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Sökning: WFRF:(Qiu Yanling)

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  • [1]23Nästa
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1.
  • Wu, Yan, et al. (författare)
  • Occurrence and risk assessment of trace metals and metalloids in sediments and benthic invertebrates from Dianshan Lake, China
  • 2017
  • Ingår i: Environmental Science and Pollution Research. - 0944-1344 .- 1614-7499. ; 24:17, s. 14847-14856
  • Tidskriftsartikel (refereegranskat)abstract
    • The present study measured concentrations of Cr, Ni, Cu, Zn, As, Cd, Sb, and Pb in surface sediments and two benthic invertebrate species (Anodonta woodiana and Bellamya aeruginosa) collected from Dianshan Lake, located in the Yangtze River Delta. The Dianshan Lake acts as one of the most important drinking water sources to Shanghai, the biggest city in China. Concentrations of trace metals and metalloids ranged from 0.04 mg/kg for Cd to 288.0 mg/kg for Zn. Substantial bioaccumulation in invertebrates was observed for Zn and Cu based on the biota-sediment accumulation factor (BSAF) measurements. The results revealed that concentrations of metals and metalloids in sediments from Dianshan Lake were at the lower end of the range of levels found in other regions of China. The assessment of three significantly inter-related evaluation indices, including the geo-accumulation Index (I-geo), potential ecological risk factor (Er-i), and mean probable effect concentration quotients (Q(m-PEC)), suggested that sediment-associated trace elements exhibited no considerable ecological risks in the studied watershed. However, the target hazard quotient and hazard index analysis suggested that selected elements (particularly As) accumulation in edible tissues of benthic invertebrates could pose potential health risks to local populations, especially fishermen. Given that wild aquatic organisms (e.g., fish and bivalves) constitute the diet of local populations as popular food/protein choices, further investigations are needed to better elucidate human health risks from metal and metalloid exposure via edible freshwater organisms.
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2.
  • Yin, Ge, et al. (författare)
  • A refined method for analysis of 4,4 '-dicofol and 4,4 '-dichlorobenzophenone
  • 2017
  • Ingår i: Environmental Science and Pollution Research. - 0944-1344 .- 1614-7499. ; 24:15, s. 13307-13314
  • Tidskriftsartikel (refereegranskat)abstract
    • The acaricide, dicofol, is a well-known pesticide and partly a substitute for dichlorodiphenyltrichloroethane (DDT). Only few reports on environmental occurrence and concentrations have been reported calling for improvements. Hence, an analytical method was further developed for dicofol and dichlorobenzophenone (DCBP) to enable assessments of their environmental occurrence. Concentrated sulfuric acid was used to remove lipids and to separate dicofol from DCBP. On-column injection was used as an alternative to splitless injection to protect dicofol from thermal decomposition. By the method presented herein, it is possible to quantify dicofol and DCBP in the same samples. Arctic cod (Gadus morhua) were spiked at two dose levels and the recoveries were determined. The mean recovery for dicofol was 65% at the low dose (1 ng) and 77% at the high dose (10 ng). The mean recovery for DCBP was 99% at the low dose (9.2 ng) and 146% at the high dose (46 ng). The method may be further improved by use of another lipid removal method, e.g., gel permeation chromatography. The method implies a step forward in dicofol environmental assessments.
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3.
  • Zhou, Yihui, et al. (författare)
  • A novel pollution pattern : Highly chlorinated biphenyls retained in Black-crowned night heron (Nycticorax nycticorax) and Whiskered tern (Chlidonias hybrida) from the Yangtze River Delta
  • 2016
  • Ingår i: Chemosphere. - 0045-6535 .- 1879-1298. ; 150, s. 491-498
  • Tidskriftsartikel (refereegranskat)abstract
    • Contamination of organochlorine pesticides (OCPs), polychlorinated diphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), hydroxylated polybrominated diphenyl ethers (OH-PBDEs) and their methylated counterparts (MeO-PBDEs) were determined in Black-crowned night heron (Nycticorax nycticorax) and Whiskered tern (Chlidonias hybrida) from two drinking water sources, e.g. Tianmu lake and East Tai lake in Yangtze River Delta, China. A novel PCBs contamination pattern was detected, including 11% and 6.9% highly chlorinated biphenyls (PCBs with eight to ten chlorines) in relation to total PCB concentrations in the Black-crowned night heron and Whiskered tern eggs, respectively. The predominating OCPs detected in the present study were 4,4'-DDE, with concentration range 280-650 ng g(-1) lw in Black crowned night heron and 240-480 ng g(-1) lw in Whiskered tern, followed by beta-HCH and Mirex. 6MeO-BDE-90 and 6-MeO-BDE-99 are the two predominant congeners of MeO-PBDEs whereas 6-OH-BDE-47 contributes mostly to the OH-PBDEs in both species. Contamination level was considered as median or low level compared global data.
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4.
  • Zhou, Yihui, et al. (författare)
  • Chlorinated Paraffins in Human Milk from Urban Sites in China, Sweden, and Norway
  • 2020
  • Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 54:7, s. 4356-4366
  • Tidskriftsartikel (refereegranskat)abstract
    • Short-, medium-, and long-chain chlorinated paraffins (SCCPs, MCCPs, and LCCPs) were analyzed in human milk from the Yangtze River Delta (YRD) and Scandinavia. Individual samples were collected from Shanghai, Jiaxing, and Shaoxing (China), Stockholm (Sweden), and Bodø (Norway) between 2010 and 2016. Mean concentrations (range) of SCCPs, MCCPs, and LCCPs in samples from the YRD were 124 [-1 fat, respectively, all of which were significantly (p < 0.05) higher than 15.9 (-1 fat, respectively, in samples from Scandinavia. MCCPs predominate in most samples, and LCCP concentrations exceed reported for polybrominated diphenyl ethers in human milk from the same regions. This study is the first to confirm LCCP exposure via breastfeeding. Principal component analysis showed that the YRD samples were more influenced by SCCPs than the Scandinavian samples, which mirror different exposures to CPs between the regions. Because of a large variation in concentrations among individuals, SCCP intake via breastfeeding indicated a potential health concern in the 90th percentile among Chinese infants. Further, CP concentrations in the YRD samples from first-time mothers were on average three times higher than from second-time mothers. In order to limit the worldwide CP contamination, the inclusion of SCCPs as persistent organic pollutants in the Stockholm Convention needs to be followed up, with the inclusion of MCCPs and LCCPs as well.
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5.
  • Zhou, Yihui, et al. (författare)
  • Extensive organohalogen contamination in wildlife from a site in the Yangtze River Delta
  • 2016
  • Ingår i: Science of the Total Environment. - 0048-9697 .- 1879-1026. ; 554, s. 320-328
  • Tidskriftsartikel (refereegranskat)abstract
    • The environmental and human health concerns for organohalogen contaminants (OHCs) extend beyond the 23 persistent organic pollutants (POPs) regulated by the Stockholm Convention. The current, intense industrial production and use of chemicals in China and their bioaccumulation makes Chinese wildlife highly suitable for the assessment of legacy, novel and emerging environmental pollutants. In the present study, six species of amphibians, fish and birds were sampled from paddy fields in the Yangtze River Delta (YRD) were screened for OHCs. Some extensive contamination was found, both regarding number and concentrations of the analytes, among the species assessed. High concentrations of chlorinated paraffins were found in the snake, Short-tailed mamushi (range of 200-340 mu g g(-1) lw), Peregrine falcon (8-59 mu g g(-1) lw) and Asiatic toad (97 mu g g(-1) lw). Novel contaminants and patterns were observed; octaCBs to decaCB made up 20% of the total polychlorinated biphenyls (PCBs) content in the samples and new OHCs, substituted with 5-8 chlorines, were found but are not yet structurally confirmed. In addition, Dechlorane 602 (DDC-DBF) and numerous other OHCs (DDTs, hexachlorocyclohexanes (HCHs), polybrominated diphenyl ethers (PBDEs), hexbromocyclododecane (HBCDD), chlordane, heptachlor, endosulfan and Mirex) were found in all species analyzed. These data show extensive chemical contamination of wildlife in the YRD with a suite of OHCs with both known and unknown toxicities, calling for further indepth studies.
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6.
  • Zhou, Yihui, et al. (författare)
  • Human exposure to PCDDs and their precursors from heron and tern eggs in the Yangtze River Delta indicate PCP origin
  • 2017
  • Ingår i: Environmental Pollution. - 0269-7491 .- 1873-6424. ; 225, s. 184-192
  • Tidskriftsartikel (refereegranskat)abstract
    • Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are highly toxic to humans and wildlife. In the present study, PCDD/Fs were analyzed in the eggs of whiskered terns (Chlidonias hybrida), and genetically identified eggs from black-crowned night herons (Nycticorax nycticorax) sampled from two lakes in the Yangtze River Delta area, China. The median toxic equivalent (TEQ) of PCDD/Fs were 280 (range: 95-1500) and 400 (range: 220-1100) pg TEQ g(-1) lw (WHO, 1998 for birds) in the eggs of black-crowned night heron and whiskered tern, respectively. Compared to known sources, concentrations of PCDDs relative to the sum of PCDD/Fs in bird eggs, demonstrated high abundance of octachlorodibenzo-p-dioxin (OCDD), 1,2,3,4,6,7,8-heptaCDD and 1,2,3,6,7,8-hexaCDD indicating pentachlorophenol (PCP), and/or sodium pentachlorophenolate (Na-PCP) as significant sources of the PCDD/Fs. The presence of polychlorinated diphenyl ethers (PCDEs), hydroxylated and methoxylated polychlorinated diphenyl ethers (OH-and Me0-PCDEs, known impurities in PCP products), corroborates this hypothesis. Further, significant correlations were found between the predominant congener CDE-206, 3'-OH-CDE-207, 2'-MeO-CDE-206 and OCDD, indicating a common origin. Eggs from the two lakes are sometimes used for human consumption. The WHO health-based tolerable intake of PCDD/Fs is exceeded if eggs from the two lakes are consumed regularly on a weekly basis, particularly for children. The TEQs extensively exceed maximum levels for PCDD/Fs in hen eggs and egg products according to EU legislation (2.5 pg TEQ g(-1)/w). The results suggest immediate action should be taken to manage the contamination, and further studies evaluating the impacts of egg consumption from wild birds in China. Likewise, studies on dioxins and other POPs in common eggs need to be initiated around China.
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7.
  • Chemical Pollution Challenges in the Yangtze River Delta : Communication Brief
  • 2019
  • Samlingsverk (redaktörskap) (övrigt vetenskapligt)abstract
    • Chemical Pollution — Challenges in the Yangtze River Delta: Communication Brief is the second and final scientific report of the Chemstrres project. This book covers the results of the cooperation in relation to scientific output, collaborative results and interaction and higher educational achievements including the construction of joint facilities, the Yangtze Environmental Specimen Bank and extended science based exchange. The book is a follow up on Chemical Pollution — Challenges in the Yangtze River Delta (DiVA, id: diva2:1138019). Main results of the ten subprojects performed are given in the book, addressing: i. ecotoxicology studies with the pond snail; ii: on chlorinated paraffins and iii: establishment of the pond snail as a research monitoring species in the Yangtze River Delta. Further. iv: drinking water contaminants were studied in a screening project; v: pollutants in sewage sludge as a mirror of human activities, as well; vi: assessments of persistent and bioaccumulative compounds in wildlife from the Yangtze River Delta were performed; vii: heron eggs were analysed to determine the environmental quality in the region as well as viii:  monitoring of pollutants in mothers’ milk in the Yangtze River Delta, Sweden and Norway were performed. Finally, ix: investigations were carried out to determine optimal fish species for research monitoring in the Yangtze River Delta and in a subproject number x: chemical pollutants were assessed in indoor dust. Reference to 45 authentic peer reviewed scientific articles are presented in the book.
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8.
  • Chemical Pollution - Challenges in the Yangtze River Delta, China : A 2017 Sino-Swedish Research Report
  • 2017
  • Samlingsverk (redaktörskap) (övrigt vetenskapligt)abstract
    • Over time China became the globally most important manufacturer of chemicals and inherited the pollution problems with production and use of chemicals. The Yangtze River Delta is very much a central area for the chemical production and for manufacturing of a variety of chemical products, materials and goods. A science based cooperation between researchers from Tongji University, Stockholm University and the Swedish Museum of Natural History started to develop in the first decade of the present century. The cooperation was aimed to improve the understanding of chemical pollutants and their influence on wildlife and humans in the Yangtze River Delta area, to generate novel data and establish advanced chemical monitoring programs.Chemical Pollution — Challenges in the Yangtze River Delta is the first scientific report of the Chemstrres project, "Swedish-Chinese chemical pollution stress and risks research program in the Yangtze River Delta region". The project has been funded by the Swedish Research Council. This book covers the essentials of the natural, social, economic, and chemical environments of the Yangtze River Delta, as well as an up-to-date, introduction of the research activities and highlights within Chemstrres. The book is aimed to attract readers from all sectors of society; vivid graphics and diagrams can be found throughout the text. Both Chemstrres project and this book are expected to bring scientists and decision makers closer together, to enable science based management for improved human health and environmental prosperity. 
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9.
  • Du, Xinyu, et al. (författare)
  • Short-, Medium-, and Long-Chain Chlorinated Paraffins in Wildlife from Paddy Fields in the Yangtze River Delta
  • 2018
  • Ingår i: Environmental Science and Technology. - 0013-936X .- 1520-5851. ; 52:3, s. 1072-1080
  • Tidskriftsartikel (refereegranskat)abstract
    • Short-chain chlorinated paraffins (SCCPs) were added to Annex A of the Stockholm Convention on Persistent Organic Pollutants in April, 2017. As a consequence of this regulation, increasing production and usage of alternatives, such as medium- and long-chain chlorinated paraffins (MCCPs and LCCPs, respectively), is expected. Little is known about the environmental fate and behavior of MCCPs and LCCPs. In the present study, SCCPs, MCCPs, and LCCPs were analyzed in nine wildlife species from paddy fields in the Yangtze River Delta, China, using atmospheric pressure chemical ionization-quadrupole time-of-flight mass spectrometry. SCCPs, MCCPs, and LCCPs were detected in all samples at concentrations ranging from <91-43000, 96-33 000, and 14-10000 ng/g lipid, respectively. Most species contained primarily MCCPs (on average 44%), with the exception of collared scops owl and common cuckoo, in which SCCPs (43%) accumulated to a significantly (i.e., p < 0.05) greater extent than MCCPs (40%). Cl-6 groups were dominant in most species except for yellow weasel and short-tailed mamushi, which contained primarily Cl-7 groups. Principal components analysis, together with CP concentrations and carbon stable isotope analysis showed that habitat and feeding habits were key factors driving CP accumulation and congener group patterns in wildlife. This is the first report of LCCP exposure in wildlife and highlights the need for data on risks associated with CP usage.
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10.
  • Du, Xinyu, et al. (författare)
  • Tissue-Specific Accumulation, Sexual Difference, and Maternal Transfer of Chlorinated Paraffins in Black-Spotted Frogs
  • 2019
  • Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 53:9, s. 4739-4746
  • Tidskriftsartikel (refereegranskat)abstract
    • The restriction on usage of short-chain chlorinated paraffins (SCCPs) under Stockholm Convention may promote the production and application of medium chain chlorinated paraffins (MCCPs) and long chain chlorinated paraffins (LCCPs) as substitutes. This study focused on the tissue-specific exposure to SCCPs, MCCPs, and LCCPs in black-spotted frog, a prevalent amphibian species in the Yangtze River Delta, China. The total CP concentrations in frog liver, muscle, and egg samples ranged of 35-1200, 6.3-97, and 6.8-300 ng/g wet weight (ww), respectively. Livers and eggs contained primary SCCPs (on average 78%) while MCCPs (43%) together with SCCPs (41%) were dominant in muscles. A significantly negative correlation was observed between hepatosomatic index and CPs concentration in liver (p < 0.01), indicating that CP exposure may lower survival rates of frogs by suppressing the energy storage in liver. Additionally, maternal transfer, an important uptake pathway for CPs, was evaluated for the first time by calculating the ratios of CP levels in eggs to those in their paired liver tissues. The ratio of egg to liver for CP congener groups raised with the increasing of log K-ow values, indicating mother to egg transport of CPs was related to the lipophilicity of the chemicals.
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