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将沉积物PAH发生形式与精确的湖泊污染管理联系起来:通过三组分分析获得多维洞察力

Xiaoshui Li¹, Chijun Zhou¹, Erxuan Han¹

¹State Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences, Wuhan, 430074, China.

Environmental research

|October 12, 2025

概括

这项研究揭示了不可提取的多环芳 (NE-PAHs) 显著影响湖泊沉积物污染水平和来源. 包括生物可访问性 (B-PAHs) 和NE-PAHs,完善有机污染物的污染评估和管理策略.

科学领域:

环境化学环境化学
生态毒理学生态毒理学
沉积物质量评估沉积物质量评估

背景情况:

目前的湖泊管理往往忽视了沉积物中有机污染物的完全存在形式.
可提取分数 (E-PAHs) 可能低估了总多环芳 (T-PAHs) 和它们对环境的影响.
了解可生物利用 (B-PAHs) 和不可提取 (NE-PAHs) 分数对于准确的生态风险评估至关重要.

研究的目的:

系统地检查卢胡湖沉积物中的B-PAHs,E-PAHs和NE-PAHs.
评估纳入NE-PAHs和B-PAHs对污染水平评估,来源分配和生态风险的影响.
倡导多部分PAH分析,以优化湖泊沉积物管理.

主要方法:

对三种多环芳 (PAH) 分数的分析:可生物利用 (B-PAHs),可提取 (E-PAHs) 和不可提取 (NE-PAHs).
基于E-PAHs与T-PAHs (E-PAHs + NE-PAHs) 的污染水平和来源贡献的比较.
评估PAH生物可访问性与沉积物特征和位置 (中心与海岸线) 相比.

主要成果:

总PAH (T-PAH) 明显超过E-PAH,将污染从"中度/轻度"重新分类为"中度".
纳入NE-PAHs改变了来源贡献,特别是减少了交通排放和增加了燃煤贡献.
生物可访问性不同,由于有机物和老化,中心沉积物中的百分比较低;特定地点显示高B-PAHs,表明新鲜的投入.

结论:

整合NE-PAHs和B-PAHs可以更准确地了解湖泊沉积物污染水平和来源.
由于生态毒性更高的可提取分数,交通排放衍生的PAH需要优先控制.
多分数PAH分析对于完善生态风险评估和优化湖泊沉积物管理策略至关重要.

关键词:

生物可访问性生物可访问性无法提取的残留物无法提取的残留物发生形式的发生形式.污染管理污染管理多环芳 (PAHs) 是一种多环芳.沉积物沉积物是一种沉积物.

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