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https://www.readbyqxmd.com/read/27876241/recycling-of-typical-difficult-to-treat-e-waste-synthesize-zeolites-from-waste-cathode-ray-tube-funnel-glass
#1
Zhitong Yao, Daidai Wu, Jie Liu, Weihong Wu, Hongting Zhao, Junhong Tang
The disposal of waste cathode ray-tubes (CRTs) from old televisions and discarded computer monitors has become a major environmental concern worldwide. In this work, an open-loop recycling method was developed to synthesize zeolites using CRT funnel glass as the raw material. The effects of hydrothermal temperatures and pressure, n(SiO2/Al2O3) molar ratios and hydrothermal time on the resulting products were investigated. The results indicated that hydrothermal temperatures and pressure played critical roles in zeolite synthesis...
November 15, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27858274/the-assessment-of-source-attribution-of-soil-pollution-in-a-typical-e-waste-recycling-town-and-its-surrounding-regions-using-the-combined-organic-and-inorganic-dataset
#2
Jie Luo, Shihua Qi, Xianming Xie, X W Sophie Gu, Jinji Wang
Guiyu is a well-known electronic waste dismantling and recycling town in south China. Concentrations and distribution of the 21 mineral elements and 16 polycyclic aromatic hydrocarbons (PAHs) collected there were evaluated. Principal component analyses (PCA) applied to the data matrix of PAHs in the soil extracted three major factors explaining 85.7% of the total variability identified as traffic emission, coal combustion, and an unidentified source. By using metallic or metalloid element concentrations as variables, five principal components (PCs) were identified and accounted for 70...
November 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27858271/pilot-study-on-the-internal-exposure-to-heavy-metals-of-informal-level-electronic-waste-workers-in-agbogbloshie-accra-ghana
#3
Jürgen Wittsiepe, Torsten Feldt, Holger Till, Gerd Burchard, Michael Wilhelm, Julius N Fobil
Informal-level electronic waste (e-waste)-processing activities are performed at hotspots in developing countries such as India, China, and Ghana. These activities increase the ambient burden of heavy metals and contribute to the toxic exposure of the general population. However, few data exist on the internal exposure of populations involved in these informal activities and in close contact with fumes from the direct combustion of electronic waste products in these countries. Therefore, in a cross-sectional study design, we analyzed blood, urine, and hair samples from 75 e-waste workers residing in and/or working on a large e-waste recycling site in Agbogbloshie, Accra, Ghana, and compared the results against those of 40 individuals living in a suburb of Accra without direct exposure to e-waste recycling activities...
November 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27775342/polybrominated-diphenyl-ethers-pbdes-in-surface-soils-across-five-asian-countries-levels-spatial-distribution-and-source-contribution
#4
Wen-Long Li, Wan-Li Ma, Hongliang Jia, Wenjun Hong, Hyo-Bang Moon, Haruhiko Nakata, Nguyen Hung Minh, Ravindra Kumar Sinha, Kai Hsien Chi, Kurunthachalam Kannan, Ed Sverko, Yi-Fan Li
A total of 23 PBDE congeners were measured in soil samples collected in areas with no known point source (urban/rural/background sites, U/R/B sites) and in contaminated areas (brominated flame retardants (BFRs) related industrial and e-waste recycling sites) across five Asian countries. The highest PBDE concentrations were found in BFRs related industrial and e-waste recycling sites. The concentrations of PBDEs in U/R/B sites followed the order of: urban > rural > background sites. Total PBDE concentrations were dominated by BDE-209, while BDE-17, -85, -138, -191, -204 and -205 were the least abundant compounds...
October 24, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27769652/a-proposal-to-improve-e-waste-collection-efficiency-in-urban-mining-container-loading-and-vehicle-routing-problems-a-case-study-of-poland
#5
Piotr Nowakowski
Waste electrical and electronic equipment (WEEE), also known as e-waste, is one of the most important waste streams with high recycling potential. Materials used in these products are valuable, but some of them are hazardous. The urban mining approach attempts to recycle as many materials as possible, so efficiency in collection is vital. There are two main methods used to collect WEEE: stationary and mobile, each with different variants. The responsibility of WEEE organizations and waste collection companies is to assure all resources required for these activities - bins, containers, collection vehicles and staff - are available, taking into account cost minimization...
October 18, 2016: Waste Management
https://www.readbyqxmd.com/read/27751635/short-chain-chlorinated-paraffins-in-soil-paddy-seeds-oryza-sativa-and-snails-ampullariidae-in-an-e-waste-dismantling-area-in-china-homologue-group-pattern-spatial-distribution-and-risk-assessment
#6
Bo Yuan, Jianjie Fu, Yawei Wang, Guibin Jiang
Short-chain chlorinated paraffins (SCCPs) in multi-environmental matrices are studied in Taizhou, Zhejiang Province, China, which is a notorious e-waste dismantling area. The investigated matrices consist of paddy field soil, paddy seeds (Oryza sativa, separated into hulls and rice unpolished) and apple snails (Ampullariidae, inhabiting the paddy fields). The sampling area covered a 65-km radius around the contamination center. C10 and C11 are the two predominant homologue groups in the area, accounting for about 35...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27726897/from-electronic-consumer-products-to-e-wastes-global-outlook-waste-quantities-recycling-challenges
#7
Berrin Tansel
Advancements in technology, materials development, and manufacturing processes have changed the consumer products and composition of municipal solid waste (MSW) since 1960s. Increasing quantities of discarded consumer products remain a major challenge for recycling efforts, especially for discarded electronic products (also referred as e-waste). The growing demand for high tech products has increased the e-waste quantities and its cross boundary transport globally. This paper reviews the challenges associated with increasing e-waste quantities...
October 8, 2016: Environment International
https://www.readbyqxmd.com/read/27723459/innovating-e-waste-management-from-macroscopic-to-microscopic-scales
#8
Xianlai Zeng, Congren Yang, Joseph F Chiang, Jinhui Li
Waste electrical and electronic equipment (WEEE or e-waste) has become a global problem, due to its potential environmental pollution and human health risk, and its containing valuable resources (e.g., metals, plastics). Recycling for e-waste will be a necessity, not only to address the shortage of mineral resources for electronics industry, but also to decline environmental pollution and human health risk. To systematically solve the e-waste problem, more attention of e-waste management should transfer from macroscopic to microscopic scales...
October 7, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27713186/fluorescent-protein-integrated-white-leds-for-displays
#9
Daniel Aaron Press, Rustamzhon Melikov, Deniz Conkar, Elif Nur Firat-Karalar, Sedat Nizamoglu
The usage time of displays (e.g., TVs, mobile phones, etc) is in general shorter than their functional life time, which worsens the electronic waste (e-waste) problem around the world. The integration of biomaterials into electronics can help to reduce the e-waste problem. In this study, we demonstrate fluorescent protein integrated white LEDs to use as a backlight source for liquid crystal (LC) displays for the first time. We express and purify enhanced green fluorescent protein (eGFP) and monomeric Cherry protein (mCherry), and afterward we integrate these proteins as a wavelength-converter on a blue LED chip...
November 11, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27712944/degradation-of-organic-pollutants-by-ag-cu-and-sn-doped-waste-non-metallic-printed-circuit-boards
#10
Kadari Ramaswamy, Velchuri Radha, M Malathi, Muga Vithal, Nagegownivari R Munirathnam
The disposal and reuse of waste printed circuit boards have been the major global concerns. Printed circuit boards, a form of Electronic waste (hereafter e-waste), have been chemically processed, doped with Ag(+), Cu(2+) and Sn(2+), and used as visible light photocatalysts against the degradation of methylene blue and methyl violet. The elemental analyses of pristine and metal doped printed circuit board were obtained using energy dispersive X-ray fluorescence (EDXRF) spectra and inductively coupled plasma optical emission spectroscopy (ICP-OES)...
October 3, 2016: Waste Management
https://www.readbyqxmd.com/read/27710884/selective-dissolution-followed-by-edds-washing-of-an-e-waste-contaminated-soil-extraction-efficiency-fate-of-residual-metals-and-impact-on-soil-environment
#11
Jingzi Beiyuan, Daniel C W Tsang, Marjorie Valix, Weihua Zhang, Xin Yang, Yong Sik Ok, Xiang-Dong Li
To enhance extraction of strongly bound metals from oxide minerals and organic matter, this study examined the sequential use of reductants, oxidants, alkaline solvents and organic acids followed by a biodegradable chelating agent (EDDS, [S,S]-ethylene-diamine-disuccinic-acid) in a two-stage soil washing. The soil was contaminated by Cu, Zn, and Pb at an e-waste recycling site in Qingyuan city, China. In addition to extraction efficiency, this study also examined the fate of residual metals (e.g., leachability, bioaccessibility, and distribution) and the soil quality parameters (i...
January 2017: Chemosphere
https://www.readbyqxmd.com/read/27708287/pollution-centralized-pilot-for-e-waste-processing
#12
COMMENT
Ya Tang
No abstract text is available yet for this article.
October 5, 2016: Nature
https://www.readbyqxmd.com/read/27692881/decreased-vaccine-antibody-titers-following-exposure-to-multiple-metals-and-metalloids-in-e-waste-exposed-preschool-children
#13
Xinjiang Lin, Xijin Xu, Xiang Zeng, Long Xu, Zhijun Zeng, Xia Huo
We explored acquired immunity resulting from vaccination in 3 to 7-year-old children, chronically exposed to multiple heavy metals and metalloids, in an e-waste recycling area (Guiyu, China). Child blood levels of ten heavy metals and metalloids, including lead (Pb), arsenic (As), mercury (Hg), chromium (Cr), cadmium (Cd), manganese (Mn), nickel (Ni), copper (Cu), zinc (Zn) and selenium (Se), and seven vaccine antibodies (diphtheria, pertussis, tetanus, hepatitis B, Japanese encephalitis, polio, measles) were measured...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27687078/where-next-on-e-waste-in-australia
#14
Artem Golev, Diego R Schmeda-Lopez, Simon K Smart, Glen D Corder, Eric W McFarland
For almost two decades waste electrical and electronic equipment, WEEE or e-waste, has been considered a growing problem that has global consequences. The value of recovered materials, primarily in precious and base metals, has prompted some parts of the world to informally and inappropriately process e-waste causing serious environmental and human health issues. Efforts in tackling this issue have been limited and in many ways unsuccessful. The global rates for formal e-waste treatment are estimated to be below the 20% mark, with the majority of end-of-life (EoL) electronic devices still ending up in the landfills or processed through rudimentary means...
September 26, 2016: Waste Management
https://www.readbyqxmd.com/read/27678000/integrated-bioleaching-of-copper-metal-from-waste-printed-circuit-board-a-comprehensive-review-of-approaches-and-challenges
#15
Abhishek Kumar Awasthi, Xianlai Zeng, Jinhui Li
Waste electrical and electronic equipment (e-waste) is the most rapidly growing waste stream in the world, and the majority of the residues are openly disposed of in developing countries. Waste printed circuit boards (WPCBs) make up the major portion of e-waste, and their informal recycling can cause environmental pollution and health risks. Furthermore, the conventional disposal and recycling techniques-mechanical treatments used to recover valuable metals, including copper-are not sustainable in the long term...
September 28, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27665374/s100p-is-a-potential-molecular-target-of-cadmium-induced-inhibition-of-human-placental-trophoblast-cell-proliferation
#16
Taimei Zhou, Haiying Wang, Shen Zhang, Xinglin Jiang, Xiaolong Wei
Cadmium, a common and highly toxic pollutant, has been known to accumulate high concentrations in placenta with deleterious effects on placental structure and function. Cadmium inhibits cell proliferation in placenta via targeting metal binding proteins. S100P, a Ca(2+)-binding protein, plays an important role in promoting cell proliferation and our previous study found its downregulation was linked to cadmium exposure in Guiyu, a famous e-waste recycling town in China. So, the present study was aimed to define whether cadmium inhibited cell proliferation through interfering with S100P...
September 21, 2016: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
https://www.readbyqxmd.com/read/27663875/exposure-to-toxicants-in-soil-and-bottom-ash-deposits-in-agbogbloshie-ghana-human-health-risk-assessment
#17
S Obiri, O D Ansa-Asare, S Mohammed, H F Darko, A G Dartey
Recycling of e-waste using informal or crude techniques poses serious health risk not only to the workers but also to the environment as whole. It is against this background that this paper sought to measure health risk faced by informal e-waste workers from exposure to toxicants such as lead, cadmium, chromium, copper, arsenic, tin, zinc and cobalt via oral and dermal contact with bottom ash and soil. Using random sampling techniques, 3 separate sites each (where burning and manual dismantling of e-wastes are usually carried) were identified, and a total of 402 samples were collected...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27645143/source-identification-and-apportionment-of-pm2-5-and-pm2-5-10-in-iron-and-steel-scrap-smelting-factory-environment-using-pmf-pcfa-and-unmix-receptor-models
#18
Lasun T Ogundele, Oyediran K Owoade, Felix S Olise, Philip K Hopke
To identify the potential sources responsible for the particulate matter emission from secondary iron and steel smelting factory environment, PM2.5 and PM2.5-10 particles were collected using the low-volume air samplers twice a week for a year. The samples were analyzed for the elemental and black carbon content using x-ray fluorescence spectrometer and optical transmissometer, respectively. The average mass concentrations were 216.26, 151.68, and 138. 62 μg/m(3) for PM2.5 and 331.36, 190.01, and 184.60 μg/m(3) for PM2...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27627687/polychlorinated-dibenzo-p-dioxins-furans-pcdd-fs-and-polychlorinated-biphenyls-pcbs-in-zhejiang-foods-2006-2015-market-basket-and-polluted-areas
#19
Haitao Shen, Rongfa Guan, Gangqiang Ding, Qing Chen, Xiaoming Lou, Zhijian Chen, Lei Zhang, Mingluan Xing, Jianlong Han, Yongning Wu
In this study, we measured the levels of polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) and polychlorinated biphenyls (PCBs) in 620 foods collected during 2006-2015 from Zhejiang market, a municipal waste incinerator (MWI) and E-waste disassembling areas. For market retail foods, the levels of PCDD/F TEQs, PCDD/F plus dioxin-like PCB (DL-PCB) TEQs, and the concentrations of six indicator PCBs were generally below the EU ML. The average TEQ values for the 13 food groups were 42% of EU ML for PCDD/Fs and 32% for PCDD/Fs+DL-PCBs...
September 11, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27613322/accumulation-of-polybrominated-diphenyl-ethers-in-the-brain-compared-with-the-levels-in-other-tissues-among-different-vertebrates-from-an-e-waste-recycling-site
#20
Yaxian Zhao, Yuanyuan Li, Xiaofei Qin, Qinqin Lou, Zhanfen Qin
This study aimed to investigate the accumulation of polybrominated diphenyl ethers (PBDEs) in the brain compared with that in other tissues among different vertebrates. We collected mice, chickens, ducks, frogs, and fish from an e-waste recycling region in Taizhou, China, and measured PBDE concentrations in brain, liver and muscle tissues. The levels of PBDE in the tissues of mice, chickens, ducks, frogs and fish ranged 0.45-206, 0.06-18.8, 1.83-112, 2.75-108, and 0.02-32.0 ng/g wet weight, respectively. Preferential distribution in the liver and muscle relative to the brain was observed for PBDEs in mice, chickens, ducks and frogs...
November 2016: Environmental Pollution
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