生物合成Bio-MnO<sub><i>x</i></sub>对砷污染土壤的稳定化效果分析

王华伟; 吴雅静; 徐榕; 孙英杰; 李书鹏; 王亚楠; 钟辰语; 时昌飞

doi:10.13205/j.hjgc.202109029

生物合成Bio-MnO_x对砷污染土壤的稳定化效果分析

doi: 10.13205/j.hjgc.202109029

1. 青岛理工大学环境与市政工程学院青岛市固体废物污染控制与资源化工程研究中心, 山东青岛 266033;
2. 北京建工环境修复股份有限公司污染场地安全修复国家工程实验室, 北京 100015

基金项目:

国家自然科学基金（41907111）；山东省重点研发项目（公益类）（2018GSF117030）；国家创新训练项目（S202010429077）。

详细信息

作者简介:
王华伟(1984-),男,博士,副教授,主要研究方向为固体废物污染控制与污染土壤修复技术。wanghuawei210@163.com

通讯作者:
王华伟(1984-),男,博士,副教授,主要研究方向为固体废物污染控制与污染土壤修复技术。wanghuawei210@163.com

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出版历程
- 收稿日期: 2020-11-13
- 网络出版日期: 2022-01-21

STABILIZATION OF ARSENIC IN CONTAMINATED SOILS USING BIOLOGICAL Mn OXIDE (Bio-MnO_x)

1. Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China;
2. National Engineering Laboratory for Site Remediation Technologies, Beijing Construction Engineering Group Environmental Remediation Co., Ltd, Beijing 100015, China

摘要

摘要: 通过室内模拟实验，研究了生物合成锰氧化物（Bio-MnO_x）材料对污染土壤中砷（As）的稳定化效果。结果表明：1）Bio-MnO_x的加入能够有效降低砷的浸出量，其中水溶性砷含量由2.28 mg/kg降至0.86 mg/kg，减少62.3%；2）五步连续法浸提结果发现，Bio-MnO_x处理后水溶态砷和表面吸附态砷的相对含量显著降低；3）风险分析进一步表明Bio-MnO_x处理后砷的环境风险降低；4）基于细菌16s RNA生物多样性分析表明，经过Bio-MnO_x处理后，土壤微生物多样性的丰富度显著增加；5）微生物群落结构分析发现，土壤微生物群落结构发生明显演替，属水平下的细菌结构由芽孢杆菌属向梭状芽孢菌属、丛毛单胞菌属、敏感梭菌属等转变。总体而言，Bio-MnO_x是一种比较有效的修复砷污染土壤的生物材料。
- 生物合成锰氧化物(Bio-MnO_x) /
- 砷 /
- 污染土壤 /
- 稳定化
Abstract: Through indoor simulation experiments, the effect of biosynthetic manganese oxide (Bio-MnO_x) material on the stabilization of arsenic (As) in contaminated soil was studied. The results showed that:1) the addition of Bio-MnO_x could effectively decrease the leaching amount of As, in which the water-soluble As content decreased from 2.28 mg/kg to 0.86 mg/kg, with a reduction efficiency of 62.3%; 2) the five-step continuous extraction results showed that the content of water-soluble As and surface-adsorbed fraction decreased significantly after Bio-MnO_x treatment; 3) the environmental risk analysis further confirmed that the risk of As decreased significantly after Bio-MnO_x treatment; 4) bacterial biodiversity analysis based on 16s RNA indicated that the richness of soil microbial diversity increased significantly after Bio-MnO_x treatment; 5) the analysis of microbial community structure showed that the dominant bacterial community structure changed from Bacillus to Clostridium, Comamonas, and Clostridium sensu tricto at the genus level. In general, Bio-MnO_x could be used as an effective biogenic material to stabilize As in soils.
- Biological Mn oxide (Bio-MnO_x) /
- arsenic /
- contaminated soil /
- stabilization

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