【摘要】 利用大鼠肝癌细胞H4IIE离体生物测试(EROD测试)评估了位于我国南方的典型电子垃圾处理地(某镇)三个自然村共23个土壤样品有机提取物的芳烃受体效应,并研究了这些地区土壤中芳烃受体效应物质的污染水平和空间分布规律.结果表明,在所研究地区中,塑料回收村芳烃受体效应最高,其次是电路板回收村和电器拆解村.与文献数据相比,该镇土壤有机组分的芳烃受体效应较传统工业城市天津的污染土壤高,且空间分布规律与该镇电子垃圾处理业的区域分工在某种程度上有密切关系.研究结果表明,粗放型的电子垃圾处理手段导致了芳烃受体效应物质在该镇土壤环境中的积累,且离体生物效应标记方法可用来快速筛选和甄别芳烃受体效应物质污染的高风险区.更多还原

【Abstract】 A total of 23 surface soil organic extracts from three villages in an electronic waste(e-waste)recycling center(one town)in southern China were assayed using the ethoxyresorfin O-deethylase(EROD)bioassay to assess the levels and spatial distribution of Ah-receptor agonists.The highest levels of Ah-agonists were observed in the village for plastic recovery,followed by the villages for circuit board recovery and equipment dismantling.In comparison with previous data in literature,concentrations of Ah-receptor agonists in soils in the typical e-waste recycling center were higher than contaminated soils in Tianjin,where traditional industry is dominant.The great variance in spatial distribution of dioxin-like chemicals might be related to the industrial division of the local e-waste recycling business.Primitive e-waste recycling activities result in the accumulation of Ah-receptor agonists in soils,and the EROD bioassay could be a useful alternative method for screening and evaluation of risks on a regional scale.更多还原