Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Ecotoxicol Environ Saf. 2019 Jan 15;167:467-475. doi: 10.1016/j.ecoenv.2018.10.029. Epub 2018 Oct 24.
Polybrominated diphenyl ethers (PBDEs) are widespread persistent organic pollutants (POPs) because of their extensive use in diverse electronic products, which have posed great threats to human health and ecosystem. In this study, a total of 54 soil samples were collected from an e-waste recycling area in Tianjin, northern China for analyzing the occurrence and distribution of 14 PBDE congeners. The concentrations of BDE 209, ∑PBDEs and ∑PBDEs in the soils from Ziya e-waste recycling area were 2.9-2666 ng/g dw (dry weight) (average 90 ng/g dw), 3.0-41 ng/g dw (average 13 ng/g dw) and 5.9-2699 ng/g dw (average 103 ng/g dw), respectively. The ∑PBDEs concentration showed a dramatic decrease from the central area to the surrounding area. Generally, PBDEs in the northern part showed higher levels than the southern part of the e-waste recycling area due to the wind direction in Tianjin. Deep soil was less polluted by PBDEs, which largely comes from the deposition, migration and infiltration of PBDEs in the surface soils. Overall, PBDEs level in the studied area was much lower than some typical e-waste recycling areas in south China, such as Guiyu and Qingyuan, but significantly higher than the non-e-waste recycling areas. BDE 209, BDE 138 and BDE 28 were the three dominant PBDE congeners in the soil. Principal component analysis (PCA) indicated that the commercial penta-BDEs and deca-BDE could be considered as the main sources of PBDEs pollution in this region. Redundancy analysis (RDA) suggested that the local PBDEs sources rather than soil properties influenced the PBDEs distribution in Ziya e-waste recycling area. This study systematically revealed the occurrence and distribution of PBDEs in soils from the biggest established circular economy park in northern China.
多溴联苯醚（PBDEs）是广泛存在的持久性有机污染物（POPs），因为它们广泛用于各种电子产品，对人类健康和生态系统构成了巨大威胁。本研究在中国北方的天津市一个电子废物回收区共采集了 54 个土壤样本，用于分析 14 种 PBDE 同系物的存在和分布。来自子牙电子废物回收区的土壤中 BDE-209、∑PBDEs 和∑PBDEs 的浓度分别为 2.9-2666ng/g dw（干重）（平均值为 90ng/g dw）、3.0-41ng/g dw（平均值为 13ng/g dw）和 5.9-2699ng/g dw（平均值为 103ng/g dw）。∑PBDEs 浓度从中心区域到周围区域呈现出明显的下降趋势。一般来说，由于天津市的风向，北部地区的 PBDEs 水平高于电子废物回收区的南部地区。深层土壤受到 PBDEs 的污染较小，这主要是由于 PBDEs 在表层土壤中的沉积、迁移和渗透。总的来说，研究区域的 PBDEs 水平远低于中国南方一些典型的电子废物回收区，如贵屿和清远，但明显高于非电子废物回收区。土壤中存在的三种主要 PBDE 同系物为 BDE-209、BDE-138 和 BDE-28。主成分分析（PCA）表明，商用五溴和十溴联苯醚可以被认为是该地区 PBDEs 污染的主要来源。冗余分析（RDA）表明，本地 PBDEs 来源而不是土壤性质影响了子牙电子废物回收区 PBDEs 的分布。本研究系统地揭示了中国北方最大的循环经济园区土壤中 PBDEs 的存在和分布。
