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在土壤中固定,和,使用酸存在的酸酸化合物

Md Shoffikul Islam¹, Md Abul Kashem¹, Mohammad Moniruzzaman²

¹Department of Soil Science, University of Chittagong, Chattogram, Bangladesh.

Environmental technology

|December 30, 2023

概括

酸和酸的组合有效地使土壤中的,和等重金属不运动. P-CA2处理显示出最显著的金属固定,这表明了土壤修复的综合方法.

科学领域:

环境化学环境化学
土壤科学土壤科学
地质化学地质化学

背景情况:

根球土壤中的低分子量有机酸 (LMWOAs) 可以干扰酸盐-金属相互作用.
了解酸盐化合物和LMWOA如何影响金属固定对于土壤修复至关重要.
(Cd), (Pb) 和 (Zn) 是常见的土壤污染物,需要有效的固定化战略.

研究的目的:

研究酸 (P) 和酸 (CA) 对土壤中Cd,Pb和Zn的固定的影响.
为了确定P和CA的最佳组合用于重金属固定.
阐明在不同处理条件下金属固定或调动的基本机制.

主要方法:

使用NaH2PO4 (P) 和不同度的酸 (CA) 的化实验.
欧洲共同体参考局 (BCR) 序列提取和CaCl2提取以评估金属的移动性.
泽塔潜力,里埃变换红外光谱 (FTIR) 和X射线衍射 (XRD) 来分析固定化机制.

主要成果:

P,低CA (CA2) 和P-CA2处理显著降低了酸溶性和CaCl2-可提取的Cd,Pb和 Zn.
P-CA2治疗在固定金属方面表现出最高的有效性.
高CA度或高CA的P导致金属动员,而P单独诱导了Cd酸盐,pyromorphite和hopeite的形成.

结论:

在污染的土壤中,P-CA2处理对固定和重新分配重金属非常有效.
静电吸附是金属固定的一个关键机制,特别是在P-CA2处理中.
酸可以影响Cd,Pb和Zn的矿物稳定性,因此需要在以酸盐为基础的土壤修复中考虑它.

关键词:

酸是一种酸.固定化固定化固定化金属,金属的使用.酸盐化合物是一种酸盐化合物.土壤土壤土壤土壤土壤

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