| 过硫酸盐在不同类型土壤中分解产生自由基的过程机制研究 |
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| 引用本文： | 彭菲,王肖磊,方国东,高彦征. 过硫酸盐在不同类型土壤中分解产生自由基的过程机制研究[J]. 土壤, 2022, 54(6): 1210-1218 |
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| 作者姓名： | 彭菲 王肖磊 方国东 高彦征 |
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| 作者单位： | 中国科学院土壤环境与污染修复重点实验室，南京土壤研究所,南京农业大学资源与环境科学学院,中国科学院土壤环境与污染修复重点实验室，南京土壤研究所,南京农业大学资源与环境科学学院 |
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| 基金项目： | 国家重点研发计划课题项目(2017YFA0207001)和国家自然科学基金优秀青年(42022049) 资助。 |
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| 摘 要： | 基于过硫酸盐的原位化学氧化（ISCO）被广泛应用于土壤与地下水的修复，土壤性质对过硫酸盐的分解和自由基的形成过程具有重要的影响，但相关的研究较少。基于此，本文选取了我国16种不同性质的典型土壤，研究了过硫酸盐在不同类型土壤中的分解转化和自由基产生情况，并深入解析了土壤有机质、铁、锰含量和颗粒组成等对此过程的影响。结果表明，土壤有机质、土壤砂粒含量与过硫酸盐的分解速率呈显著的正相关，土壤不同形态铁、锰的含量与过硫酸盐分解速率的相关性不显著。以上结果说明了土壤有机质、砂粒可能是影响基于过硫酸盐化学氧化修复土壤的重要因素，将为过硫酸盐在土壤修复中的应用提供理论支撑。
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| 关 键 词： | 过硫酸盐；土壤；自由基；相关性分析 |
| 收稿时间： | 2022-02-11 |
| 修稿时间： | 2022-03-18 |
Study on Mechanism of Persulfate Decomposition and Free Radical Generation in Different Soil Types |
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| PENG Fei,WANG Xiaolei,FANG Guodong,GAO Yanzheng. Study on Mechanism of Persulfate Decomposition and Free Radical Generation in Different Soil Types[J]. Soils, 2022, 54(6): 1210-1218 |
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| Authors: | PENG Fei WANG Xiaolei FANG Guodong GAO Yanzheng |
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| Affiliation: | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science,College of Resources and Environmental Sciences, Nanjing Agricultural University,Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science,College of Resources and Environmental Sciences, Nanjing Agricultural University |
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| Abstract: | Persulfate-based in situ chemical oxidation (PS-ISCO) has been widely used in soil and groundwater remediation. Soil properties have an important influence on the decomposition of persulfate and generation of free radicals, but the related studies are rather limited. Therefore, we selected 16 typical soils with different properties in China and studied persulfate decomposition and free radicals generation, then further analyzed the effects of soil organic matter, iron and manganese content and particle composition on this process. The results showed that soil organic matter and soil sand content are significantly and positively correlated with the decomposition rate of persulfate, while the correlation between the content of different forms of iron and manganese and the persulfate decomposition rate is not significant. The above results indicate that soil organic matter and sand particles may be the key factors affecting the PS-ISCO, which will provide theoretical support for the application of persulfate in soil remediation |
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| Keywords: | Persulfate Soil Free radical Correlation analysis |
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