聚乙乙烯及其替代品在典型的阻燃剂生产园区的土壤核中:垂直分布和潜在的影响因素
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Chifei Bai1, Xiang Ge1, Zhaofa Huang1
1Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, PR China; Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green Development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
阻燃剂的替代品,如甲二乙 (DBDPE) 和有机阻燃剂 (OPFRs),严重污染了土壤. 土壤有机物和粘土含量影响这些持久污染物的垂直分布.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 污染研究 污染研究
背景情况:
- 聚二乙烯 (PBDE) 受到限制,导致越来越多地使用除甲二乙烯 (DBDPE) 和有机酸盐阻燃剂 (OPFR) 等替代品.
- 了解这些新兴阻燃剂的土壤污染和垂直运输对于环境风险评估至关重要.
研究的目的:
- 调查PBDE,DBDPE和OPFR在阻燃剂生产区域内和周围土壤中的垂直分布.
- 确定影响这些阻燃剂在土壤中向下迁移的因素.
主要方法:
- 从深度高达5.00米的地表土壤和土壤核心样本的收集.
- 对聚二乙烯 (PBDE),脱二乙烯 (DBDPE) 和有机酸盐阻燃剂 (OPFR) 度的分析.
- 相关性分析以确定土壤特性 (有机物,粘土含量) 对污染物分布的影响.
主要成果:
- PBDE和DBDPE在生产场附近呈现点源分布,度异常高.
- 主要在住宅区发现了OPFR,这表明了不同的排放来源.
- 观察到显著的垂直迁移,污染物检测到深度为5.00米和更深.
- 即使在最大采样深度,Deca-BDE和DBDPE的中位数度仍然很高.
结论:
- 该研究证实了土壤的严重污染和PBDE,DBDPE和OPFR的深垂直传输.
- 土壤有机物含量是控制垂直分布的关键因素,而粘土颗粒影响高化合物.
- 这些发现强调了这些阻燃剂替代品的环境持久性和流动性,需要进一步的监测和风险管理策略.
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