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https://www.readbyqxmd.com/read/28549288/ecological-effects-of-soil-properties-and-metal-concentrations-on-the-composition-and-diversity-of-microbial-communities-associated-with-land-use-patterns-in-an-electronic-waste-recycling-region
#1
Wencheng Wu, Changxun Dong, Jiahui Wu, Xiaowen Liu, Yingxin Wu, Xianbin Chen, Shixiao Yu
Soil microbes play vital roles in ecosystem functions, and soil microbial communities may be strongly structured by land use patterns associated with electronic waste (e-waste) recycling activities, which can increase the heavy metal concentration in soils. In this study, a suite of soils from five land use types (paddy field, vegetable field, dry field, forest field, and e-waste recycling site) were collected in Longtang Town, Guangdong Province, South China. Soil physicochemical properties and heavy metal concentrations were measured, and the indigenous microbial assemblages were profiled using 16S rRNA high-throughput sequencing and clone library analyses...
May 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28532622/solid-waste-generation-and-characterization-in-the-university-of-lagos-for-a-sustainable-waste-management
#2
A E Adeniran, A T Nubi, A O Adelopo
Waste characterization is the first step to any successful waste management policy. In this paper, the characterization and the trend of solid waste generated in University of Lagos, Nigeria was carried out using ASTM D5231-92 and Resource Conservation Reservation Authority RCRA Waste Sampling Draft Technical Guidance methods. The recyclable potential of the waste is very high constituting about 75% of the total waste generated. The estimated average daily solid waste generation in Unilag Akoka campus was estimated to be 32...
May 19, 2017: Waste Management
https://www.readbyqxmd.com/read/28521210/selective-thermal-transformation-of-old-computer-printed-circuit-boards-to-cu-sn-based-alloy
#3
Ali Shokri, Farshid Pahlevani, Ivan Cole, Veena Sahajwalla
This study investigates, verifies and determines the optimal parameters for the selective thermal transformation of problematic electronic waste (e-waste) to produce value-added copper-tin (Cu-Sn) based alloys; thereby demonstrating a novel new pathway for the cost-effective recovery of resources from one of the world's fastest growing and most challenging waste streams. Using outdated computer printed circuit boards (PCBs), a ubiquitous component of e-waste, we investigated transformations across a range of temperatures and time frames...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28482316/a-pilot-study-on-health-risk-assessment-based-on-body-loadings-of-pcbs-of-lactating-mothers-at-taizhou-china-the-world-s-major-site-for-recycling-transformers
#4
Yu Bon Man, Ka Lai Chow, Guan Hua Xing, Janet Kit Yan Chan, Sheng Chun Wu, Ming Hung Wong
Our early study reported an extraordinarily high Estimated Daily Intake (EDI) of PCBs of lactating mothers from Taizhou, Zhejiang Province, China (based on a food consumption survey and food basket analysis). The EDI well exceeded the intake limit stipulated by FAO/WHO 70 pg TEQ/kg body weight (bw)/month. The present pilot study provided further information on PCBs body burden in lactating mothers of Taizhou. The total PCBs detected in human milk, placenta and hair samples of these lactating mothers were 363 ng/g lipid, 224 ng/g lipid, and 386 ng/g dry wt...
May 5, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28477162/polychlorinated-biphenyls-and-their-hydroxylated-metabolites-in-the-serum-of-e-waste-dismantling-workers-from-eastern-china
#5
Shengtao Ma, Guofa Ren, Xiangying Zeng, Zhiqiang Yu, Guoying Sheng, Jiamo Fu
A number of studies have reported on the exposure of e-waste dismantling workers to significantly high concentrations of halogenated organic pollutants such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers. Such exposure can have adverse health effects. However, little information on the metabolites of these contaminants exists. In this study, we investigated PCBs levels and their hydroxylated metabolites (OH-PCB) in the serum of e-waste workers in Taizhou in eastern China. Our results indicate elevated PCB and OH-PCB levels in the serum of the workers, with medians of 443...
May 5, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28438268/fungal-biorecovery-of-gold-from-e-waste
#6
Saskia Bindschedler, Thi Quynh Trang Vu Bouquet, Daniel Job, Edith Joseph, Pilar Junier
Waste electric and electronic devices (e-waste) represent a source of valuable raw materials of great interest, and in the case of metals, e-waste might become a prized alternative source. Regarding gold, natural ores are difficult to mine due to their refractory nature and the richest ores have almost all been exploited. Additionally, some gold mining areas are present in geopolitically unstable regions. Finally, the gold mining industry produces toxic compounds, such as cyanides. As a result, the gold present in e-waste represents a nonnegligible resource (urban mining)...
2017: Advances in Applied Microbiology
https://www.readbyqxmd.com/read/28390022/treatment-of-decabromodiphenyl-ether-bde209-contaminated-soil-by-solubilizer-enhanced-electrokinetics-coupled-with-zvi-prb
#7
Rongbing Fu, Dongdong Wen, Xing Chen, Yingying Gu, Zhen Xu, Wei Zhang
Decabromodiphenyl ether (BDE209) is a typical soil contaminant released from e-waste recycling sites (EWRSs). Electrokinetics (EK) has been considered as an excellent treatment technology with a promising potential to effectively remove organic pollutants in soil. In this study, the treatment of BDE209-polluted soil by EK was explored. All the EK experiments were conducted under a constant voltage gradient (2 V cm(-1)) for 14 days. Deionized water (DI water), hydroxypropyl-β-cyclodextrin (HPCD), sodium dodecyl sulfate (SDS), and humic acid (HA) were applied as the processing fluid...
April 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28353403/the-urgent-need-for-health-impact-assessment-proposing-a-transdisciplinary-approach-to-the-e-waste-crisis-in-sub-saharan-africa
#8
Dinah Tetteh, Lara Lengel
Electronic waste (e-waste) is a growing health and environmental concern in developing countries. In the sub-Saharan African region e-waste is considered a crisis with no end in sight yet; there is lack of structures and regulations to manage the problem. In this article, we discuss the potential of Health Impact Assessment (HIA) in addressing the health, environmental, and social impacts of e-waste in sub-Saharan Africa. We draw from environmental policy, environmental communication, global health policy, and health communication to argue that managing e-waste could be framed as ongoing HIA where all the steps of HIA are performed on a rolling basis with input from local communities...
March 1, 2017: Global Health Promotion
https://www.readbyqxmd.com/read/28343715/occurrence-profiles-and-toxic-equivalents-of-chlorinated-and-brominated-polycyclic-aromatic-hydrocarbons-in-e-waste-open-burning-soils
#9
Chiya Nishimura, Yuichi Horii, Shuhei Tanaka, Kwadwo Ansong Asante, Florencio Ballesteros, Pham Hung Viet, Takaaki Itai, Hidetaka Takigami, Shinsuke Tanabe, Takashi Fujimori
We conducted this study to assess the occurrence, profiles, and toxicity of chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs) and brominated polycyclic aromatic hydrocarbons (Br-PAHs) in e-waste open burning soils (EOBS). In this study, concentrations of 15 PAHs, 26 Cl-PAHs and 14 Br-PAHs were analyzed in EOBS samples. We found that e-waste open burning is an important emission source of Cl-PAHs and Br-PAHs as well as PAHs. Concentrations of total Cl-PAHs and Br-PAHs in e-waste open burning soil samples ranged from 21 to 2800 ng/g and from 5...
March 23, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28320621/global-reverse-supply-chain-design-for-solid-waste-recycling-under-uncertainties-and-carbon-emission-constraint
#10
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
#11
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
#12
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
#13
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...
June 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
#14
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
#15
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
#16
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
#17
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 22, 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
#18
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
#19
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
#20
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
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