Li Huizhen, Bai Jinmei, Li Yetian, Cheng Hefa, Zeng Eddy Y, You Jing
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
J Environ Monit. 2011 Apr;13(4):836-43. doi: 10.1039/c0em00633e. Epub 2011 Feb 22.
The transport behaviors of a suite of contaminants released from electronic waste (e-waste) recycling operations, including polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), and heavy metals, were evaluated by analyzing the contaminant residues in surface soils sampled in the surrounding area of an e-waste recycling site in South China. Concentrations of PBDEs and PCBs in the soil samples ranged from 0.565 to 2908 ng g(-1) dw and from 0.267 to 1891 ng g(-1) dw, respectively, while soil residues were 0.082-2.56, 3.22-287, and 16.3-162 μg g(-1) dw for Cd, Cu, and Pb, respectively. Concentrations of PBDEs and PCBs in soil decreased with increasing distance from the source of pollution, indicating possible PBDE and PCB contamination in the surrounding areas due to the short-range transport of these compounds from the e-waste recycling site. Although no significant difference in the short-range transport potential among PBDE and PCB congeners was observed, reductions in concentrations of the highly-brominated-BDEs and highly-chlorinated-CBs were slightly quicker than those of their less-halogen-substituted counterparts. Conversely, heavy metals showed the lowest transport potential due to their low vapor pressure, and results showed metals would remain near the pollution source instead of diffusing into the surrounding areas. Finally, mass inventories in areas near the e-waste site were 0.920, 0.134, 0.860, 4.68, 757, and 673 tons for BDE209, PBDEs (excluding BDE209), PCBs, Cd, Cu, and Pb, respectively.
通过分析在中国南方一个电子垃圾回收场周边地区采集的表层土壤中的污染物残留，评估了电子垃圾（电子废弃物）回收作业释放的一系列污染物的迁移行为，这些污染物包括多溴二苯醚（PBDEs）、多氯联苯（PCBs）和重金属。土壤样品中PBDEs和PCBs的浓度范围分别为0.565至2908 ng g(-1)干重和0.267至1891 ng g(-1)干重，而土壤中Cd、Cu和Pb的残留量分别为0.082 - 2.56、3.22 - 287和16.3 - 162 μg g(-1)干重。土壤中PBDEs和PCBs的浓度随着与污染源距离的增加而降低，这表明由于这些化合物从电子垃圾回收场的短距离迁移，周边地区可能存在PBDE和PCB污染。虽然未观察到PBDE和PCB同系物在短距离迁移潜力上有显著差异，但高溴化BDEs和高氯化CBs浓度的降低略快于其卤素取代较少的对应物。相反，重金属由于其低蒸气压而显示出最低的迁移潜力，结果表明金属将留在污染源附近而不是扩散到周边地区。最后，电子垃圾场附近地区的质量存量分别为：BDE209为0.920吨、PBDEs（不包括BDE209）为0.134吨、PCBs为0.860吨、Cd为4.68吨、Cu为757吨、Pb为673吨。
