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聚二污染作为一个无意的主要污染物在珍珠河三角洲,中国

Hongbing Wang¹, Chenglong Wei¹, Guowei Fu¹

¹Haikou Marine Geological Survey Center, China Geological Survey, Haikou, 571127, China.

Environmental research

|July 17, 2025

概括

这项研究全面分析了珍珠河三角洲所有209种多二 (PCB),揭示了陆地排水作为主要来源. 由于电子废物进口减少,PCB水平在2017年达到峰值,因电子废物进口减少而导致同源成分的变化.

科学领域:

环境化学环境化学
污染研究污染研究
有机污染物有机污染物

背景情况:

珍珠河三角洲 (PRD) 是一个高度工业化的地区,有大量的多二 (PCB) 污染.
在PRD之前的研究集中在传统的PCB同源体上,缺乏对所有209种同源体的全面分析.

研究的目的:

进行详细的分布分析,组合和所有209个PCB同源的来源在PRD.
调查该地区PCB污染的时间趋势和影响因素.

主要方法:

对209种PCB同胞的分布和组成进行分析.
考虑陆地输入,污水处理和工业排放的PCB的来源分配.
从1980年到2021年,对PCB度的时间趋势分析.

主要成果:

总PCB度在34至5218ng/kg (平均1372±1417ng/kg) 之间,主要由2和5类产物主导.
确定了主要的PCB来源:雨水排放 (67.3%),污水处理 (10.25%),有机色素生产 (8.54%) 和无意排放 (4.01%).
PCB度增加到2017年,然后下降;组成从4-转向2-同源,与减少电子废物进口有关. 无意排放现在占PCB的57.68%.

结论:

陆地输入,特别是降雨下水,是PRD的主要PCB来源.
PCB 同源成分的变化和无意排放的增加凸显了不断变化的污染动态.
虽然PCB含量一直在波动,但目前PRD的潜在生态风险被认为相对较低.

关键词:

环境影响因素是环境影响因素.非技术性的PCB.源头分析源头分析空间特征空间特征空间特征不故意的排放是无意的

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