11.	Shen, H, et al. (author) A review of plastics waste recycling and the flotation of plastics 1999 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 25, s. 85-109 Journal article (peer-reviewed)abstract This paper summerizes the importance of plastic waste recycling and plastic waste separation. Based on an analysis of the physical and chemical characteristics of plastics and plastic waste, the potentials and limitations of several technological processes are discussed. In addition, a review of the surface chemical aspects of plastic flotation is presented. It can be concluded that the flotation of plasics is a fairly flexible technique and could prove to be a useful process for the separation of mixtures of several different types of plastics. however, more research and development effort is required before this technology can be introduced to industry.
12.	Shen, Huiting, et al. (author) Physicochemical and mineralogical properties of stainless steel slags oriented to metal recovery 2004 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 40:3, s. 245-271 Journal article (peer-reviewed)abstract In the present paper, physicochemical and mineralogical properties of stainless steel slags oriented to metal recovery were studied by using various methods. The tests were conducted on two types of slag, namely EAF slag (Electric Arc Furnace) and AOD slag (Argon Oxygen Decarburisation). The samples were collected from the tailings of a slag processing plant operated by Bergslagens Stålservice AB in Sweden. Chemical analysis showed that the EAF and AOD samples contain 3.22% Cr and 0.075% Ni, and 1.71% Cr and 0.20% Ni respectively. Fe and Cr are mainly (about 70%) in the form of oxide while Ni is in the form of metal. Particle size analysis demonstrated that the EAF and AOD had been finely ground at the plant with 56 and 65% (−75 μm), respectively, containing a large amount of slime. According to X-ray Diffraction, Scanning Electron Microscope (SEM) and other studies, the main phases identified in EAF and AOD include Fe–Cr–Ni alloys, Fe–Cr oxides, Ca–Mg–Al silicates and Ca–Mg oxides (free CaO and periclase) with many mineral species. From SEM, Fe, Cr and Ni exist in the liberated alloy particles, association particles and complex particles. It is possible to recover the former two but the Fe–Cr–Ni in the latter one will not be easy to recover by mechanical separation. Some Cr also exists in the silicate phases and this Cr is impossible to recover by mechanical separation. However, Ni seldom exists in the silicate phases. Dissolution test showed that only a very small amount of EAF or AOD is dissolved in water, but in 1 M HCl solution, as high as 23.68% EAF and 31.04% AOD are dissolved, respectively. In addition, a phenomenon of particle size growth of the ground AOD was found and demonstrated by particle size analysis with a laser particle size analyzer and a Cyclosizer. Particle size growth of the ground EAF is not obvious, indicating that the hydraulic property of AOD is higher than EAF.
13.	Shen, H, et al. (author) Selective flotation separation of plastics by chemical conditioning with methyl cellulose 2002 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 35, s. 229-241 Journal article (peer-reviewed)abstract The floatability of seven plastics (POM, PVC, PET, PMMA, PC, PS and ABS) in the presence of methyl cellulose (MC) and separation of plastics mixtures were investigated in this paper. It was found that the seven plastics can be separated into three groups by using the wetting agent MC. Group one includes POM and PVC. They are depressed at very low MC concentrations. Group two, including PET, PMMA and PC, has an intermediate floatability. Group three (ABS and PS) has a high floatability. They are almost not depressed within the given MC concentration range. In order to understand the mechanism of selective flotation of plastics and the chemical conditioning process, surface chemical factors, such as wettability of plastics and surface tension of flotation medium, and gravity factors, such as particle density and shape, were studied. It was found that the depressing effect of MC on plastics is ascribed mainly to its adsorption on the plastics surfaces. The MC molecules absorbed on plastics expose some of their polar groups oriented towards the aqueous phase, hence making the plastics surfaces hydrophilic. In addition, flotation selectivity for the plastics is dominated not only by wettability of plastics, but also by particle size, density and shape
14.	Shen, Huiting, et al. (author) Selective flotation separation of plastics by particle control 2001 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 33:1, s. 37-50 Journal article (peer-reviewed)abstract A study on the control of particle size distribution (PSD) of the ground carbonate product in stirred media mills (wet Drais stirred bead mill and dry Sala Agitated Mill) is presented in this paper. The results indicated that the slope of product size distribution can be controlled by altering some operating parameters, such as size of grinding media and tip or peripheral speed. The profile of product size distribution from the stirred media mills was found to follow most closely the Rosin-Rammler-Bennett (RRB) model.
15.	Sonesson, U., et al. (author) Environmental and economic analysis of management systems for biodegradable waste 2000 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 28:02-jan, s. 29-53 Journal article (peer-reviewed)abstract The management system for solid and liquid organic waste affects the environment and surrounding technical systems in several ways. In order to decrease the environmental impact and resource use, biological waste treatment and alternative solutions for sewage treatment are often advocated. These alternatives include increased agricultural use of waste residuals. To analyse whether such proposed systems indicate improvements for the environment and its sustainability, systems analysis is a useful method The changes in environmental impact and resource use is not only a result of changes in waste treatment methods, but also largely a result of changes in surrounding systems (energy and agriculture) caused by changes in waste management practices. In order to perform a systems analysis, a substance-flow simulation model, the organic waste research model (ORWARE), has been used. The results are evaluated by using methodology from life cycle assessment (LCA). An economic analysis was also performed on three of the studied scenarios. The management system for solid organic waste and sewage in the municipality of Uppsala, Sweden, was studied. Three scenarios for different treatments of solid waste were analysed: incineration with heat recovery, composting, and anaerobic digestion. These three scenarios included conventional sewage treatment. A fourth scenario reviewed was anaerobic digestion of solid waste, using urine-separating toilets and separate handling of the urine fraction. The results are only valid for the case study and under the assumptions made. In this case study anaerobic digestion result in the lowest environmental impact of all the solid waste management systems, but is costly. Economically, incineration with heat recovery is the cheapest way to treat solid waste. Composting gives environmental advantages compared to incineration methods, without significantly increased costs. Urine separation, which may be implemented together with any solid waste treatment, has great advantages, particularly in its low impact on the environment. However, there is a large increase in acidification.
16.	Sonesson, Ulf, et al. (author) ORWARE - A simulation model for organic waste handling systems. Part 2 : Case study and simulation results 1997 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 21:1, s. 39-54 Journal article (peer-reviewed)
17.	Zhang, Shunli, et al. (author) Aluminum recovery from electronic scrap by High-Force R eddy-current separators 1998 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 23:4, s. 225-241 Journal article (peer-reviewed)abstract The amount of electronic scrap which contains a substantial portion of non-ferrous metals, primarily copper and aluminum, has been growing. The present study is directed toward aluminum recovery by a newly developed eddy current separator. The investigation on shredded personal computer and printed circuit board scrap demonstrates that the High-Force® eddy-current separator will be applicable for this purpose. It has been shown that, by a single pass of the materials on the High-Force® eddy-current separator, an aluminum concentrate out of personal computer scrap can be obtained with a purity of 85%, while maintaining a recovery in excess of 90%, with the feed rate being up to 0.3 kg/min.
18.	Zhang, Shunli, et al. (author) Mechanical separation-oriented characterization of electronic scrap 1997 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 21:4, s. 247-269 Journal article (peer-reviewed)abstract The ever-increasing amount of electronic scrap and the steadily-decreasing contents of the precious metals used in electronics, as well as the ever-growing environmental awareness, challenges such conventional precious-metal-oriented recycling techniques as pyrometallurgy. Separation and beneficiation of various materials encountered in electronic scrap might provide a correct solution ahead. In this context, mechanical separation-oriented characterization of electronic scrap was conducted in an attempt to evaluate the amenability of mechanical separation processes. Liberation degrees of various metals from the non-metals, which are crucial for mechanical separation, were analyzed by means of a grain counting approach. It is found that the metallic particles below 2 mm achieve almost complete liberation. Particle shapes were also quantified through an image processing system. The results obtained show that the shapes of the particles, as a result of shredding, turn out to be heterogeneous, thereby complicating mechanical separation processes. In addition, separability of various materials was ascertained by a sink–float analysis. It has been shown that density-based separation techniques shall be viable in separating metals from plastics, light plastics (ABS, PS and PVC, etc.) from glass fiber reinforced resins and aluminum from heavy metals. Specifically, a high quality copper concentrate can be expected by density-based separation techniques. Moreover, FT-IR spectra of plastics pieces from the light fractions after the sink–float testing show that PC scrap primarily contains ABS, PS and PVC plastics with the density range of +1.0–1.5 g/cm3, whereas PCB scrap mainly contains glass fiber reinforced epoxy resins plastics with the density range of +1.5–2.0 g/cm3.
19.	Zhang, Shunli, et al. (author) Optimization of electrodynamic separation for metals recovery from electronic scrap 1998 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 22:3-4, s. 143-162 Journal article (peer-reviewed)abstract The performance of an electrodynamic separator has been optimized in the present study for metals recovery from electronic scrap. Eight variables involved in the system was investigated by a 2IV8-4 fractional factorial design in an attempt to determine the significant variables. The effects of those variables were detailed with glass, polyvinyl chloride (PVC) as a representative of plastics, copper wires, copper and aluminum granulates. For various binary mixtures of copper wires and glass or PVC plastic, the electrodynamic separator is able to produce copper products with the grade ranging from 93 to 99%, and recovery from 95 to 99%, respectively, under the optimized conditions. Further, one sample which is a middling fraction resulting from air table separation was also tested. For a single pass, copper and aluminum was upgraded approximately from 11 and 7% to 34 and 22%, while maintaining the corresponding recovery of 87 and 99%, respectively.
20.	Zhang, Shunli, et al. (author) Particle trajectory simulation of two-drum eddy current separators 1999 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 26:2, s. 71-90 Journal article (peer-reviewed)abstract Particle trajectories of the newly-developed two-drum eddy current separators are simulated by the ECSIM software package. The simulation results have been substantiated by measuring the horizontal displacements of the particles to be investigated under the same conditions. It is shown that the simulation results are in good agreement with the experimental ones. Further, on the basis of the simulation results obtained, the potential for improving the design of two-drum eddy current separators is discussed. It appears that the performance of two-drum eddy current separators, when processing small particles, may be enhanced by strengthening the magnetic field intensity and simultaneously increasing the maximum drum speed.
21.	Zhang, Shunli, et al. (author) Separation mechanisms and criteria of a rotating eddy-current separator operation 1999 In: Resources, Conservation and Recycling. - 0921-3449 .- 1879-0658. ; 25:3, s. 215-232 Journal article (peer-reviewed)abstract Much work has so far been done for modelling the magnetic deflecting (repulsive) force of eddy current separators. However, selective separation of various materials by eddy current separation depends not only on magnetic deflecting forces but also on competing forces like the gravitational force and the centrifugal force. Co-acting forces on a particle leaving the external drum are analyzed and evaluated in this study. Separation mechanisms of metal/non-metal and metal/metal separation systems have been investigated by a newly-developed High-Force® eddy-current separator. Further, a separation model governing an effective separation among various materials is presented. Based on this separation model, four practical separation criteria for metal/metal separation systems are put forward and have been substantiated experimentally.
22.	Arekrans, Johan, et al. (author) Barriers to access-based consumption in the circular transition : A systematic review 2022 In: Resources, Conservation and Recycling. - : Elsevier BV. - 0921-3449 .- 1879-0658. ; 184 Journal article (peer-reviewed)abstract Barriers to access-based consumption (ABC) have been extensively studied in different strands of literature. However, cumulative knowledge is not organized to date, and a comprehensive overview of barriers identified by empirical studies in diverse strands is lacking. Such a picture is essential for laying the ground for further change-oriented research and actual changes in practice. This article reports on the results of a systematic review on barriers to transitioning from ownership- to access-based consumption. The review focuses on the literature strands product-service systems, circular economy, sharing economy, and collaborative consumption. Through open and axial coding of 289 barriers reported in 45 empirical studies, we found 17 themes of barriers concerning consumers, business, and society. The analysis of the barriers reveals four significant insights important for the research and practitioner community:the overall experience of ABC and trust mechanisms need to be better understood;organizational aspects in traditional business need a system change;regulation plays a fundamental role in making ABC work for business, society, and sustainability; andsharing risks and experimentation for new learnings are necessary.These four major insights suggest that consumers need business and government to offer enabling conditions for ABC – spanning from raising awareness and understanding to improving user experience. Furthermore, businesses need governments to create the necessary structures to support ABC offerings – from decreasing risks to increasing incentives. How and which mechanisms can further facilitate circular behaviors is a salient topic for future investigations.
23.	Abdullah Asif, Farazee Mohammad, et al. (author) System dynamics models for decision making in product multiple lifecycles 2015 In: Resources, Conservation and Recycling. - : Elsevier BV. - 0921-3449 .- 1879-0658. ; 101, s. 20-33 Journal article (peer-reviewed)abstract The main drivers for adopting product multiple lifecycles are to gain ecological and economic advantages. However, in most of the cases it is not straight forward to estimate the potential ecological and economic gain that may result from adopting product multiple lifecycles. Even though many researchers have concluded that product multiple lifecycles result in gain, there are examples which indicate that the gain is often marginal or even none in many cases. The purpose of this research is to develop system dynamics models that can assist decision makers in assessing and analysing the potential gain of product multiple lifecycles considering the dynamics of material scarcity. The foundation of the research presented in this paper is laid based on literature review. System dynamics principles have been used for modelling and simulations have been done on Stella iThink platform. The data used in the models have been extracted from different reports published by World Steel Association and U.S. Geological Survey. Some of the data have been assumed based on expert estimation. The data on iron ore reserves, iron and steel productions and consumptions have been used in the models. This research presents the first system dynamics model for decision making in product multiple lifecycles which takes into consideration the dynamics of material scarcity. Physical unavailability and price of material are the two main factors that would drive product multiple lifecycles approach and more sustainable decisions can be made if it is done by taking holistic system approach over longer time horizon. For an enterprise it is perhaps not attractive to conserve a particular type of material through product multiple lifecycles approach which is naturally abundant but extremely important if the material becomes critical. An enterprise could through engineering, proper business model and marketing may increase the share of multiple lifecycle products which eventually would help the enterprise to reduce its dependency on critical materials.
24.	Abu Hatab, Assem, et al. (author) An extended integrative model of behavioural prediction for examining households’ food waste behaviour in Addis Ababa, Ethiopia 2022 In: Resources, Conservation and Recycling. - : Elsevier. - 0921-3449 .- 1879-0658. ; 179 Journal article (peer-reviewed)abstract In developing countries, urbanization and demographic changes are increasing food waste generation at household levels. However, it remains unclear how behavioural and personal characteristics influence the behaviours of urban consumers in developing countries regarding food waste. In this study, we extended the integrative model of behavioural prediction to examine the determinants of food waste behaviour amongst a sample of 698 urban dwellers in Addis Ababa, Ethiopia. The empirical results revealed that attitudes and perceived behavioural control were the most important predictors of intention toward food waste reduction. With regard to food waste behaviours, the results showed that the more an individual feels obliged to discard less food, the higher the odds that the quantity of food that gets wasted by the household would be reduced. Likewise, knowledge about the negative impacts of wasting food and an ability to interpret information on labels of food products were associated with decreased quantities of household food waste. In addition, lower psychological distance to food waste was generally associated with lower quantities of wasted food. Finally, sociodemographic characteristics and food-shopping routines were found to be significant predictors of food waste behaviours. Overall, these findings constitute an entry point for more research and policy measures in order to understand determinants of household food waste behaviours in developing countries and to design effective interventions to reinforce their behaviours towards more sustainable food consumption patterns.
25.	Aid, Graham, 1980-, et al. (author) Expanding roles for the Swedish waste management sector in interorganizational resource management 2017 In: Resources, Conservation and Recycling. - : Elsevier BV. - 0921-3449 .- 1879-0658. ; 124, s. 85-97 Journal article (peer-reviewed)abstract Several waste management (WM) professionals see an ongoing shift in the focus of the industry, from that of atransport and treatment sector to that of a more integrated sustainable service provision and material productionsector. To further develop such transitional ambitions, WM organizations are increasingly looking toward interorganizationalresource network concepts (such as the circular economy and industrial symbiosis) as models ofhow they would like to create new value together with their customers and partners.This article aims to take a step in addressing uncertainties behind such transitions by analyzing barriers forinter-organizational resource management and in turn uncovering some potential opportunities and risks ofnovel offerings from the WM sector. Obstacles for developing innovative inter-organizational resource networkshave been identified based on studies of implementing industrial symbiosis networks. Subsequently, managingexecutives from Swedish private and public WM organizations were interviewed regarding the sector’s capacityto overcome such barriers – opportunities and risks of providing new resource management services – and howtheir organizations might approach the role of actively facilitating more resource efficient regions.Eco-Industrial park management and contracting out holistic resource management are some areas in whichthe respondents see WM organizations offering new services. In relation to such approaches, various risks (e.g.being cut out of investment benefits, or unstable supply) and opportunities (e.g. new markets and enhancedsustainability profiles) were identified. Additionally, it was seen that WM companies would need to makesubstantial changes to their business approach, becoming less dependent on flows of mixed materials forexample, if they are to become even more central value chain actors. To strengthen such approaches, it was seenthat the sector will need to find methods to strategically build strong, long term partnerships, expand upon andtake advantage of available knowledge resources (i.e. best practice technologies and regional material flows),and explore new business models (i.e. stockpiling, park management, or waste minimization). Additionally,working with sector representatives to argue for a more balanced market conditions next to primary productionshould assist the viability of new offerings in the wider market.

Skapa referenser, mejla, bekava och länka

Permalink

Träfflista för sökning "L773:0921 3449 OR L773:1879 0658 "

Refine your search

Year