Evidence for the transfer of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans from soil into biota

Zhao, Xingru; Zheng, Minghui; Zhang, Bing; Zhang, Qinghua; Liu, Wenbin

doi:10.1016/j.scitotenv.2006.02.027

Cited by 55 publications

(26 citation statements)

References 25 publications

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“…CB-118 was the most abundant congener among the dl-PCBs for many thermal related sources, environmental matrices and biological samples (Kim et Zhao et al, 2006;Çok et al, 2007;Srogi, 2008). In this study, the concentration of CB-118 was also the highest one, followed by CB-105, CB-123, CB-156 and CB-77.…”

Section: Resultssupporting

confidence: 50%

A preliminary investigation on emission of polychlorinated dibenzo-p-dioxins/dibenzofurans and dioxin-like polychlorinated biphenyls from coke plants in China

Liu

et al. 2009

Chemosphere

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a b s t r a c tThermal related processes are widely recognized as the main sources of formation and emission of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs). It is well known that, carbonization of coal in coke production involves many thermal reactions at high-temperature. However, there are still no strong evidences to identify coking processes as source of PCDD/Fs and PCBs. In this study, coke production was qualified and quantified for emission of PCDD/Fs and dioxin-like PCBs (dl-PCBs) in some typical coke plants in China. In the preliminary investigation, stack gases from three typical coke plants were collected, and dl-PCBs and 2378-substituted PCDD/Fs were analyzed by isotope dilution HRGC/HRMS technique. The total toxic equivalents of dl-PCBs and PCDD/Fs were in the range of 1.6-1785.4 pg WHO-TEQ Nm À3 . For dl-PCBs, the most abundant congener was CB-118, and the most dominant contributor to total WHO-TEQ of dl-PCBs was CB-126. With regard to PCDD/Fs, four congeners comprised of OCDD, 1234678-HpCDD, 1234678-HpCDF and OCDF were the predominant species in stack gases. Further investigation on the emission of dioxins from coking industry is still in process.

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Section: Resultssupporting

confidence: 50%

A preliminary investigation on emission of polychlorinated dibenzo-p-dioxins/dibenzofurans and dioxin-like polychlorinated biphenyls from coke plants in China

Liu

et al. 2009

Chemosphere

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“…The PCB levels were one to two orders of magnitude higher than those obtained from some other areas in China, such as Beijing, Shenyang, Hong Kong, and Tibet Zhang et al, 2007). The levels were comparable to those found at a site for dismantling PCBcontaining equipment in Taizhou (Zhao et al, 2006b), and at the open-burning site in Guiyu (Wong et al, 2007b). However, they were lower than those detected at some heavily polluted sites (Priha et al, 2005;Herrick et al, 2007;Turrio-Baldassarri et al, 2007).…”

Section: Pcbsmentioning

confidence: 48%

“…There were some simple household e-waste recycling workshops dealing with the disposal of electric power capacitors or transformers which contained PCBs. Previous studies also reported the presence of lower chlorinated PCB congeners in soils collected from the vicinity of an illegal trading and dismantling site for PCB-containing equipment in this area (Zhao et al, 2006b). These results suggested that the major source of farmland soil PCBs in this area might be atmospheric transportation and deposition of less chlorinated PCBs such as Aroclor 1242 and 1254, which have higher proportions of tri-through hexa-CB congeners.…”

Section: Pcbsmentioning

confidence: 59%

Dioxin-like compounds in agricultural soils near e-waste recycling sites from Taizhou area, China: Chemical and bioanalytical characterization

Shen

Chen

Huang

et al. 2009

Environment International

152

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“…The potentially hazardous recycling processes in Taizhou included the unprotected manual removal of printer cartridge toner, the open burning of wires and printed wiring boards to recover metals, the dismantling of electric power appliances, and the use of strong acid baths to retrieve gold from chips and other components ( Figure S1, Supporting Information). These unregulated salvaging operations and optional dumping of the residual waste have resulted in severe pollution (6). Accordingly, there is a large data gap surrounding how the environment is influenced by the growing e-waste recycling industry.…”

Section: Introductionmentioning

confidence: 99%

Identification of Ah Receptor Agonists in Soil of E-waste Recycling Sites from Taizhou Area in China

Shen

Huang

Wang

et al. 2007

Environ. Sci. Technol.

117

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In recent years, increasing concern has surrounded the consequences of improper electric and electronic waste (ewaste) disposal. In order to mitigate or remediate the potentially severe toxic effects of e-waste recycling on the environment, organisms, and humans, many contaminated sites must first be well-characterized. In this study, soil samples were taken from Taizhou city, one of the largest e-waste disposal centers in China, which was involved in recycling for nearly 30 years. The extracts of the samples were assayed for aryl hydrocarbon receptor (AhR)-mediated ethoxyresorufin-Odeethylase (EROD) induction in the rat hepatoma cell line H4IIE. Some of the target AhR agonists, including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs), were instrumentally analyzed as well. The cause-effect relationship and dose-response relationship between the chemical concentrations of AhR agonists and observed EROD activity were examined. The results showed that soil extracts could induce AhR activity significantly, and the chemically derived 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) equivalents (TEQ cal ) were perfectly correlated to bioassay-derived TCDD equivalents (TEQ bio ; R ) 0.96, P < 0.001), which indicated that the known AhR agonists could account for the observed responses. Among different contributors, PCBs accounted for 87.2-98.2% and PCDD/Fs contributed 1.7-11.6% of TEQ cal , while the contribution of PAHs could almost be neglected. Under these conditions, a quantitative dose-effect relationship between TEQ PCB and EROD activity could be evaluated, suggesting that the observed AhR effect was mainly caused by PCBs. Further source identification by congener profiles analysis showed that the crude dismantling of electric power devices and open burning of electric wires and printed circuit boards may be the main sources of these dioxin-like compounds. This study suggests that the combination of in vitro bioassay and chemical analysis is useful to screen, identify, and prioritize AhR agonists in soil from e-waste recycling areas.

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Evidence for the transfer of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans from soil into biota

Cited by 55 publications

References 25 publications

A preliminary investigation on emission of polychlorinated dibenzo-p-dioxins/dibenzofurans and dioxin-like polychlorinated biphenyls from coke plants in China

A preliminary investigation on emission of polychlorinated dibenzo-p-dioxins/dibenzofurans and dioxin-like polychlorinated biphenyls from coke plants in China

Dioxin-like compounds in agricultural soils near e-waste recycling sites from Taizhou area, China: Chemical and bioanalytical characterization

Identification of Ah Receptor Agonists in Soil of E-waste Recycling Sites from Taizhou Area in China

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