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从海河流域的沉积物中发现的短链和中链化抛:来源,分布和生态风险评估

Xiaoying Cao¹, Lirong Gao², Xiaoxu Jiang³

¹State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.

|December 4, 2023

概括

类抛 (CPs) 污染了海河沉积物,造成生态风险. 测量了短链 (SCCPs) 和中链 (MCCPs) 的水平,SCCPs在某些领域带来更高的风险.

科学领域:

环境化学环境化学
生态毒理学生态毒理学
沉积物的分析分析.

背景情况:

甲 (CPs) 是工业化学品,可以积聚在水体沉积物中.
海河流域是中国人口密集和城市化地区,面临CP的潜在风险.
了解该盆地的CP污染及其相关的生态风险至关重要.

研究的目的:

为了确定海河流域沉积物中短链 (SCCPs) 和中链 (MCCPs) 化抛的度.
在沉积物中识别CP的来源和分布.
评估SCCP和MCCP在水生环境中带来的生态风险.

主要方法:

从海河流域内的六条河流收集了沉积物样本.
使用二维气体染色学-电子捕获负电离质谱法 (GC-MS) 分析了CP度.
采用了统计分析,包括分层集群分析和主要组件分析.

主要成果:

沉积物中的SCCP和MCCP度分别在131.831767.71 ng/g dw和89.721442.82 ng/g dw之间.
主导的SCCP类同源是C10Cl6-7和MCCP类同源是C14Cl7-8.
CP污染与工业过程和人类活动有关,SCCP在永定新河具有很高的风险.

结论:

CPs存在于海河流域沉积物中,来源于工业和人类活动.
在某些特定地区,如永定新河,SCCP会造成重大生态风险.
通常,MCCP对生态风险极小,但建议进一步监测.

关键词:

同源组是共源组的组成部分.海河河流盆地海河河流盆地许多MCCP都是可以实现的.在SCCP中,SCCP是最重要的.沉积物沉积物是一种沉积物.

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