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在亚洲最长河流的沉积物中发现的高化合物的存在,来源分配和风险评估

Tianyi Li¹, Yulin Chen¹, Yile Wang¹

¹Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China.

Journal of hazardous materials

|February 9, 2024

概括

和多基物质 (PFAS) 污染了长江沉积物,下游的水平更高. 织品处理和食品包装是主要来源,需要持续关注环境.

科学领域:

环境化学环境化学
生态毒理学生态毒理学
河流生态系统河流生态系统

背景情况:

和多醇基物质 (PFAS) 是持久性有机污染物,在环境中广泛存在.
主要河流系统中的沉积物污染对水生生态系统和人类健康至关重要.
长江是亚洲的重要水道,面临着工业和城市活动带来的日益严重的污染压力.

研究的目的:

调查长江沉积物中PFAS的发生,分布和来源.
评估沉积物特性与PFAS度之间的相关性.
评估长江PFOS带来的环境风险.

主要方法:

在长江主流沿线采集沉积物样本.
使用先进的分析技术对15种PFAS进行分析.
使用Unmix模型进行源分配.
对PFAS和环境参数 (TOC,TN,粒度) 之间的相关性进行统计分析.
对PFOS的环境风险评估.

主要成果:

在15种PFAS中检测到13种,总度在0.058到0.89 ng/g dw之间.
perfluorooctane 硫酸 (PFOS) 和 perfluorooctanoic 酸 (PFOA) 是主要的污染物.
与上游和中游相比,在下游沉积物中观察到更高的PFAS度.
织物处理和食品包装被确定为主要来源,约占总来源的50%.
在PFAS度和沉积物特性 (TOC,TN,粒径) 之间发现了显著的相关性.
城市化速度和人均国内生产总值对PFAS分配产生了积极影响.
由于PFOS对环境造成的风险低至中等.

结论:

在长江沉积物中明显存在PFAS污染,工业和消费产品来源的贡献很大.
沉积物特性和人为因素在PFAS的分布和积累中起着至关重要的作用.
由于PFOS对环境构成中等风险,因此需要继续对长江的PFAS污染进行监测和管理战略.

关键词:

perfluorinated 化合物 (PFC) 是一种含有多的化合物.沉积物沉积物是一种沉积物.来源分配的分配方式空间分布的空间分布长江长江是长江的一条河流.

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