| 生物合成Bio-MnOx对砷污染土壤的稳定化效果分析 |
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| 引用本文： | 王华伟,吴雅静,徐榕,孙英杰,李书鹏,王亚楠,钟辰语,时昌飞.生物合成Bio-MnOx对砷污染土壤的稳定化效果分析[J].环境工程,2021,39(9):205. |
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| 作者姓名： | 王华伟 吴雅静 徐榕 孙英杰 李书鹏 王亚楠 钟辰语 时昌飞 |
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| 作者单位： | 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; |
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| 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）。 |
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| 摘 要： | 通过室内模拟实验，研究了生物合成锰氧化物（Bio-MnOx）材料对污染土壤中砷（As）的稳定化效果。结果表明:1）Bio-MnOx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-MnOx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-MnOx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-MnOx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-MnOx是一种比较有效的修复砷污染土壤的生物材料。
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| 关 键 词： | 生物合成锰氧化物(Bio-MnOx) 砷 污染土壤 稳定化 |
| 收稿时间： | 2020-11-13 |
STABILIZATION OF ARSENIC IN CONTAMINATED SOILS USING BIOLOGICAL Mn OXIDE (Bio-MnOx) |
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| Affiliation: | 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 |
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| Abstract: | Through indoor simulation experiments, the effect of biosynthetic manganese oxide (Bio-MnOx) material on the stabilization of arsenic (As) in contaminated soil was studied. The results showed that:1) the addition of Bio-MnOx 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-MnOx treatment; 3) the environmental risk analysis further confirmed that the risk of As decreased significantly after Bio-MnOx treatment; 4) bacterial biodiversity analysis based on 16s RNA indicated that the richness of soil microbial diversity increased significantly after Bio-MnOx 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-MnOx could be used as an effective biogenic material to stabilize As in soils. |
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