地球科学进展

地球科学进展 ›› 2020, Vol. 35 ›› Issue (10): 1052 -1063. doi: 10.11867/j.issn.1001-8166.2020.084

综述与评述 上一篇    下一篇

含铁介质稳定砷与根际微生物的相互作用
殷怡童( ),罗锡明( )   
  1. 中国地质大学（北京）海洋学院，北京 100083
  • 收稿日期:2020-07-15 修回日期:2020-09-20 出版日期:2020-10-10
  • 通讯作者: 罗锡明 E-mail:kaqichuan@163.com;luoxm@cugb.edu.cn
  • 基金资助:
    中国地质调查局地质调查项目“莱州—莱西一带矿集区生态修复支撑调查”(DD20208080);国家自然科学基金项目“纳米零价铁在含水层中的腐蚀过程与产物演化对三氯乙烯去除的影响机理研究”(41572229)

Interactions Between Stabilized Arsenic by Fe-based Media and Soil Microbes in the Rhizosphere

Yitong Yin( ),Ximing Luo( )   

  1. School of Ocean Sciences，China University of Geosciences（Beijing），Beijing 100083，China
  • Received:2020-07-15 Revised:2020-09-20 Online:2020-10-10 Published:2020-11-30
  • Contact: Ximing Luo E-mail:kaqichuan@163.com;luoxm@cugb.edu.cn
  • About author:Yin Yitong (1997-), female, Dinghai City, Zhejiang Province, Master student. Research areas include pollution remediation. E-mail: kaqichuan@163.com
  • Supported by:
    the China Geology Survey “Ecological restoration support survey of the laizhou-laixi ore concentration area”(DD20208080);The National Natural Science Foundation of China "Influence mechanism of Trichloroethylene removal by corrosion processes and product evolution of nano-zero-valent iron in aquifers"(41572229)
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对原位修复后植物复植区土壤中被稳定砷的稳定性进行评估是环境风险评价的重要内容，含铁介质稳定砷与根际微生物的相互作用是环境风险评价的关键。根据近5年的相关研究进展，从含铁介质修复砷污染土壤、砷污染土壤中的微生物群落结构特征及根际微生物参与的含铁介质中砷的释放过程3个方面来进行综述。综述发现，含铁介质是稳定土壤中砷的重要材料，但修复效果易受到环境变化和微生物作用的影响。在含铁介质稳定砷之后，土壤中的微生物群落会受到修复试剂的影响进而形成新的群落结构，而在继续进行植物复植后，由于根际环境作用，微生物群落结构还会发生进一步的演化从而最终形成新的微生物群落结构。在这个演化过程中，微生物与所接触的砷和铁的界面反应是影响土壤中砷的稳定性的重要因素，因此研究含铁介质稳定砷与根际微生物的相互作用具有重要意义。此外，对植物复植后根际微生物与含铁介质稳定砷的稳定性之间的关系进行了展望，旨在为更好地认识土壤复杂环境中砷的迁移提供参考。

关键词: 含铁介质, 砷污染土壤, 稳定化, 微生物群落结构, 微生物还原

Assessment of the stability of stabilized arsenic in soils in revegetated areas after in-situ restoration has been regarded as a key component in environmental risk assessment， while the interaction between stabilized arsenic by Fe-based media and soil microbes in the rhizosphere is also critical for environmental risk assessment. According to the relevant research progress in the last five years， the paper elucidated three key aspects of this problem： Arsenic-contaminated soil remediation with iron containing media， structural characterization of microbial communities in arsenic-contaminated soil， and the arsenic-releasing process that involves the participation of rhizosphere microorganisms on the Fe-based media. This review finds that Fe-based media is an essential material for stabilizing arsenic in soil， but its impact is strongly affected by circumstance change and microbial action. After arsenic stabilization， microbial communities in the soil would be changed by Fe-based reagents， then the further evolution of microbial community structure will occur during continuing revegetation because of rhizosphere effect， and finally new microbial communities will form. In this process， the interface reaction between rhizosphere microbes and iron containing media with arsenic is an important factor affecting the stability of arsenic in soils. Therefore， it is of great significance to understand this interaction in the future. Furthermore，the reaction between rhizosphere microorganisms in revegetated areas and the stability of stabilized arsenic was also discussed. The purpose of this paper was to provide more information for the mobility of arsenic in the complex soil environment.

Key words: Fe-based media, Arsenic-contaminated soil, Stabilization, Microbial community structure, Microbial reduction

中图分类号: 

图1 以砷为关键词的共现网络图
Fig.1 A co-occurrence network with arsenic as the key word
表1 含铁介质修复土壤效果案例
Table 1 Cases of soil remediation effect by Fe-based media
土壤类型 土壤pH 砷浓度/（mg/kg） 含铁介质 用量 修复效率/%
矿区石灰性始成土[ 34 ] 7.6 3 197 施威特曼石（FeOS） 10% 99
矿山壤砂土[ 15 ] 8.2 247 水铁矿 5% 91
金锑矿的沉积区[ 24 ] 4.6 479 合成水铁矿 3% 84
金锑矿的沉积区[ 24 ] 4.6 479 氯化铁+石灰 1∶1 71
金锑矿的沉积区[ 24 ] 4.6 479 零价铁粉末 1% 90
砷污染土壤[ 27 ] 7.4 228 机械活化褐铁矿 10% 78
矿山边缘土壤[ 35 ] 6.3 2 548 磁赤铁矿纳米颗粒 5% 99
棕地子区域A[ 31 ] 6.4 70 200 零价纳米铁 10% 92
棕地子区域B[ 31 ] 6.4 25 900 零价纳米铁 10% 91~95
自然高砷土壤[ 36 ] 6.1 15 910 零价铁纳米粉 1% 60
砷污染土壤[ 13 ] 3.6 1 400

铁铈氧化物

铁铈氧化物

铁铈氧化物

2%

2%

2%

 84~98
砷污染土壤[ 13 ] 7.2 200
砷污染土壤[ 13 ] 5.0 800
图2 砷污染土壤优势菌
Fig.2 Dominant bacteria in arsenic-contaminated soil
图3 砷释放途径
Fig.3 Pathways of arsenic release
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