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Impact of Electronic Wastes Recycling on Environmental Quality 被引量:10
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作者 JIAN-PING WANG XI-KUN GUO 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2006年第2期137-142,共6页
Objective To evaluate the environmental quality of Guiyu, Guangdong impacted by the electronic waste recycling industry. Methods The surface water, ground water and sediment samples taken separately from two sites tha... Objective To evaluate the environmental quality of Guiyu, Guangdong impacted by the electronic waste recycling industry. Methods The surface water, ground water and sediment samples taken separately from two sites that recycle E-wastes and other rubbish relevant to the E-waste recycling, and an agricultural area, were analyzed, and the data were used to evaluate the impact of E-waste recycling on the environmental quality of Guiyu based on environmental quality standards in China. Results The concentrations of lead and iron in the surface water samples significantly different in the three locations. The maximum value of lead in the first site was 8 times higher than the threshold of environmental quality standards for surface water. The concentration of iron in polluted sample was 22 times that of the background sample. Manganese and iron also showed a significant difference in ground water samples between the three sites. The amount of iron was 22 times that of the threshold of the quality standard for ground water, and 120 times that of the background sample. Moreover, the results of all the eight heavy metals showed significant differences among the sediment samples. The concentrations of copper, cadmium, nickel, and lead in the polluted samples were above the median benchmarks of National Oceanic and Atmospheric Administration (NOAA). The copper concentration of 2670 mg/kg was 10 times that of the median benchmark. Conclusion E-waste recycling has led to the severe pollution Guiyu. 展开更多
关键词 Electronic waste recycling Environmental quality impact evaluation
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Contamination and Remediation of Heavy Metals in Soils near E-waste Recycling Area
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作者 Chen Haitang He Huayan +2 位作者 Zhou Dandan Lou Linjie Hu Qingnian 《Meteorological and Environmental Research》 CAS 2015年第4期21-24,共4页
In order to assess heavy metals pollution in agricultural soil after renovation in typical e-waste recycling areas, 212 soil samples were col- lected and the mass fractions of 7 kinds of heavy metals (Cd, Cr, Cu, Hg,... In order to assess heavy metals pollution in agricultural soil after renovation in typical e-waste recycling areas, 212 soil samples were col- lected and the mass fractions of 7 kinds of heavy metals (Cd, Cr, Cu, Hg, Ni, Pb and Zn) were analyzed. The results indicated that heavy metals pollution in agricultural soil was commonly existed in the study areas, and the soil was slightly contaminated by Pb but was moderately or critically polluted by Cd and Cu. However, the carcinogenic risk and non-carcinogenic risk status by heavy metals pollution were beyond acceptable levels, and soil remediation was quite necessary. After some investigations of bioremediation, we found that saponin as washing agent could highly strenqthen the behavior of heavy metals desorption from soil ,which had a good prospect of engineering practice. 展开更多
关键词 Electrical and electronic waste recycling Heavy metals Soil pollution Health risk Soil remediation China
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Self-healing Ionic Liquid-based Electronics and Beyond 被引量:1
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作者 Shenglong Liao Xiaodong Lian Yapei Wang 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2021年第10期1235-1245,I0005,共12页
Owing to the advantages of non-volatility,outstanding fluidity and easy recyclability,ionic liquid-based electronics,such as thermometer,strain sensors and thermoelectric converters,have been growing as attractive alt... Owing to the advantages of non-volatility,outstanding fluidity and easy recyclability,ionic liquid-based electronics,such as thermometer,strain sensors and thermoelectric converters,have been growing as attractive alternatives to traditionally solid electronics.The fluidic character endows the ionic liquid-based circuit with self-healing ability,satisfying the needs of longer lifetime and less waste generation for electronics,while at the same time brings the risk of leakage.Avoiding the leakage without sacrifice of self-healing ability is one of the major challenges for constructing ionic liquid-based electronic devices.In this feature article,we summarize our recent progresses in developing two types of self-healing electrical devices based on ionic liquids with little risk of leakage.One type involves the encapsulation of ionic liquids in self-healing polymers,and the other type uses ionic polymers or free-standing ionic liquids which are successfully formulated as intrinsically conductive,self-healing,and recyclable electronic devices without additional encapsulation.In the end,a comprehensive outlook is prospected for the future development of ionic liquid-based self-healing electronics,which is expected to spur more innovative work in this field. 展开更多
关键词 Self-healing electronics Self-healing materials Recyclable electronics Ionic liquid Liquid leakage
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Improvement potential of today's WEEE recycling performance: The case of LCD TVs in Belgium
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作者 Paul Vanegas Jef R. Peeters +2 位作者 Dirk Cattrysse Wim Dewulf Joost R. Duflou 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2017年第5期135-149,共15页
Waste of electrical and electronic equipment (WEEE) constitutes one of the most relevant waste streams because of the quantity and presence of valuable materials. However, there is limited knowledge on the resource ... Waste of electrical and electronic equipment (WEEE) constitutes one of the most relevant waste streams because of the quantity and presence of valuable materials. However, there is limited knowledge on the resource potential of urban mining WEEE, as data on material composition, and the efficiency of current recycling treatments are still scarce. In this article, an evaluationof the recycling performance at a national level for one of the fastest growing e-waste streams: LCD TVs is carried out through the following four steps. Firstly, material characterisation is performed by means of sampling of the waste stream. Secondly, a material flow analysis is conducted by evaluating the separation performance of a recycling plant in Belgium..Thirdly, the recovered economic value and avoided environmental impact (EI) of the analysed recycling system is assessed. Finally, the potential of urban mining for Belgium is forecasted. The analysis shows that while recycling performance for ferrous metals and aluminium are relatively high; there is substantial room to better close the material loops for precious metals (PM) and plastics. PMs and plastics account for 66 % of the economic value in LCD TVs and 57% of the El. With the current, commonly applied recycling technology only one-third of the PM and housing plastics are recycled; meaning that for'these material's, at a national level for Belgium, there is a potential for improvement that represents 3.3 million euros in 2016 and 6.8 million euros in 2025. 展开更多
关键词 recycling Waste of electrical and electronic equipment(WEEE) Material flow analysis LCD TVs Precious metals Plastics
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Managing economic and social profit of cooperative models in three-echelon reverse supply chain for waste electrical and electronic equipment 被引量:1
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作者 Jian Li Zhen Wang Bao Jiang 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2017年第5期125-134,共10页
In addition to maximizing economic benefits, reverse supply chains should further seek to maximize social benefits by increasing the quantity of waste electrical and electronic equipment (WEEE). The paper investigat... In addition to maximizing economic benefits, reverse supply chains should further seek to maximize social benefits by increasing the quantity of waste electrical and electronic equipment (WEEE). The paper investigates cooperative models with different parties in a three-echelon reverse supply chain for WEEE consisting of a single collector, a single remanufacturer, and two retailers based on complete information. In acldition, the optimal decisions of four cooperative models and the effect of the market demand of remanufactured WEEE products and the market share of two retailers on the optimal decisions are discussed. The results indicate that optimal total channel profit and recycle quantity in a reverse supply chain are maximized in a centralized model. The optimal total channel profit and recycle quantity increase with an increase in the market demand of remanufactured WEEE products. The three-echelon reverse supply chain consisting of duopolistic retailers maximizes total channel profit and recycle quantity in a reverse supply chain fbr WEEE. 展开更多
关键词 Waste electrical and electronic equipment(WEEE)Reverse supply chains Recycle quantitySocial benefit Cooperative models Duopolistic retailers
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