选择典型废弃日用品塑料,对特征处置场景下其PBDEs的浸出特征及健康风险进行了评价.结果表明,日用品塑料在硫酸/硝酸、醋酸和腐殖酸溶液中达到溶出平衡时,∑21 PBDEs释放量分别为20.00、63.65、125.60μg·kg-1,均以BDE209为主.进入生活垃圾填埋场的释放量高于堆存和简易填埋过程,在最不利条件下距填埋场下游500 m处地下水中PBDEs最大浓度为39.67μg·L-1,居民饮用地下水产生的非致癌风险指数为2.11×10-1,其中十溴代物(BDE209)的非致癌风险指数为1.85×10-1,均小于美国标准中非致癌的可接受风险水平(1.0),表明废旧日用品塑料可进入生活垃圾填埋场处置.
Leaching characteristics of PBDEs from some consumer plastic product waste and health risk were investigated in a typical disposal scenario. The results showed that after reaching the equilibrium, the concentrations of the ∑21 PBDEs leached from the crushed plastic waste were 20.00 μg·kg-1 ,63.65 μg·kg-1 ,125.60 μg·kg-1 in solutions of sulfuric acid/ nitric acid, acetic acid and humic acid respectively, and BDE209 was the dominant congener. The dissolution rate of the∑21PBDEs in waste landfill site was higher than those in stockpiling and non?standard landfill site. The highest concentration of the ∑21 PBDEs in groundwater 500 meters downstream the landfill was 39.67 μg·L-1. The non?cancer risk from PBDEs was 2.11×10-1 when the waste was put into the landfill, while the non?cancer risk from BDE209 was 1. 85 × 10-1 . The non?cancer risk ( hazard index, HI) were below the value accepted from the US EPA(1.0). This consumer plastic product waste could be put into the waste landfill site.
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