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

Shen, Chaofeng; Chen, Yingxu; Huang, Shuo; Wang, Zijian; Yu, Chunna; Qiao, Mingqiang; Xu, Yiping; Setty, Karen; Zhang, Jianying; Zhu, Yanhui; Qiu, Lin

doi:10.1016/j.envint.2008.07.005

Cited by 162 publications

(89 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…CB-126 was the major contributor to the P TEQs of the PCBs (>90%). This result is similar to those reported by Bi et al 18 and Shen et al 19 in this area.…”

Section: The General Distribution Of Pcbs Pcdd/fs and Pbdessupporting

confidence: 93%

“…The concentrations are comparable to those found in the agricultural soils of Guiyu in South China 16,20 and the results from Taiwan. 21 However, they were lower than those reported by Kobayashi et al 22 and Seike et al 23 in Japanese paddy soils, as well as in Korean soils as reported by Im et al 24 and Kim et al 25 Congener 19 in the same region, and was also comparable to the PCDD/Fs distribution in the soils of Guiyu, 16,20 suggesting a common source of PCDD/Fs emission involving combustion of E-waste in the E-waste areas.…”

Section: The General Distribution Of Pcbs Pcdd/fs and Pbdesmentioning

confidence: 76%

“…Generally, PCB levels showed a decreasing tendency over the sampling period of seven years. The mean concentrations of the sum of 19 15 observed that the concentration in soils was up to 1100 ng g À1 dw in 1993. However, the PCB levels in this study are comparable to those reported by Liu et al 16 and Leung et al 17 in the soils from Guiyu, another major E-waste dismantling area in South China.…”

Section: The General Distribution Of Pcbs Pcdd/fs and Pbdesmentioning

confidence: 99%

“…These levels were lower than those reported in the Guiyu area. Leung et al 20 indicated that PBDE concentrations in the surface soils from Guiyu ranged from 34.7 to 4250 ng g À1 dw; Liu et al 16 reported that the concentrations of P 19 PBDEs were in the range 0.40-789.49 ng g À1 dw. Additionally, an investigation from Qingyuan, an E-waste dismantling area near Guiyu, showed that the total PBDE concentrations ranged from 191 to 9156 ng g À1 dw in road soils and from 2.9 to 207 ng g À1 dw in farmland soils, 26 which was up to two orders of magnitude higher than the present results for Taizhou.…”

Section: The General Distribution Of Pcbs Pcdd/fs and Pbdesmentioning

confidence: 99%

See 3 more Smart Citations

Temporal trends of PCBs, PCDD/Fs and PBDEs in soils from an E-waste dismantling area in East China

Wang

Zhang

et al. 2013

Environ. Sci.: Processes Impacts

View full text Add to dashboard Cite

The temporal trends of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polybrominated diphenyl ethers (PBDEs) were investigated in soils from an E-waste dismantling area in East China between 2005 and 2011. Isotope dilution high resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS) was employed for the sample analysis. PCB levels declined as expected, while PCDD/Fs generally remained at a constant level during the sampling period, and PBDE concentrations tended to be slightly lower after 2007 although the decline was not statistically significant. The congener profiles indicated that lowly-halogenated congeners of these persistent organic pollutants (POPs) accounted for the decreasing levels and relative proportions of the POPs, suggesting that they have been gradually eliminated from the field soil over the years. However, the concentration levels of some heavy congeners (e.g., OCDD and OCDF) showed different trends from those of the lighter ones. The general tendencies of the three types of POPs in soils were consistent with those reported in other studies in this area. The results implied that the enhanced regulations and centralized dismantling action introduced in 2005 might exert a limited influence on these three types of POPs in soils during the sampling period. Environmental impactThe environmental contamination associated with E-waste dismantling activities has been a topic of great concern during the past several decades. In China, two notorious E-waste recycling centers are hot spots for POPs research, which are respectively located in Guiyu, South China and Taizhou, East China. The present study was conducted to investigate the levels and distribution of PCBs, PCDD/Fs and PBDEs in soils from the Taizhou area to reect the temporal tendency of POPs aer stricter environmental regulations were introduced by local government in 2005. The results revealed that different temporal trends occurred for the different POPs, which were closely related to their historical emission and their chemical properties. The study will shed light on the contamination control for these POPs in E-waste dismantling areas.

show abstract

“…CB-126 was the major contributor to the P TEQs of the PCBs (>90%). This result is similar to those reported by Bi et al 18 and Shen et al 19 in this area.…”

Section: The General Distribution Of Pcbs Pcdd/fs and Pbdessupporting

confidence: 93%

Section: The General Distribution Of Pcbs Pcdd/fs and Pbdesmentioning

confidence: 76%

Section: The General Distribution Of Pcbs Pcdd/fs and Pbdesmentioning

confidence: 99%

Section: The General Distribution Of Pcbs Pcdd/fs and Pbdesmentioning

confidence: 99%

See 2 more Smart Citations

Temporal trends of PCBs, PCDD/Fs and PBDEs in soils from an E-waste dismantling area in East China

Wang

Zhang

et al. 2013

Environ. Sci.: Processes Impacts

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the industrial structure in Shandong was not balanced, and backward production facilities, which are prone to high emission levels, still dominated much in many heavy polluting sectors in the years studied (GSD, 2011a). Many studies of PCDD/F concentration in sediments and mussels from coastal sea (Pan et al, 2008), in human milk (Sun et al, 2010), in marine and lacustrine sediments (Pan et al, 2010), and in shell fish (Shen et al, 2009) reveal that Shandong has suffered from high levels of PCDD/F pollutions for many years. As a province with the 2nd longest coastline in China and located close to South Korea (across the Yellow Sea), POP concentrations in this region have become a hot topic (Naile et al, 2011).…”

Section: Study Areamentioning

confidence: 99%

Factors influencing polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD/F) emissions and control in major industrial sectors: Case evidence from Shandong Province, China

Wang

Lü

et al. 2014

Journal of Environmental Sciences

View full text Add to dashboard Cite

show abstract

Polychlorinated Biphenyls Attenuation in Soil from E‐Waste Recycling Area under Flooded and Dryland Conditions

Chen

Yang

et al. 2014

CLEAN Soil Air Water

View full text Add to dashboard Cite

The environmental pollution and health risks caused by the improper disposal of electric and electronic waste (e‐waste) have become urgent global issues. Severe and widespread contaminations of polychlorinated biphenyls (PCBs) are commonly found in drylands or paddy fields in Taizhou, a major hotspot of e‐waste recycling in China. In this research, comparative study was performed on PCBs transformation in polluted agricultural soil under drying and flooded conditions. Uncontaminated soils spiked with PCB31 (2,3,4′‐trichlorobiphenyl) and PCB153 (2,2′,4,4′,5,5′‐hexachlorobiphenyl) were also investigated to verify the transformation characteristics of highly and less chlorinated congeners under both conditions. In a 180‐day incubation period, total PCBs in contaminated soil decreased 63.85% in paddy conditions but only 33.10% in dryland conditions; dissipation rate of highly chlorinated congeners in flooded treatment was 39% higher than drying treatment. Furthermore, PCB153 spiked soil exhibited a 19% higher removal rate in flooded conditions than drying ones. In contrast, degradation rate of PCB31 under drying conditions was 33% higher. It was proposed that drying conditions in dryland or fallowed paddy field favoured the aerobic biodegradation of less chlorinated PCBs, whereas paddy conditions benefitted anaerobic reductive dechlorination process of highly chlorinated congeners, which was crucial for completely mineralization of PCBs.

show abstract

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

Cited by 162 publications

References 49 publications

Temporal trends of PCBs, PCDD/Fs and PBDEs in soils from an E-waste dismantling area in East China

Temporal trends of PCBs, PCDD/Fs and PBDEs in soils from an E-waste dismantling area in East China

Factors influencing polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD/F) emissions and control in major industrial sectors: Case evidence from Shandong Province, China

Polychlorinated Biphenyls Attenuation in Soil from E‐Waste Recycling Area under Flooded and Dryland Conditions

Contact Info

Product

Resources

About