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基于化学提取方法和体外方法评估硫酸铁对污染土壤的稳定作用:方法上的差异和联系

Ziqi Geng¹, Pengfei Wang², Naiyi Yin²

¹Sino-Danish College, University of Chinese Academy of Sciences, Beijing 101408, PR China; Sino-Danish Center(SDC) for Education and Research, Beijing 101408, PR China.

The Science of the total environment

|March 16, 2024

概括

硫酸铁酸盐有效地稳定了污染的土壤. 基于生理学的提取试验 (PBET) 小肠阶段提供了保守的评估,与可能低估风险的SBRC方法不同.

科学领域:

环境科学环境科学
土壤科学土壤科学
毒理学毒理学毒理学

背景情况:

土壤中污染对环境和人类健康构成重大风险.
硫酸铁是稳定污染土壤的常见剂.
需要综合化学和体外方法的综合评估来评估稳定功效.

研究的目的:

用各种化学和体外方法评估硫酸铁对污染土壤的稳定作用.
为了比较不同提取技术的结果,并确定最保守的评估方法.
探索化学提取和的体外生物可访问性数据之间的关系.

主要方法:

稳定10种含的土壤使用硫酸铁在不同的FeAs摩尔比率 (0,5,10,20) 的稳定.
使用六种化学提取方法进行评估:TCLP,HCl,DTPA,CaCl2,CH3COONH4和 (NH4) 2SO4.
使用四种体外方法进行评估:PBET,IVG,SBRC和UBM.

主要成果:

在非性土壤中,HCl方法是最保守的; (NH4) 2SO4 在性性土壤中.
实验室内方法的度明显高于化学提取方法的度.
PBET小肠阶段提供了最保守的生物可访问性结果,而SBRC的低估风险高达51%.

结论:

选择化学提取方法至关重要,并且取决于土壤的特性.
试验室方法,特别是PBET小肠阶段,对于准确评估稳定土壤对人类健康的风险至关重要.
这项研究为评估土壤稳定提供了一个框架,平衡生态效益与人类安全.

关键词:

有污染的污染物化学提取方法化学提取方法铁硫酸盐是什么铁硫酸盐是什么在体外 (in vitro) 方法稳定效应稳定效应稳定效应

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