Tang Zhenwu, Huang Qifei, Yang Yufei, Nie Zhiqiang, Cheng Jiali, Yang Jun, Wang Yuwen, Chai Miao
MOE Key Laboratory of Regional Energy and Environmental Systems Optimization, Environmental Research Academy, North China Electric Power University, Beijing, 102206, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Environ Sci Pollut Res Int. 2016 Jan;23(1):625-37. doi: 10.1007/s11356-015-5296-7. Epub 2015 Sep 2.
Road dusts were collected from an area where intense mechanical recycling of plastic wastes occurs in Wen'an, north China. These dusts were investigated for polybrominated diphenyl ethers (PBDEs) and heavy metals contamination to assess the health risk related to these components. Decabromodiphenyl ether (BDE-209) and Σ21PBDE concentrations in these dusts ranged from 2.67 to 10,424 ng g(-1) and from 3.23 to 10,640 ng g(-1), respectively. These PBDE concentrations were comparable to those observed in road dust from e-waste recycling areas but were 1-2 orders of magnitude higher than concentrations in outdoor or road dusts from other areas. This indicates that road dusts in the study area have high levels of PBDE pollution. BDE-209 was the predominant congener, accounting for 86.3% of the total PBDE content in dusts. Thus, commercial deca-BDE products were the dominant source. The average concentrations of As, Cd, Cr, Cu, Hg, Pb, Sb, and Zn in these same dust samples were 10.1, 0.495, 112, 54.7, 0.150, 71.8, 10.6, and 186 mg kg(-1), respectively. The geoaccumulation index suggests that road dusts in this area are moderately to heavily polluted with Cd, Hg, and Sb. This study shows that plastic waste processing is a major source of toxic pollutants in road dusts in this area. Although the health risk from exposure to dust PBDEs was low, levels of some heavy metals in this dust exceeded acceptable risk levels for children and are of great concern.
在中国北方文安一个存在大量塑料垃圾机械回收作业的区域采集了道路灰尘。对这些灰尘中的多溴二苯醚（PBDEs）和重金属污染情况进行了调查，以评估与这些成分相关的健康风险。这些灰尘中十溴二苯醚（BDE - 209）和Σ21PBDE的浓度分别在2.67至10424 ng g(-1)以及3.23至10640 ng g(-1)之间。这些多溴二苯醚浓度与在电子垃圾回收区域道路灰尘中观察到的浓度相当，但比其他区域的室外或道路灰尘浓度高1 - 2个数量级。这表明研究区域的道路灰尘存在高水平的多溴二苯醚污染。BDE - 209是主要的同系物，占灰尘中多溴二苯醚总含量的86.3%。因此，商用十溴二苯醚产品是主要来源。这些相同灰尘样品中砷（As）、镉（Cd）、铬（Cr）、铜（Cu）、汞（Hg）、铅（Pb）、锑（Sb）和锌（Zn）的平均浓度分别为10.1、0.495、112、54.7、0.150、71.8、10.6和186 mg kg(-1)。地累积指数表明该区域道路灰尘受到镉、汞和锑的中度至重度污染。本研究表明塑料垃圾处理是该区域道路灰尘中有毒污染物的主要来源。尽管接触灰尘中多溴二苯醚带来的健康风险较低，但该灰尘中一些重金属含量超过了儿童可接受的风险水平，令人高度关注。
