Read by QxMD icon Read


Anber Naqvi, Abdul Qadir, Adeel Mahmood, Mujtaba Baqar, Iqra Aslam, Farhan Sajid, Mehvish Mumtaz, Jun Li, Gan Zhang
The present study biomonitored the placental polychlorinated biphenyl (PCB) concentrations in women from Punjab Province, Pakistan, that provides the pioneer data for occurrence and body burden of PCBs in placental tissues from South Asian women. The ∑34 PCB concentrations in placental tissues were ranged from 20.2 to 115.98 ng/g lipid weight (lip. wt.), with predominance of tetra-PCB (54.67%). The levels of ∑8 DL-PCBs and ∑6 -indicator PCBs were ranged from 2.03 to 27.64 ng/g (lip. wt.) and 1.71 to 30...
March 11, 2018: Environmental Science and Pollution Research International
Jie Luo, Jian Wu, Siyuan Huo, Shihua Qi, Xiaowen Sophie Gu
The combined utilization of direct or alternating electric fields and phytoremediation was designed to decontaminate multi-metal polluted soil at a field scale e-waste recycling impacted site. Eucalyptus globulus was chosen for metal purification for its resilient and unpalatable nature. Biomass production, metal concentration and water use efficiency of the species under direct current (DC) and alternating current (AC) fields with various voltages were investigated. DC and AC fields stimulated the growth of the plant, except for DC field with high voltage (10 V)...
March 5, 2018: Chemosphere
R Di Maio, S Fais, P Ligas, E Piegari, R Raga, R Cossu
As it is well-known, the characterization plan of an old landfill site is the first stage of the project for the treatment and reclamation of contaminated lands. It is a preliminary in-situ study, with collection of data related to pollution phenomena, and is aimed at defining the physical properties and the geometry of fill materials as well as the possible migration paths of pollutants to the surrounding environmental targets (subsoil and groundwater). To properly evaluate the extent and potential for subsoil contamination, waste volume and possible leachate emissions from the landfill have to be assessed...
March 7, 2018: Waste Management
Yafei Shen, Xingming Chen, Xinlei Ge, Mindong Chen
This work studied the disposal of the non-metallic fraction from waste printed circuit board (NMF-WPCB) via the chemical pretreatments followed by pyrolysis. As a main heavy metal, the metallic Cu could be significantly removed by 92.4% using the HCl leaching process. Subsequently, the organic-Br in the brominated flame retardants (BFRs) plastics could be converted into HBr by pyrolysis. The alkali pretreatment was benefit for the Br fixation in the solid char. The Br fixation efficiency could reach up to 53...
March 5, 2018: Journal of Environmental Management
Jiehong Guo, William A Stubbings, Kevin Romanak, Linh V Nguyen, Liisa Jantunen, Lisa Melymuk, Victoria Arrandale, Miriam L Diamond, Marta Venier
A high molecular weight compound, 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine (TTBP-TAZ), was detected during the analysis of brominated flame retardants in dust samples collected from an electrical and electronic waste (e-waste) recycling facility in Ontario, Canada. Gas chromatography coupled with both high-resolution and low-resolution mass spectrometry (MS) was used to determine TTBP-TAZ's chemical structure and concentrations. To date, TTBP-TAZ has only been detected in plastic casings of electrical and electronic equipment and house dust from The Netherlands...
March 6, 2018: Environmental Science & Technology
Xiao Yan, Xiaobo Zheng, Meihuan Wang, Jing Zheng, Rongfa Xu, Xi Zhuang, Ying Lin, Mingzhong Ren
Urinary metabolites of phosphate flame retardants (PFRs) were determined in workers from an electronic waste (e-waste) recycling site and an incineration plant, in order to assess the PFR exposure risks of workers occupied with e-waste recycling and incineration. Bis(2-chloroethyl) phosphate (BCEP), bis(1,3-dichloro-2-propyl) phosphate (BDCIPP), and diphenyl phosphate (DPHP) were the most frequently detected chemicals (82-93%). The median concentrations of BCEP, BDCIPP, and DPHP were 1.77, 0.23, and 0.70 ng/mL, and 1...
February 26, 2018: Chemosphere
Abhishek Kumar Awasthi, Jinhui Li
The generation of e-waste has increased significantly in India, and the informal recycling of e-waste has adverse effects on environment and public health. In this article, the E-waste management is evaluated in accordance from the resident's awareness perspective in Bangalore city, India. The survey data revealed that about 58% male and 42% female responded and 35% of the participants belong to age range between 18 and 25 years. About 60% of respondent's education level was either graduate or post graduate, 27% high school to higher school, 10% higher educated (> post graduate), and 3% primary to middle...
March 3, 2018: Environmental Science and Pollution Research International
Ramendra Pal, Subhas C Kundu, Vamsi K Yadavalli
Flexible and thin-film devices are of great interest in epidermal and implantable bioelectronics. The integration of energy storage and delivery devices such as supercapacitors (SCs) with properties of flexibility, miniaturization, biocompatibility, and degradability are sought for such systems. Reducing e-waste, and using sustainable materials and processes are additional desirable qualities. Herein, a silk protein-based biocompatible and degradable thin film micro-supercapacitor (µSC) is reported. A protein carrier with the conducting polymer PEDOT:PSS and reduced graphene oxide dopant, is used as a photopatternable biocomposite ink...
February 26, 2018: ACS Applied Materials & Interfaces
Zhineng Wu, Miaomiao Xie, Yao Li, Guanghai Gao, Mark Bartlam, Yingying Wang
Polybrominated diphenyl ethers (PBDEs) have become widespread environmental pollutants all over the world. A newly isolated bacterium from an e-waste recycling area, Stenotrophomonas sp. strain WZN-1, can degrade decabromodiphenyl ether (BDE 209) effectively under aerobic conditions. Orthogonal test results showed that the optimum conditions for BDE 209 biodegradation were pH 5, 25 °C, 0.5% salinity, 150 mL minimal salt medium volume. Under the optimized condition, strain WZN-1 could degrade 55.15% of 65 μg/L BDE 209 under aerobic condition within 30 day incubation...
February 24, 2018: AMB Express
Na Li, Xun-Wen Chen, Wen-Jing Deng, John P Giesy, Hai-Long Zheng
Polybrominated diphenyl ethers (PBDEs, tri-to hepta-BDEs) and Dechlorane Plus (DP) in multiple samples (soil, sediment, road dust, and PM2.5 particles) in historical locations of our previous work in Guiyu (electronic-waste recycling town) in southeastern China were investigated in 2014. Ten years later, PBDEs and DP were detected in 100% of the samples. Ʃ3-7 PBDEs were still relatively great, ranging from 1.2 × 101 to 2.1 × 103 ng/g dry weight (dw) in soil, 2.1 to 3.2 × 103 ng/g dw in sediment, 1.0 × 101 to 1...
February 13, 2018: Chemosphere
Anshu Priya, Subrata Hait
Comprehensive characterization of printed circuit board (PCB) of end-of-life electrical and electronic equipment (EEE) is obligatory for prospective profitable beneficiation. In this study, beneficiation oriented comprehensive characterization of two brands of PCBs each of 16 end-of-life EEE was conducted in terms of their physicochemical characteristics with special emphasis on the content of 16 general elements, 2 precious metals and 15 rare earth elements (REEs). General elements and their highest weight percent composition found in different PCBs of the EEEs were Cu (23% in laptop), Al (6% in computer), Pb (15% in DVD player) and Ba (7% in TV)...
February 14, 2018: Waste Management
Seelawut Damrongsiri
The change in environmental conditions during the transportation of contaminated soil and sediment was expected to affect the transformation of heavy metal fractionation. This study disclosed the serious contamination of copper (Cu), lead (Pb), and zinc (Zn) in the sewer sediment of an e-waste dismantling community in Thailand which may be caused by flushed contaminated soil and e-waste fragments. Two environmental conditions were simulated to observe the transformation of heavy metal fractionation. The anoxic sewer condition was induced using high substrate and sulfate in a closed container...
February 14, 2018: Environmental Science and Pollution Research International
Daqian Jiang, Wei-Qiang Chen, Xianlai Zeng, Linbin Tang
Bisphenol A (BPA), a synthetic organic chemical, is creating a new category of ecological and human health challenges due to unintended leakage. Effectively managing the use and leakage of BPA can benefit from an understanding of the anthropogenic BPA cycle (i.e., the size of BPA flows and stocks). In this work, we provide a dynamic analysis of the anthropogenic BPA cycle in China for 2000-2014. We find that China's BPA inflows haveconsumption has increased 10-fold since 2000, to approximately ~3 million tonnes/year...
February 13, 2018: Environmental Science & Technology
Anil Kumar, Harvinder Singh Saini, Sudhir Kumar
Two-step bioleaching was applied using a cyanogenic bacterium Pseudomonas balearica SAE1 to recover gold (Au) and silver (Ag) from the computer printed circuit boards (CPCBs) via central composite design of a response surface methodology (CCD-RSM). To enhance Au and Ag recovery, factors like pH level, pulp density, temperature and glycine concentration were optimized and their interactions were studied. CCD-RSM optimization resulted in 73.9 and 41.6% dissolution of Au and Ag, respectively, at initial pH 8.6, pulp density 5 g/L, temperature 31...
February 2018: 3 Biotech
Yun-Jiang Yu, Bi-Gui Lin, Wei-Bo Liang, Liang-Zhong Li, Yu-de Hong, Xi-Chao Chen, Xing-Yu Xu, Ming-Deng Xiang, Shan Huang
Previous studies have confirmed that house dust is one of the main sources of polybrominated diphenyl ethers (PBDEs) exposure, and also indicated that PBDEs might affect human semen quality. The aim of this study was to explore the association between PBDEs concentration in house dust and the semen quality of male resident. Results showed that the semen qualities of the residents living around the e-waste dismantling workshops for a long time (3-17years) at the e-waste areas in South China significantly decreased, and the DNA damage of sperms were aggravated...
February 2, 2018: Chemosphere
Runxia Sun, Xiaojun Luo, Xiaobo Zheng, Kun Cao, Pingan Peng, Qing X Li, Bixian Mai
Hexabromocyclododecanes (HBCDs) are flame retardants and emerging persistent organic pollutants. In the present study, α-, β-, and γ-HBCDs were measured in several fish species from rivers and an electronic waste (e-waste) recycling site in Pearl River Delta, South China. The concentrations of HBCDs were 12.8 to 640, 5.90 to 115, and 34.3 to 518ng/g lipid weight (lw) in mud carp (Cirrhinus molitorella), tilapia (Tilapia nilotica), and plecostomus (Hypostomus plecostomus), respectively. Plecostomus showed the highest HBCD concentrations among three fish species...
January 2018: Marine Pollution Bulletin
Jie Luo, Mei He, Shihua Qi, Jian Wu, Xiaowen Sophie Gu
The phytoremediation efficiency of multi-metal-polluted sites in an electronic waste recycling town by Eucalyptus globulus was evaluated through a series of 2-year field experiments. Different initial planting densities (2500, 5000, and 10,000 plants per ha), coppice rotations, and harvesting position (5 or 30 cm above the ground) protocols were designed to improve the remediation potential of the species. There were unnoticeable variations in metal concentrations and distribution characteristics in plant tissues in a low and medium planting-density field during the experimental period...
February 7, 2018: Environmental Science and Pollution Research International
Xingchun Jiao, Yongxiao Wang, Shu Chen, Jiuchen Liu, Qin Tian, Lisheng Hou, Guohui Lu, Yongliang Yang
To investigate the concentration and congener patterns of polybrominated diphenyl ethers (PBDE) in outdoor air from farmland area, air samples were collected using passive and active sample methods from April to November 2012, in an e-waste dismantling town in the Guangzhou region of South China. The sum of gaseous and particulate PBDE concentrations averaged 74.26 pg/m3 and ranged between 3.24 and 247.30 pg/m3, while the mean gaseous and particulate PBDEs were 19.20 and 55.07 pg/m3, respectively. The PBDE level was comparable to those in urban air of non-electric waste areas, but much lower than those in both indoor and outdoor air of e-waste dismantling workshop area...
January 27, 2018: Bulletin of Environmental Contamination and Toxicology
Mengke Song, Zhineng Cheng, Chunling Luo, Longfei Jiang, Dayi Zhang, Hua Yin, Gan Zhang
We performed the study of rhizospheric effects on soil microbial community structure, including bacteria, fungi, actinomycete, and archaea, at an electronic waste (e-waste) recycling site by analyzing the phospholipid fatty acid (PLFA) and isoprenoid glycerol dialkyl glycerol tetraether (GDGT) contents. By comparing PLFA and isoprenoid GDGT profiles of rhizospheric and surrounding bulk soils of 11 crop species, we observed distinct microbial community structures. The total PLFA concentration was significantly higher in rhizospheric soils than in non-rhizospheric soils, whereas no obvious difference was found in the total isoprenoid GDGT concentrations...
January 26, 2018: Environmental Science and Pollution Research International
Wei Han, Guanghai Gao, Jinyao Geng, Yao Li, Yingying Wang
Ziya Circular Economy Park is the biggest e-waste recycle park in North China before 2011, its function was then transformed in response to regulations and rules. In this paper, investigation was conducted to research the residual concentrations of 14 analytes (12 heavy metals and 2 non-metals) in the surface soil of Ziya Circular Economy Park and surrounding area. Both ecological and health assessments were evaluated using GI (geo-accumulation index) and NPI (Nemerow pollution index), and associated health risk was assessed by using USEPA model...
January 12, 2018: Chemosphere
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"