Abstract
Pollution from electronic-waste (E-waste) dismantling is of great concern. This study investigated the concentrations of polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), and polybrominated diphenyl ethers (PBDEs) in 253 cropland soil samples around an abandoned E-waste dismantling site in Taizhou city, Zhejiang province in China, using an analytical method which simultaneously extracted, purified and determined the identity and quantity of the three types of persistent organic pollutants. Meanwhile, their spatial distributions, pollution characteristics, and risk assessments were further analyzed. Total PCBs in the test soils ranged from below method detection limits (ND) to 2985.25 μg kg−1 on a dry weight basis (d.w.), and the spatial distribution indicated a “hot spot” of PCBs pollution in the study area. The PAHs were detected in all samples with total concentrations ranging from 4.99 to 2723.06 μg kg−1 d.w. The distribution of PBDEs showed the pollution characteristics of “family-run workshops”, with a total content range of ND ~ 899.34 μg kg−1 d.w., of which BDE209 was typically the dominant congener, accounting for 74.05% of the total PBDEs content in the test soils, with the highest content reaching 857.72 μg kg−1 d.w. Results showed that the ecological and lifetime carcinogenic risks of PCBs and PAHs were low in the study area, but the health risk caused by oral ingestion and dermal contact accounted for the highest proportion of the total exposure risks, while inhalation could be ignored. PBDEs in soils of the study area were a potential chronic non-carcinogenic risk, particularly for children. Therefore, in order to protect human health and environment, it is necessary to regulate the management of E-waste dismantling sites and pollution control.
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This research was supported by National Key Research and Development Program of China (No. 2019YFC1803704) and the National Natural Science Foundation of China (42277006, 41771344).
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YZ: Investigation, methodology, validation, data curation, writing—original draft. HZ: Methodology, validation. KY: Methodology. QY: Methodology. SZ: Review and editing. YW: Methodology. FC: Methodology. JC: Resources. JX: Review and editing. HW: Conceptualization, writing—review and editing, supervision, funding acquisition.
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Zhang, Y., Zhang, H., Yan, K. et al. The Spatial Distribution and Potential Risk Assessment of POPs in Farmland around a Typical E-Waste Dismantling Site. Arch Environ Contam Toxicol 84, 453–465 (2023). https://doi.org/10.1007/s00244-023-01000-6
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DOI: https://doi.org/10.1007/s00244-023-01000-6