亚铁活化次氯酸钠降解土壤中阿特拉津

黄凤莲; 邹璇; 陈灿; 钟振宇; 李小明; 万勇; 刘婉蓉

doi:10.13205/j.hjgc.202102026

亚铁活化次氯酸钠降解土壤中阿特拉津

doi: 10.13205/j.hjgc.202102026

黄凤莲¹,
邹璇^1,2,
陈灿^1, ,,
钟振宇¹,
李小明²,
万勇¹,
刘婉蓉³

1. 湖南省环境保护科学研究院, 长沙 410004;
2. 湖南大学环境科学与工程学院, 长沙 410082;
3. 生态环境部固体废物与化学品管理技术中心, 北京 100029

基金项目:

国家重点研发计划（2018YFC1800400）。

详细信息

作者简介:
黄凤莲(1970-),女,博士,主要从事土壤环境管理与污染防治研究。462966135@qq.com

通讯作者:
陈灿(1972-),男,博士,高级工程师,主要从事环境科学与技术及相关政策研究。28928336@qq.com

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- 文章访问数: 174
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- 被引次数: 0
出版历程
- 收稿日期: 2020-02-28
- 网络出版日期: 2021-07-19

DEGRADATION OF ATRAZINE BY FERROUS ACTIVATED SODIUM HYPOCHLORITE

1. Hunan Research Academy of Environmental Sciences, Changsha 410004, China;
2. College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;
3. Solid Waste and Chemicals Management Center, Ministry of Environmental Protection, Beijing 100029, China

摘要

摘要: 通过考察NaClO添加量、n（Fe²⁺）：n（NaClO）、反应时间、土壤pH、腐植酸与无机阴离子对阿特拉津降解效率的影响，对比Fe²⁺/NaClO氧化处理后土壤微生物群落的变化情况，探究了FeSO₄活化NaClO对土壤中阿特拉津的降解性能。结果表明：当NaClO添加量为10 mmol，n（Fe²⁺）：n（NaClO）为1：1时，阿特拉津降解效率最佳，为82%；其降解符合一级反应动力学模型；Fe²⁺/NaClO体系比单独的NaClO可产生更多的·OH参与阿特拉津降解；降解过程受土壤pH（3~9）影响较小；腐植酸和无机阴离子（Cl^-、HCO₃^-）对阿特拉津降解有消极影响。经过Fe²⁺/NaClO处理后土壤微生物门类丰度发生明显变化，如Proteobacteria门丰度由25.46%变化为72.73%。
- 亚铁活化 /
- 次氯酸钠 /
- 阿特拉津 /
- 土壤修复 /
- 微生物群落
Abstract: This study investigated the feasibility of atrazine degradation in soil by using Fe²⁺-activated hypochlorite (NaClO). The effect of main factors such as oxidant dosage, the Fe²⁺ to NaClO molar ratio, initial soil pH, etc. on the degradation of atrazine was considered. The results showed that after 8 h reaction, 82% of atrazine could be degraded when NaClO dosage was 10 mmol at Fe²⁺/NaClO molar ratio of 1:1. The degradation of atrazine followed the pseudo-first-order model. ESR result confirmed that the Fe²⁺/NaClO system yielded more HO· than that of NaOCl alone to participate in atrazine degradation. The Fe²⁺/NaClO process could operate over a wide pH range (3~9), while humic acid and inorganic anions (Cl^-, HCO₃^-) in the soil matrix had a negative effect on atrazine degradation. After the Fe²⁺/NaClO treatment, the soil microbial community was obviously affected, and the relative abundance of Proteobacteria rose from 25.46% to 72.73%.
- ferrous activation /
- sodium hypochlorite /
- atrazine /
- soil remediation /
- microbial community

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