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生物炭作为减轻污染湖沉积物中的和甲基流动性的可持续补充剂:从化实验中的见解

Elena Pavoni¹, Federico Floreani¹, Elisa Petranich¹

¹Department of Mathematics, Informatics and Geosciences, University of Trieste, Via E. Weiss 2, 34128 Trieste, Italy.

The Science of the total environment

|June 20, 2025

概括

生物炭修正案有效地减少了污染沉积物中的 (Hg) 和甲基 (MeHg) 的释放. 这种可持续的方法通过限制有毒甲基化和流动性,减轻了对海洋生态系统和人类健康的风险.

科学领域:

环境化学环境化学
海洋生态毒理学海洋生态毒理学
生物地质化学生物地质化学

背景情况:

沉积物中的 (Hg) 构成风险,特别是在无氧状态下,这增加了有毒甲基 (MeHg) 的释放.
吸附剂修正案提供了一种可持续的策略,以减少Hg甲基化和污染水环境中的流动性.

研究的目的:

评估生物炭作为沉积物修改剂对减轻Hg和MeHg排放的有效性.
在氧-无氧过渡过程中,评估生物炭对沉积物-水界面 (SWI) 的物理化学参数的影响.

主要方法:

使用带有生物炭修改和未经处理的Hg污染沉积物的盆地腔室进行化实验.
监测溶解氧 (DO),氧化降解潜力 (ORP),Hg,MeHg,Fe,Mn,H2S,以及营养的含量.
在氧-无氧过渡和随后的再氧化阶段进行分析.

主要成果:

生物炭修改显著降低了溶解Hg (DHg) 和DMeHg度,分别降低了75%和90%.
未经处理的系统在无氧状态下显示出更高的DHg和DMeHg水平 (64.3 ng L-1和53.1 ng L-1).
生物炭促进了快速的再氧化,而无氧在未经处理的系统中持续了6天.

结论:

生物炭有效地减轻了SWI的Hg和MeHg流量,减少了甲基化潜力.
生物炭的应用限制了无氧发展,并增强了沉积物的再氧化.
生物炭代表了一种有希望的可持续解决方案,用于管理水生生态系统中的污染.

关键词:

岩室 (英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic chamber,英语:Benthic 生物炭是一种生物炭.水星水星水星水星水星甲基是一种.沉积物-水界面的接口

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