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https://www.readbyqxmd.com/read/28320621/global-reverse-supply-chain-design-for-solid-waste-recycling-under-uncertainties-and-carbon-emission-constraint
#1
Zhitao Xu, Adel Elomri, Shaligram Pokharel, Qin Zhang, X G Ming, Wenjie Liu
The emergence of concerns over environmental protection, resource conservation as well as the development of logistics operations and manufacturing technology has led several countries to implement formal collection and recycling systems of solid waste. Such recycling system has the benefits of reducing environmental pollution, boosting the economy by creating new jobs, and generating income from trading the recyclable materials. This leads to the formation of a global reverse supply chain (GRSC) of solid waste...
March 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28301822/elevated-lead-levels-and-changes-in-blood-morphology-and-erythrocyte-cr1-in-preschool-children-from-an-e-waste-area
#2
Yifeng Dai, Xia Huo, Yu Zhang, Tian Yang, Minghui Li, Xijin Xu
Improper dismantling and combustion of electronic waste (e-waste) may release persistent organic pollutants and heavy metals that possess potential risk for human health. Lead (Pb) is carried through the circulatory system by erythrocytes and is known to alter the functions of hematopoietic and immune systems. The aim of the study was to investigate the effect of Pb exposure on blood morphology and erythrocyte complement receptor 1 (CR1) levels as related to immunologic function in preschool children. We recruited 484 preschool children, 2- to 6-years of age, among whom 332 children were from Guiyu, a typical and primitive e-waste processing area, and 152 children from Haojiang (reference area)...
March 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28285732/a-novel-approach-for-reducing-toxic-emissions-during-high-temperature-processing-of-electronic-waste
#3
R Saini, R Khanna, R K Dutta, R Cayumil, M Ikram-Ul-Haq, V Agarwala, G Ellamparuthy, K Jayasankar, P S Mukherjee, V Sahajwalla
A novel approach is presented to capture some of the potentially toxic elements (PTEs), other particulates and emissions during the heat treatment of e-waste using alumina adsorbents. Waste PCBs from mobile phones were mechanically crushed to sizes less than 1mm; their thermal degradation was investigated using thermo-gravimetric analysis. Observed weight loss was attributed to the degradation of polymers and the vaporization of organic constituents and volatile metals. The sample assembly containing PCB powder and adsorbent was heat treated at 600°C for times ranging between 10 and 30min with air, nitrogen and argon as carrier gases...
March 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28254720/organic-contaminants-and-heavy-metals-in-indoor-dust-from-e-waste-recycling-rural-and-urban-areas-in-south-china-spatial-characteristics-and-implications-for-human-exposure
#4
Chun-Tao He, Xiao-Bo Zheng, Xiao Yan, Jing Zheng, Mei-Huan Wang, Xiao Tan, Lin Qiao, She-Jun Chen, Zhong-Yi Yang, Bi-Xian Mai
The concentrations of several organic contaminants (OCs) and heavy metals were measured in indoor dust from e-waste recycling, rural, and urban areas in South China to illustrate the spatial characteristics of these pollutants and to further evaluate human exposure risks. The median concentrations of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), decabromodiphenyl ethane (DBDPE), and dechlorane plus (DPs) were 38.6-3560, 2360-30,100, 665-2720, and 19.5-1860ng/g, while the median concentrations of Cd, Pb, Cu, Cr, and Zn were 2...
February 27, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28254052/accumulation-of-polybrominated-diphenyl-ethers-in-breast-milk-of-women-from-an-e-waste-recycling-center-in-china
#5
Xinghong Li, Yuan Tian, Yun Zhang, Yujie Ben, Quanxia Lv
Polybrominated diphenyl ethers (PBDEs) can be transferred to infants through the ingestion of breast milk, resulting in potential health risk. In this study, PBDEs, hydroxylated polybrominated diphenyl ethers (OH-PBDEs) and 2,2',4,4',5,6'-hexachlorobiphenyl (CB-153) in human milk from women living adjacent to e-waste recycling sites of Wenling, China, were investigated. The median level of PBDEs in samples from residents living in the e-waste recycling environment >20years (R20 group, 19.5ng/g lipid weight (lw)) was significantly higher than that for residents living in Wenling <3years (R3 group, 3...
February 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28245931/disruption-of-thyroid-hormone-th-levels-and-th-regulated-gene-expression-by-polybrominated-diphenyl-ethers-pbdes-polychlorinated-biphenyls-pcbs-and-hydroxylated-pcbs-in-e-waste-recycling-workers
#6
Jing Zheng, Chun-Tao He, She-Jun Chen, Xiao Yan, Mi-Na Guo, Mei-Huan Wang, Yun-Jiang Yu, Zhong-Yi Yang, Bi-Xian Mai
Polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) are the primary toxicants released by electronic waste (e-waste) recycling, but their adverse effects on people working in e-waste recycling or living near e-waste sites have not been studied well. In the present study, the serum concentrations of PBDEs, PCBs, and hydroxylated PCBs, the circulating levels of thyroid hormones (THs), and the mRNA levels of seven TH-regulated genes in peripheral blood leukocytes of e-waste recycling workers were analyzed...
February 25, 2017: Environment International
https://www.readbyqxmd.com/read/28216700/a-retrospective-study-of-transfusion-practices-in-a-tertiary-care-institute
#7
Babita Raghuwanshi, N K Pehlajani, Mithilesh K Sinha, Swagata Tripathy
BACKGROUND AND AIMS: Excessive requests for cross matching blood which is more than the blood required for transfusion are usually based on worst case assumptions leading to overestimation of blood usage. We investigated the blood ordering pattern and transfusion practices so as to incorporate a blood ordering schedule for streamlining the use of blood in various hospital departments. METHODS: The study was conducted over a period of 19 months in a 350 bedded tertiary teaching hospital...
January 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28149995/trophic-transfer-of-hexabromocyclododecane-in-the-terrestrial-and-aquatic-food-webs-from-an-e-waste-dismantling-region-in-east-china
#8
Chaofei Zhu, Pu Wang, Yingming Li, Zhaojing Chen, Honghua Li, Patrick Ssebugere, Qinghua Zhang, Guibin Jiang
Trophic transfer of hexabromocyclododecane (HBCD) was investigated in both the terrestrial and aquatic food webs from an e-waste dismantling region in East China. The mean Σ3HBCD concentrations in the terrestrial species varied from 0.91 (0.16-1.85) ng g(-1) lipid weight (lw) in dragonflies (Pantala flavescens) to 40.3 (22.1-51.1) ng g(-1) lw in rats (Rattus norvegicus). The isomeric profile indicated that α-HBCD presented a decreasing trend along the trophic level (TL) (from 97.2% to 16.3% of Σ3HBCDs), while γ-HBCD showed a reverse trend (from 2...
February 2, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28146075/toward-a-more-sustainable-trajectory-for-e-waste-policy-a-review-of-a-decade-of-e-waste-research-in-accra-ghana
#9
REVIEW
Kurt Daum, Justin Stoler, Richard J Grant
Global flows of e-waste from the Global North to the Global South continue to damage local environments and harm human health. Weak e-waste regulations and limited use of safety measures for e-waste workers in Accra, Ghana, foster an exploitative environment within the industry, and pose health risks for those working and living near e-waste processing sites. This paper presents an integrated review of over 40 e-waste studies specific to Accra, with particular emphasis on the well-studied e-waste processing site in Agbogbloshie, and synthesizes the existing research base across interdisciplinary themes of human health, environmental health, globalization, trade and informalization, and public policy...
January 29, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28131042/speciation-and-leaching-of-trace-metal-contaminants-from-e-waste-contaminated-soils
#10
Jin-Li Cui, Chun-Ling Luo, Chloe Wing-Yee Tang, Ting-Shan Chan, Xiang-Dong Li
Primitive electrical and electronic waste (e-waste) recycling activities have caused serious environmental problems. However, little is known about the speciation and leaching behaviors of metal contaminants at e-waste contaminated sites. This study investigated trace metal speciation/mobilization from e-waste polluted soil through column leaching experiments involving irrigation with rainwater for almost 2.5 years. Over the experimental period, Cu and Zn levels in the porewater were 0.14±0.08mg/L, and 0.16±0...
May 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28131039/bioleaching-of-electronic-waste-using-bacteria-isolated-from-the-marine-sponge-hymeniacidon-heliophila-porifera
#11
Enrique E Rozas, Maria A Mendes, Claudio A O Nascimento, Denise C R Espinosa, Renato Oliveira, Guilherme Oliveira, Marcio R Custodio
The bacteria isolated from Hymeniacidon heliophila sponge cells showed bioleaching activity. The most active strain, Hyhel-1, identified as Bacillus sp., was selected for bioleaching tests under two different temperatures, 30°C and 40°C, showing rod-shaped cells and filamentous growth, respectively. At 30°C, the bacteria secreted substances which linked to the leached copper, and at 40°C metallic nanoparticles were produced inside the cells. In addition, infrared analysis detected COOH groups and linear peptides in the tested bacteria at both temperatures...
May 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28128546/long-term-temporal-trends-of-pcbs-and-their-controlling-sources-in-china
#12
Shizhen Zhao, Knut Breivik, Guorui Liu, Minghui Zheng, Kevin C Jones, Andrew J Sweetman
Polychlorinated biphenyls (PCBs) are industrial organic contaminants identified as persistent, bioaccumulative, toxic (PBT) and subject to long-range transport (LRT) with global scale significance. This study focuses on a reconstruction and prediction for China of long-term emission trends of intentionally and unintentionally produced (UP) ∑7PCBs (UP-PCBs, from the manufacture of steel, cement and sinter iron) and their re-emissions from secondary sources (e.g., soils and vegetation), using a dynamic fate model (BETR-Global)...
January 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28105780/effect-of-copper-ion-and-soil-humic-acid-on-biodegradation-of-decabromodiphenyl-ether-bde-209-by-pseudomonas-aeruginosa
#13
Yu Liu, Aijun Gong, Lina Qiu, Jingrui Li, Fukai Li
Pseudomonas aeruginosa is a good environmental microorganism capable of degrading decabromodiphenyl ether (BDE-209). This paper studied the effect of Cu(2+) and humic acid (HA) extracted from e-waste contaminated soils on biodegradation of BDE-209 by P. aeruginosa. The adsorption isotherms of Cu(2+) on HA, the crude enzyme activity, cell surface morphology, and biodegradation pathway were also investigated. The results showed that BDE-209 biodegradation by P. aeruginosa was inhibited at Cu(2+) concentrations above 5 mg L(-1) , but exhibited the best effect at the condition of 40 mg L(-1) Cu(2+)  + 3 g L(-1) HA...
January 19, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28098022/system-dynamics-research-of-remanufacturing-closed-loop-supply-chain-dominated-by-the-third-party
#14
Shidi Miao, Tengfei Wang, Deyun Chen
With the rapid development of the electronic information industry in recent years, electronic products are being updated faster and faster, and e-waste recycling has become a common problem around the world. Firstly, this article contrasts recycling at home and abroad using the predicament of Midea Corp. Based on a closed-loop supply chain with the system dynamics method, a model is constructed and simulated. In this model, the collection point coverage rate is introduced to adjust the e-waste recycling rate dynamically...
January 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28094923/effect-of-e-waste-recycling-on-urinary-metabolites-of-organophosphate-flame-retardants-and-plasticizers-and-their-association-with-oxidative-stress
#15
Shao-You Lu, Yan-Xi Li, Tao Zhang, Dan Cai, Ju-Jun Ruan, Ming-Zhi Huang, Lei Wang, Jian-Qing Zhang, Rong-Liang Qiu
In this study, three chlorinated (Cl-mOPs) and five nonchlorinated (NCl-mOPs) organophosphate metabolites were determined in urine samples collected from participants living in an electronic waste (e-waste) dismantling area (n = 175) and two reference areas (rural, n = 29 and urban, n = 17) in southern China. Bis(2-chloroethyl) phosphate [BCEP, geometric mean (GM): 0.72 ng/mL] was the most abundant Cl-mOP, and diphenyl phosphate (DPHP, 0.55 ng/mL) was the most abundant NCl-mOP. The GM concentrations of mOPs in the e-waste dismantling sites were higher than those in the rural control site...
February 3, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28091997/comparative-assessment-of-metallurgical-recovery-of-metals-from-electronic-waste-with-special-emphasis-on-bioleaching
#16
Anshu Priya, Subrata Hait
Waste electrical and electronic equipment (WEEE) or electronic waste (e-waste) is one of the fastest growing waste streams in the urban environment worldwide. The core component of printed circuit board (PCB) in e-waste contains a complex array of metals in rich quantity, some of which are toxic to the environment and all of which are valuable resources. Therefore, the recycling of e-waste is an important aspect not only from the point of waste treatment but also from the recovery of metals for economic growth...
January 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28089398/high-temperature-investigations-on-optimising-the-recovery-of-copper-from-waste-printed-circuit-boards
#17
R Cayumil, M Ikram-Ul-Haq, R Khanna, R Saini, P S Mukherjee, B K Mishra, V Sahajwalla
High temperature pyrolysis investigations were carried out on waste printed circuit boards (PCBs) in the temperature range 800-1000°C under inert conditions, with an aim to determine optimal operating conditions for the recovery of copper. Pyrolysis residues were characterized using ICP-OES analysis, SEM/EDS and XRD investigations. Copper foils were successfully recovered after pyrolysis at 800°C for 10-20 min; the levels of Pb and Sn present were found to be quite low and these were generally present near the foil edges...
January 12, 2017: Waste Management
https://www.readbyqxmd.com/read/28057419/highly-efficient-and-selective-leaching-of-silver-from-electronic-scrap-in-the-base-activated-persulfate-ammonia-system
#18
Wojciech Hyk, Konrad Kitka
A system composed of persulfate salt and ammonia in highly alkaline aqueous solution is developed and examined for leaching metallic silver from elements of the electronic waste materials (e-scrap). Strong base activates persulfate ions providing in situ generation of highly reactive oxygen molecules. The oxidized metal forms then well soluble complex ions with ammonia ligands. The kinetic studies of the leaching process were performed for pure metallic silver. They revealed that the efficiency of the process is affected by the type of the persulfate salt...
January 2, 2017: Waste Management
https://www.readbyqxmd.com/read/28050763/occurrence-spatial-distribution-and-ecological-risks-of-typical-hydroxylated-polybrominated-diphenyl-ethers-in-surface-sediments-from-a-large-freshwater-lake-of-china
#19
Dan Liu, Sheng-Min Wu, Qin Zhang, Min Guo, Jie Cheng, Sheng-Hu Zhang, Cheng Yao, Jian-Qiu Chen
Hydroxylated polybrominated diphenyl ethers (OH-PBDEs) have been frequently observed in marine aquatic environments; however, little information is available on the occurrence of these compounds in freshwater aquatic environments, including freshwater lakes. In this study, we investigated the occurrence and spatial distribution of typical OH-PBDEs, including 2'-OH-BDE-68, 3-OH-BDE-47, 5-OH-BDE-47, and 6-OH-BDE-47 in surface sediments of Taihu Lake. 3-OH-BDE-47 was the predominant congener, followed by 5-OH-BDE-47, 2'-OH-BDE-68, and 6-OH-BDE-47...
January 3, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28040337/bioaccumulation-of-short-chain-chlorinated-paraffins-in-a-typical-freshwater-food-web-contaminated-by-e-waste-in-south-china-bioaccumulation-factors-tissue-distribution-and-trophic-transfer
#20
Runxia Sun, Xiaojun Luo, Bin Tang, Laiguo Chen, Yu Liu, Bixian Mai
Short chain chlorinated paraffins (SCCPs) are under review for inclusion into the Stockholm Convention on Persistent Organic Pollutants. However, limited information is available on their bioaccumulation and biomagnification in ecosystems, which is hindering evaluation of their ecological and health risks. In the present study, wild aquatic organisms (fish and invertebrates), water, and sediment collected from an enclosed freshwater pond contaminated by electronic waste (e-waste) were analyzed to investigate the bioaccumulation, distribution, and trophic transfer of SCCPs in the aquatic ecosystem...
March 2017: Environmental Pollution
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