受污染农田土壤中锌同位素的变化机制研究

Journal of hazardous materials Pub Date : 2024-11-05 Epub Date: 2024-08-18 DOI:10.1016/j.jhazmat.2024.135561
Jing Kong, Fang Huang, Rongfei Wei, Xingchao Zhang, Guangxu Zhu, Qingjun Guo
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引用次数: 0

摘要

锌同位素有助于阐明锌在农田土壤中的迁移、转化和来源贡献。然而,目前对农田土壤中不同最终成分锌同位素值的研究尚不全面,不同污染区不同因素引起的农田土壤中锌同位素的变化尚不清楚,这阻碍了锌同位素示踪方法在农田土壤中的应用。因此,选择中国西南地区铅锌矿污染农田为研究对象,系统采集不同锌污染的最终元素和农田土壤样品,分析锌的含量、组分和同位素组成。分析了土壤中不同末端元素及冲刷、有机吸附和无机吸附过程对锌同位素组成的影响,并分析了这三个过程与环境变量之间的关系,阐明了其变化机理。研究结果丰富了锌同位素的分馏机制,拓展了锌同位素在溯源中的应用,为农田土壤锌污染修复提供了地球化学证据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the variation mechanism of Zn isotope in polluted farmland soil.

Zn isotope can help to clarify the migration, transformation and source contribution of Zn in farmland soil. However, the research on Zn isotope value of different end members in farmland soil is incomprehensive, and the variation of Zn isotope in farmland soil caused by different factors in different polluted areas is unclear, which hinders the usage of Zn isotope tracing method in farmland soil. Thus, a Pb-Zn mine polluted farmland in southwest China was selected as the research object and the end elements and farmland soil samples with different Zn contamination were systematically collected to analyse Zn content, fraction and isotopic composition. The effects of different end members and processes of eluviation, organic adsorption and inorganic adsorption on Zn isotopic composition in soil were analysed, and the relationship between these three processes and environmental variables was analysed to clarify the change mechanism. The results can enrich the fractionation mechanism of Zn isotopes, expand the application of Zn isotope in tracing the sources, and provide geochemical evidence for remediation of Zn pollution in farmland soil.

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