Organohalogen pollutants in surface particulates from workshop floors of four major e-waste recycling sites in China and implications for emission lists

Zeng, Yan-Hong; Tang, Bin; Luo, Xiao-Jun; Zheng, Xiaobo; Peng, Ping’an; Mai, Bi-Xian

doi:10.1016/j.scitotenv.2016.06.053

Cited by 36 publications

(16 citation statements)

References 30 publications

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“…The measured ∑ 34 FBAs in LCD dust were higher than the previously reported e-waste dust concentrations of polychlorinated biphenyls (range: 300−180,000 ng/g), 32 organophosphate triesters (range: 1160−61,500 ng/g with a median of 9890 ng/g), 33 phenolic antioxidants (range: 2970−14,300 ng/ g with a median of 5260 ng/g), 34 and ultraviolet filters (range: 790−179,000 ng/g with a median of 2060 ng/g). 34 However, they were roughly comparable to the reported e-waste dust concentrations of polybrominated diphenyl ethers (130− 1,100,000 ng/g) and several alternative flame retardants (160−320,000 ng/g).…”

Section: ■ Results and Discussioncontrasting

confidence: 66%

Identification of Environmental Liquid-Crystal Monomers: A Class of New Persistent Organic Pollutants—Fluorinated Biphenyls and Analogues—Emitted from E-Waste Dismantling

Zhu

Shen

Liang

et al. 2021

Environ. Sci. Technol.

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Liquid-crystal monomers (LCMs), especially fluorinated biphenyls and analogues (FBAs), are considered to be a new generation of persistent, bioaccumulative, and toxic organic pollutants, but their emissions from liquid-crystal display (LCD)-associated e-waste dismantling remain unknown. To fill this knowledge gap, a broad range of 46 LCMs, including 39 FBAs and 7 biphenyls/bicyclohexyls and analogues (BAs), were investigated by a dedicated target analysis in e-waste dust samples. Of 39 target FBAs, 34 were detected in LCD dismantlingassociated dust. Among these 34 detectable FBAs, 9 were detected in 100% of the samples and 25 were frequently detected in >50% of the samples. The total concentrations of these 34 FBAs (∑ 34 FBAs) detected in LCD e-waste dust were in the range of 225−976,000 (median: 18,500) ng/g, significantly higher than those in non-LCD e-waste dust (range: 292−18,500, median: 2300 ng/g). In addition to FBAs, six of seven BAs were also frequently detected in LCD e-waste dust with total concentrations (∑ 6 BAs) of 29.8−269,000 (median: 3470) ng/g. Very strong and significant correlations (P < 0.01) were identified in all frequently detected LCMs, indicating their common applications and similar sources. Our findings demonstrate that e-waste dismantling contributes elevated emissions of FBAs and BAs to the ambient environment.

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Section: ■ Results and Discussioncontrasting

confidence: 66%

Identification of Environmental Liquid-Crystal Monomers: A Class of New Persistent Organic Pollutants—Fluorinated Biphenyls and Analogues—Emitted from E-Waste Dismantling

Zhu

Shen

Liang

et al. 2021

Environ. Sci. Technol.

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“…PCBs are highly persistent and ubiquitous pollutants (Safe, 1994). Among the 209 individual PCB congeners, the ortho -substituted congeners constitute a large portion of the PCB residues observed in the environment and in human and animal tissue (Zeng et al , 2016). Among these, PCB153 (2,2′,4,4′,5,5′-hexachlorobiphenyl), a di- ortho substituted, non-dioxin-like congener, is reported to be the most abundant congener in human tissues (Rylander et al , 1998).…”

Section: Introductionmentioning

confidence: 99%

PCB95 and PCB153 change dopamine levels and turn-over in PC12 cells

et al. 2018

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Polychlorinated biphenyls (PCB) exposure at low chronic levels is a significant public health concern. Animal and epidemiological studies indicate that low PCB body burden may cause neurotoxicity and be a risk factor for neurodegenerative diseases. In the current study, we measured the ability of two non-dioxin like PCBs, 2,2',4,4',5,5'-hexachlorobiphenyl (PCB153) and 2,2'3,5',6-pentachlorobiphenyl (PCB95), to alter dopamine (DA) levels and metabolism using the dopaminergic PC12 cell line. Our hypothesis is that treatment of PC12 cells with non-toxic concentrations of PCB153 or PCB95 for 12 and 24 h will have different effects due to different congener structures. Levels of DA and of 3,4-dihydroxyphenylacetaldehyde (DOPAL), 3, 4-dihyroxylphenylethanol (DOPET), and 3,4-dihyroxylphenylacetic acid (DOPAC) metabolite, gene expression of the dopamine synthesis enzyme tyrosine hydroxylase (TH) and the vesicular monoamine transporter (VMAT2), and gene expression of the anti-oxidant enzymes Cu/Zn and Mn superoxide oxidase (Cu/ZnSOD, MnSOD), glutathione peroxidase (GPx) and catalase were determined. PCB153 decreased intracellular and extracellular levels of DA after 12 h exposure and this was consistent with an increase in DA metabolites. After 24 h, the level of DA in medium increased compared to the control. In contrast, PCB95 exposure increased the intracellular DA level and decreased DA in medium consistent with a down-regulation of VMAT2 expression at 12 h. After 24 h exposure, PCB95 increased DA levels in media. Expression of TH mRNA increased slightly following 12 h but not at 24 h exposure. MnSOD mRNA increased up to 6-7 fold and Cu/ZnSOD increased less than two-fold after treatment with both congeners. Catalase expression was up-regulated following 24 h exposure to PCB153 and PCB95, but GPx expression was down-regulated after 12 h exposure to PCB95 only. These results suggest that PCB153 and PCB95 are neurotoxic and affect DA turnover with structure-dependent differences between these two congeners.

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“…Several studies have revealed the existence of DP, Dec602, and anti-Cl 11 -DP in the living beings from Taizhou (Ben et al, 2013(Ben et al, , 2014Li et al, 2014;Wu et al, 2016). DP was also detected in the air (Sun et al, 2017) and in the floor particles of several e-waste recycling workshops in Taizhou (Zeng et al, 2016). However, little is known on the occurrence, spatial distribution, and sources of DP and its structurally related compounds in Taizhou's water environment.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution and implications to sources of halogenated flame retardants in riverine sediments of Taizhou, an intense e-waste recycling area in eastern China

Zhou

et al. 2017

Chemosphere

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Concentrations and spatial distribution pattern of organohalogen flame retardants were investigated in the riverine surface sediments from Taizhou, an intensive e-waste recycling region in China. The analytes were syn- and anti- Dechlorane Plus (DP), Dechloranes 602, 603, and 604, a DP monoadduct, two dechlorinated DPs and 8 congeners of polybrominated diphenyl ethers (PBDEs). The concentrations of ΣPBDEs, ΣDP, ΣDec600s, and ΣDP-degradates ranged from <100 to 172,000, 100 to 55,000, not detectable (nd) to 1600, and nd to 2800 pg/g dry weight, respectively. BDE-209 and DP, both have been manufactured in China, had similar spatial distribution patterns in the study area, featured by distinctly recognizable hotspots some of which are in proximity to known e-waste dumping or metal recycling facilities. Such patterns were largely shared by Dec602 and dechlorinated DP, although their concentration levels were much lower. These major flame retardants significantly correlate with each other, and cluster together in the loading plot of principle component analysis. In contrast, most non-deca PBDE congeners do not correlate with DPs. Dec604 stood out having distinctly different spatial distribution pattern, which could be linked to historical use of mirex. Organic matter content of the sediment was not the dominant factor in determining the spatial pattern of pollution by halogenated flame retardants in the rivers of this study.

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Organohalogen pollutants in surface particulates from workshop floors of four major e-waste recycling sites in China and implications for emission lists

Cited by 36 publications

References 30 publications

Identification of Environmental Liquid-Crystal Monomers: A Class of New Persistent Organic Pollutants—Fluorinated Biphenyls and Analogues—Emitted from E-Waste Dismantling

Identification of Environmental Liquid-Crystal Monomers: A Class of New Persistent Organic Pollutants—Fluorinated Biphenyls and Analogues—Emitted from E-Waste Dismantling

PCB95 and PCB153 change dopamine levels and turn-over in PC12 cells

Spatial distribution and implications to sources of halogenated flame retardants in riverine sediments of Taizhou, an intense e-waste recycling area in eastern China

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