Abstract：
This study systematically investigated the pollution levels and migration trends of PBDEs in soils and plants around engineering plastics factory, and identified the ecological risks of PBDEs in the environment around typical pollution sources.The results showed that 13 kinds of PBDEs were widely detected in the surrounding areas, and the concentration level was higher than the general environmental pollution level. The total PBDE concentrations (∑13PBDEs) in soils ranged from 14.6 to 278.4 ng/g dry weight (dw), and in plants ranged from 11.5 to 176 ng/g dw. Both soil and plant samples showed that BDE-209 was the most important congener, the pollution level in soil and plant was similar, and the composition of PBDEs congener was similar. In the soil column (50 cm), the radial migration of PBDEs was mainly concentrated in the 0-30 cm section. Except for BDE-66, which was mainly located in the 20-30 cm soil layer, the concentration of PBDEs was the highest in the 0-10 cm region. Furthermore, the environmental risks of PBDEs in soil and plants were evaluated by hazard quotient method, and the HQ values were all < 1, which did not exhibit any ecological risk. The evaluation results also showed that the ecological risk of PBDEs in soil was higher than that of plants, especially penta-BDE, which should be paid more attention.
摘要：
本研究系统地调查了工程塑料厂周围土壤和植物中多溴二苯醚的污染水平和迁移趋势。并对典型污染源周围环境中多溴二苯醚的生态风险进行了识别。结果表明,在周边地区广泛检测到13种PBDEs,浓度水平高于一般环境污染水平。土壤中多溴二苯醚的总浓度(∑13多溴二苯醚)为14.6至278.4ng/g干重(dw)，在植物中范围从11.5到176ng/gdw。土壤和植物样本均表明BDE-209是最重要的同源物，土壤和植物的污染水平相似，PBDEs同源物的组成相似。在土柱（50厘米），PBDEs的径向迁移主要集中在0-30cm段。除主要位于20-30厘米土层的BDE-66外，PBDEs的浓度在0-10cm区域最高。此外，用危害商法评价了多溴二苯醚在土壤和植物中的环境风险，HQ值均<1，未表现出任何生态风险。评价结果还表明,PBDEs在土壤中的生态风险高于植物,尤其是五溴二苯醚，这应该引起更多的注意。
