Ministry of Agriculture Key Laboratory of Non-point Source Pollution Control, Institute of Environmental Science and Technology, Zhejiang University, Kaixuan Road 268, Hangzhou 310029, PR China.
J Hazard Mater. 2010 Jan 15;173(1-3):653-60. doi: 10.1016/j.jhazmat.2009.08.134. Epub 2009 Sep 1.
The present study was conducted to investigate the levels and sources of heavy metals (Cu, Cr, Cd, Pb, Zn, Hg and As) and persistent organic compounds including polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in soils taken from Wenling, an emerging e-waste recycling city in Taizhou, China. The results suggested that most heavy metals exceeded the respective Grade II value of soil quality standards from State Environmental Protection Administration of China and also exceeded the Dutch optimum values. Total PAHs in soil ranged from 371.8 to 1231.2 microg/kg, and relatively higher PAHs concentrations were found in soils taken from simple household workshops. PCBs were detectable in all samples with total concentrations ranging from 52.0 to 5789.5 microg/kg, which were 2.1-232.5 times higher than that from the reference site (24.9 microg/kg). Results of this study suggested soil in the Wenling e-waste recycling area were heavily contaminated by heavy metals, PAHs and PCBs. Furthermore, compared with large-scale plants, simple household workshops contributed more heavy metals, PAHs and PCBs pollution to the soil environment, indicating that soil contamination from e-waste recycling in simple household workshops should be given more attention.
本研究旨在调查中国台州新兴电子废物回收城市温岭土壤中重金属（铜、铬、镉、铅、锌、汞和砷）和持久性有机化合物（包括多环芳烃（PAHs）和多氯联苯（PCBs））的水平和来源。结果表明，大多数重金属超过了中国国家环境保护总局土壤质量标准的二级值，也超过了荷兰的最佳值。土壤中的总多环芳烃含量范围为 371.8 至 1231.2 微克/千克，在简单家庭作坊采集的土壤中发现了相对较高的多环芳烃浓度。所有样品中均检测到 PCBs，总浓度范围为 52.0 至 5789.5 微克/千克，是参考点（24.9 微克/千克）的 2.1-232.5 倍。本研究结果表明，温岭电子废物回收区的土壤受到重金属、多环芳烃和 PCBs 的严重污染。此外，与大规模工厂相比，简单家庭作坊对土壤环境造成了更多的重金属、多环芳烃和 PCBs 污染，这表明应更加关注简单家庭作坊电子废物回收造成的土壤污染。
