双价金属的不同再分配行为与Fe(II) 介导的雅罗酸相转换相关
Xiaohu Jin1, Chuling Guo1, Xueqin Tao2
1School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China.
Environmental pollution (Barking, Essex : 1987)
|April 19, 2024
概括
二元重金属影响铁 (II) 诱导的矿转化,一般减缓溶解. 一些金属,如和,有助于凝的形成,并融入固体产品.
科学领域:
- 环境地质化学环境地质化学
- 矿物转化 矿物转化的过程
- 生物地质化学生物地质化学
背景情况:
- 铁 (II) /铁 (III) 循环驱动着石的溶解和转化.
- 双重重金属经常与石共存,但它们对Fe (II) 诱导的变化的影响尚未完全理解.
研究的目的:
- 为了研究Fe (II) 诱导的石转化在Cd (II),Mn (II),Co (II),Ni (II) 和Pb (II) 的存在下.
- 确定这些金属对矿物转化路径和金属再分区的影响.
主要方法:
- 在中性pH下进行无氧实验,使用1mMFe (II) 和1mM的单个双价金属.
- 矿产产品和金属吸附/融入固体相的分析.
主要成果:
- 所有测试的金属 (Cd,Mn,Co,Ni,Pb) 阻了Fe (II) 诱导的矿溶解.
- 在大多数系统中,Lepidocrocite是占主导地位的中间体,除了Co (II) 和Ni (II) 系统外,那里的goethite形成更受欢迎.
- 观察到Co (II),Ni (II) 和Pb (II) 在固体产品中的显著吸附和结合.
结论:
- 二元重金属显著改变Fe (II) 诱导的矿转化途径.
- 将金属纳入二级矿物质中,如石,是金属封存的关键过程.
- 了解这些相互作用对于预测硫化环境中的污染物命运至关重要.
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