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结晶酸是环境稳定的吗? 一项关于CRPO₄·6H₂O的形成,溶解和氧化风险的研究

Yunyi Li¹, Wenshuai Zhou¹, Xinmiao Huang¹

¹Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.

Journal of hazardous materials

|December 3, 2023

概括

酸 (CrPO4·6H2O) 是Cr(VI) 修复的副产品,它比Cr(OH) 3·3H2O具有更高的溶解和氧化风险,特别是在酸性和性条件下. 它的环境稳定性需要仔细考虑.

科学领域:

环境化学环境化学
地质化学地质化学
整治技术整治技术

背景情况:

六价 (Cr(VI)) 的污染对环境构成重大风险.
的修复通常涉及减少,可能形成酸 (CrPO4·6H2O) 副产品.
目前尚不清楚CrPO4·6H2O的环境稳定性和风险.

研究的目的:

综合评估CrPO4·6H2O的形成条件,结构,特性和风险.
为了评估CrPO4·6H2O的溶解和氧化行为.
为了比较CrPO4·6H2O与Cr(OH) 3·3H2O的稳定性和风险.

主要方法:

在不同pH值和温度下对CrPO4·6H2O形成的实验性评估.
在不同的pH条件下分析溶解动力学和溶解度.
研究氧化易感性,包括与 δ-MnO2.2 的相互作用.

主要成果:

在pH 5-7和室温下形成晶体CrPO4·6H2O.
由于其Cr-P键,CrPO4·6H2O具有比Cr(OH) 3·3H2O更大的溶解风险.
溶解和氧化风险取决于pH值,受CrH2PO42+和Cr(OH) 4-.等物种的影响.
与Cr(OH) 3·3H2O相比,在酸性和中性至性条件下,CrPO4·6H2O的氧化风险增加.

结论:

由于其更高的溶解和氧化潜力,CrPO4·6H2O对环境构成重大风险.
环境条件,特别是pH值,对CrPO4·6H2O的稳定性和命运具有关键的影响.
需要进一步的研究来管理CrPO4·6H2O在Cr(VI) 整治过程中的风险.

关键词:

酸是一种酸.地下水的地下水.风险风险风险风险风险土壤土壤土壤.稳定的稳定性稳定的稳定性

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