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天然有机质的表征及环境效应
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摘要
天然有机质在地表环境介质的碳循环过程中扮演重要角色,对环境介质中污染物的生物可利用性、迁移转化性及多种环境行为产生重要影响。而地表水环境中有机质的来源、形态及粒径多样,较土壤、沉积物等环境系统而言具有更新速度快、光通透性好、赋氧能力强及生物量丰富等独特性,因此在水环境中有机质的地球化学行为更为复杂多样。通过掌握多种水生生态系统中有机质特征和环境行为,对全球有机质的循环转化模型的构建和认识具有较大贡献。本文主要以地表淡水环境为对象,综述了天然有机质的来源、组成及性质,叙述了天然有机质对污染物的性质产生的环境效应及循环转化特征,并简单总结了常用的检测方法和分析技术。最后对目前地表水环境中有机质的生物地球化学研究中有待进一步探索的地方进行了总结与展望。
引文
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