华南典型电子垃圾拆解区土壤中十溴联苯醚的分布特征及迁移特性

十溴联苯醚(BDE-209)是电子垃圾拆解处置地区最主要的持久性有机污染物之一。采集了华南某电子垃圾拆解处置场地及其周边村镇18个采样点的表层土壤样品和其中11个采样点垂直尺度的土壤样品,利用高效液相色谱(HPLC)分析测定了BDE-209的含量。结果表明,该区域及周边农田土壤中BDE-209的浓度范围为未检出至5.47 mg·kg~(-1),在该区域的检出率达到了90%以上,BDE-209已经从电子垃圾拆解处置场所迁移到附近及周边的农田土壤中。土壤中BDE-209的垂直分布数据显示,在0~10 cm层面相对含量最高,而在50 cm以下层面均未检出,BDE-209在土壤中的浓度随深度的增加而减少,输入强度影响BDE-209在垂直方向的迁移能力。

The distribution and transport characteristics of BDE-209 in soils from a typical electronic waste dismantling site in South China

Deca-polybrominated diphenyl ether (BDE-209) is one of the leading persistent organic pollutants (POPs) in electronic waste dismantling sites. In this study, 18 topsoil samples and 11 vertical soil samples were collected from a typical electronic waste dismantling site and surrounding areas in South China. The high performance liquid chromatography (HPLC) was used to detect the concentration of BDE-209 in sampling soils. Results show that the maximum concentration of BDE-209 reaches 5.47 mg?kg-1 and the detection frequency is more than 90%. It suggests that BDE-209 has transported from the electronic waste dismantling site to the nearby and surrounding agricultural soils. In the vertical distribution pattern, the highest concentration of BDE-209 was found in the layer of 0~10 cm and it can not be detected over 50 cm depth. With the increasing of vertical depth, the concentration of BDE-209 in the soils decreases. The input intensity would affect the transport ability of BDE-209 in vertical direction.