典型废旧塑料处置地土壤中多溴联苯醚污染特征

选择我国北方典型废旧塑料处置地为研究区域,对土壤中21种PBDEs(多溴联苯醚)的含量、同系物组成和分布特征进行了研究. 结果表明,该区域土壤中w(∑PBDEs)为1.25~3673.41ng/g,平均值为749.29ng/g,其中w(BDE209)占w(∑PBDEs)的92%以上. 整体上,处置作坊内土壤中w(∑PBDEs)明显高于作坊间道路土壤和处置地周边土壤. 塑料中添加的十溴联苯醚工业品是该区域土壤中PBDEs的主要来源. 该区域土壤PBDEs污染水平与我国电子废物集中处置场地相当,高出我国一般城市及工业城市土壤1~3个数量级,是我国另一类PBDEs高污染区,其环境风险性应引起足够的重视. 

Pollution Characteristics of Polybrominated Diphenyl Ethers in Soils from Waste Plastic Recycling Region in China

Levels, composition and distribution characteristics of 21polybrominated diphenyl ethers (PBDEs) were investigated in surface soils from a typical waste plastic recycling region in North China. The result showed that the concentrations of total PBDEs ranged from 1.25to 3673.41ng/g with a mean value of 749.29ng/g. BDE209was the most dominant congener (>92%) of PBDEs in soils. The PBDE levels in the workshop soils were higher than those in the road soils and surrounding soils. The industrial decabromodiphenyl added in plastic was the main source of PBDEs in the soils of the region. Compared with previous studies, the results showed that the PBDE levels in soils in this study were similar to those in some e-waste recycling regions of China. Moreover, the concentrations of PBDEs in this study were 1to 3orders of magnitude higher than those reported in other urban soils in China, which should be paid more attention regarding to the potential higher environmental risks of PBDE in these soils.