湖泊沉积物重金属形态与DOM耦合研究方法综述
Journal: Ecological Environment and Protection DOI: 10.32629/eep.v8i12.2993
Abstract
湖泊沉积物是重金属的重要归宿,其生态风险主要取决于化学形态而非总量。溶解性有机质(DOM)作为沉积物中最活跃的组分,通过络合、氧化还原等界面过程,深刻调控着重金属的形态转化与生物有效性。本文系统综述了该领域的研究方法体系：在重金属分析方面,涵盖了从总量测定、顺序提取到以X射线吸收光谱(XAS)为核心的微观价态表征技术；在DOM表征方面,总结了从光学性质、分子组成到反应性测定的多层次方法；最后,归纳了研究二者耦合作用的综合技术路径,包括荧光猝灭滴定、多技术联用与模型模拟。本文旨在为相关研究提供方法学参考,并展望多尺度原位表征与机理模型整合的未来方向。
Keywords
湖泊沉积物；重金属形态；溶解性有机质；耦合机制
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