Wang Shaorui, Wang Yan, Luo Chunling, Li Jun, Yin Hua, Zhang Gan
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Graduate University of Chinese Academy of Sciences, Beijing 100039, China.
Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Environ Pollut. 2016 Jul;214:705-712. doi: 10.1016/j.envpol.2016.04.071. Epub 2016 May 2.
The concentrations and homolog patterns of halogenated flame retardants (HFRs) in vegetables grown at an e-waste contaminated site were investigated. Polybrominated diphenyl ethers (PBDEs) were the dominant HFRs in vegetable tissues, with concentrations ranging from 10.3 to 164 ng g(-1) and 1.16-107 ng g(-1) in shoots and roots, respectively, followed by novel brominated flame retardants (NBFRs) and dechlorane plus (DPs). This is an indication that PBDE contamination in vegetables grown around e-waste recycling sites may pose a risk to the local terrestrial ecosystem and residents. In addition, this is the first report on the concentrations and compositions of NBFRs in vegetables around e-waste recycling sites. The HFRs concentrations in vegetables varied greatly with the vegetable species, with the highest concentrations observed in Brassica oleracea var. capitata. Root concentration factors (RCF) decreased with increasing log Kow of HFRs, which indicated that the uptake of HFRs was controlled mainly by log Kow. Dissimilar HFRs profiles in shoots and roots suggested that the uptake and translocation of HFRs by plants were selective, with lower halogenated congeners prone to accumulation in vegetable tissues. Positive relationships between PBDEs and their substitutes were observed in vegetable tissues, suggesting that the replacement of PBDEs by NBFRs has not resulted in an obvious transition in plants within the study area.
对在一个电子垃圾污染场地种植的蔬菜中卤代阻燃剂（HFRs）的浓度和同系物模式进行了调查。多溴二苯醚（PBDEs）是蔬菜组织中主要的HFRs，地上部分和根部的浓度分别为10.3至164 ng g⁻¹和1.16 - 107 ng g⁻¹，其次是新型溴代阻燃剂（NBFRs）和十氯联苯（DPs）。这表明在电子垃圾回收场地周边种植的蔬菜中的PBDE污染可能会对当地陆地生态系统和居民构成风险。此外，这是关于电子垃圾回收场地周边蔬菜中NBFRs浓度和组成的首份报告。蔬菜中HFRs的浓度因蔬菜种类而异，在结球甘蓝中观察到的浓度最高。根部富集系数（RCF）随着HFRs的log Kow增加而降低，这表明HFRs的吸收主要受log Kow控制。地上部分和根部不同的HFRs分布表明植物对HFRs的吸收和转运具有选择性，低卤代同系物易于在蔬菜组织中积累。在蔬菜组织中观察到PBDEs与其替代品之间存在正相关关系，这表明在研究区域内，NBFRs替代PBDEs并未导致植物体内出现明显转变。
