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在空气和气泡条件下,从受污染的河岸土壤悬浮中产生元素

Shuting Zhao¹, Akihiko Terada¹, Makoto Nakashima²

¹Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-Cho, Koganei, Tokyo, 184-8588, Japan.

Environmental science and pollution research international

|April 23, 2024

概括

反氧化条件对沿海土壤的元素 (Hg0) 排放有重大影响. 土壤中有机物含量较高可以通过影响这些氧化还原条件来减轻Hg0的产生.

科学领域:

环境科学环境科学
地质化学地质化学
土壤科学土壤科学

背景情况:

沿海土壤的元素 (Hg0) 排放受到动态氧化还原条件的影响.
了解这些氧化还原动力学对于预测生态系统中的循环至关重要.

研究的目的:

研究不同氧化还原条件对污染的河岸土壤Hg0排放的影响.
阐明土壤特性,特别是有机物质在不同氧化还原状态下的Hg0生产中介作用.

主要方法:

用5个被Hg污染的土壤样本进行了土壤悬浮实验.
样品经过两种氧化还原条件:空气 (氧化) 和N2 (减氧) 处理.
测量了Hg0排放量,溶解有机碳 (DOC),Fe2+和Hg2+度.测量了Hg0排放量,溶解有机碳 (DOC),Fe2+和Hg2+度.

主要成果:

五分之四的土壤在空气处理过程中显示出较高的Hg0排放量,而不是N2处理.
有机物含量较高的土壤在氧化还原条件之间Hg0生产没有显著差异.
减少条件 (N2) 导致DOC和Fe2+度增加,与Hg2+正相关,并表明减少Hg2+可供降低至Hg0.

结论:

反氧化条件在调节沿海土壤Hg0排放方面发挥着至关重要的作用.
有机物质含量是一个关键因素,可以改变氧化还原条件和Hg0生产之间的关系,可能通过影响的特异化和可用性.
需要进一步的研究才能充分理解有机物在生物地化学循环中的保护作用.

关键词:

基本的是一种元素.雷多克斯条件的情况.沿海地区的土壤.

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