| 41. |
- Iraguha, Gasore, et al.
(author)
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Using an integrated planning guide for the selection and design of a multi-process strategy for bioremediation of toxaphene and heavy metal contaminated soil in a tropical region
- 2016
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In: Proceedings of the Linnaeus Eco-Tech Conference on Natural Sciences and Technologies for Waste and Wastewater Treatment, Remediation, Emissions related to Climate, Environmental, and Economic Effects.. - : Linnaeus University. - 9789188357410
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Conference paper (other academic/artistic)abstract
- The application of pesticides and inappropriate soil management during intensive cotton farming in Chinandega, Nicaragua has left the soil with high residues of toxaphene and potentially several toxic metalloids and heavy metals from the overuse of mineral fertilizers. Most effective remediation approaches are relatively expensive and use technologies that are energy-intensive and hence not applicable in regions with low economic incentives for remediation. The selection of appropriate and low-cost approaches for soil remediation requires a structured and systematic process to ensure reliable outcomes with low environmental impact. The ideal situation is if such projects could contribute to a sustainable development in the region where the remediation is taking place. An Integrated Planning Guide which includes the key concepts of Ecological Engineering within the Framework for Strategic Sustainable Development was used in the identification and design of some applicable and efficient approaches for the clean-up of soil in Chinandega. This resulted in the design of a multi-process bioremediation strategy that meets the sustainability criteria of the Integrated Planning Guide and that has the potential to degrade toxaphene and remediate heavy metals and metalloids in the soil using Jatropha curcas L. for phytoremediation in combination with Bio-augmentation, biochar as a soil amendment, and the use of biochar and alginate as carriers of toxaphene degrading inocula.
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| 42. |
- Johansson, Björn, 1975, et al.
(author)
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Sustainable Production by Integrating Business Models of Manufacturing and Recycling Industries
- 2011
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In: Proceedings of the 18th CIRP International Conference on Life Cycle Engineering. - 3642196918 ; , s. 723-
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Conference paper (peer-reviewed)abstract
- Future raw material shortage, high price levels and environmental regulations requires increased reuse of materials andcomponents. This will substantially influence conditions for both manufacturing and recycling industries, which need toinnovate their business models. Our hypothesis is that an integrated co-operation between organizations within these industries, employing symbiotic business models will increase the profitability and reduce the total environmental impact. Findings from interaction with manufacturing and recycling industries using a business model framework as baseline are presented. Results indicate that profit and decreased environmental effects can be achieved through symbiotic business models, but further development and implementation is needed.
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| 43. |
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| 44. |
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| 45. |
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| 46. |
- Jonsson, Anders, et al.
(author)
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Ecological engineering to improve the sustainability of soil remediation inremote locations and developing countries
- 2013
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Conference paper (other academic/artistic)abstract
- Toxic compounds from industrial activities accumulate in the ecosystems at an unsustainable rate. Ecological engineering has been proposed as a tool to design ecosystems that integrate human society with its natural environment for the benefit of the both. Bioremediation is generally considered an ecological engineering practice but even if it addresses one of the core goals of ecological engineering, i.e. restoration of damaged ecosystems, bioremediation can be energy-intensive and have low reliance on self-design, particularly if excavation and ex situ methods are employed.From a thermodynamic point of view, most organic pollutants are composed of molecules with high embodied energies and free energy potential that are appealing features for the use of ecological engineering, especially in locations where economic incentives are small for any kind of remediation to be performed,Based on positive experiences from an ongoing research project in Nicaragua, in which by-products and waste material are used as primary feedstock, it is concluded that the principles of ecological engineering can be useful to make in situ bioremediation a more sustainable practice in remote locations and developing countries.
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| 47. |
- Jonsson, Anders, et al.
(author)
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Modelling of E.coli transport in river waters as a means to investigaterelationships between settlements within the riparian zone and faecal pollutionof water bodies
- 2013
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Conference paper (other academic/artistic)abstract
- The naturally oligotrophic rivers of northern Sweden are generally characterized by a low pollution level and high hygienic quality. E.coli, an indicator of fresh faecal contamination, shows however increasing trends and two recent outbreaks of the Cryptosporidium parasite in city drinking water supplies has caused much concern about drinking water security and ecological status of water bodies. There is also an increasing demand for scenic plots of land close to rivers and lakes for both permanent dwellings and holiday cottages and there is a need for better understanding of relationships between settlements within the riparian zone and river water quality. Measurements of E.coli are made at fixed sampling points along the river. A transport model for E.coli in river water was developed based on literature data for E.coli inactivation rates, water temperature and hydrological conditions. The model was used to estimate the source distance upstream each sampling point in the investigated section of the river. This procedure enabled the establishment of sections of the river that could influence each sampling point by point or diffuse emissions of E.coli. Studies on human development within the riparian zone of each section could then be related to E.coli data at the sampling points. Data on the latest 20 years of development within the riparian zone was gathered from the local municipality archive which contains information on all new and changed properties. The development data was compared to 18 years long time series of seasonal water quality measurement in the studied river. The analysis also considers the effects of known point sources of faecal pollution within the investigated sections such as discharge from municipal sewage treatment plants. This study shows that E.coli is transported considerably longer during winter compared to summer in a regulated section of the river. Lower water temperatures in the winter increases the survival time of E.coli but there is also a strong effect of water regulation for hydro-electric power generation that completely changes the water flow pattern to relatively higher flow during the wintertime compared to non regulated parts of the river. Both these effects increases the transport distance of E.coli. The study also shows the importance of considering the features of the nearby water body when planning for new settlements.
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| 48. |
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| 49. |
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