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Arsenic Release from Soil Induced by Microorganisms and Environmental Factors

Author

Listed:
  • Yitong Yin

    (School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Ximing Luo

    (School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China
    Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China)

  • Xiangyu Guan

    (School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China
    Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China)

  • Jiawei Zhao

    (School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Yuan Tan

    (School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Xiaonan Shi

    (School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Mingtao Luo

    (School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Xiangcai Han

    (School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China
    Yantai Coastal Zone China Geological Survey, Yantai 264000, China)

Abstract

In rhizospheric soil, arsenic can be activated by both biological and abiotic reactions with plant exudates or phosphates, but little is known about the relative contributions of these two pathways. The effects of microorganisms, low-molecular-weight organic acid salts (LMWOASs), and phosphates on the migration of As in unrestored and nano zero-valent iron (nZVI)-restored soil were studied in batch experiments. The results show that As released by microbial action accounted for 17.73%, 7.04%, 92.40%, 92.55%, and 96.68% of the total As released in unrestored soil with citrate, phytate, malate, lactate, and acetate, respectively. It was only suppressed in unrestored soil with oxalate. In restored soil, As was still released in the presence of oxalate, citrate, and phytate, but the magnitude of As release was inhibited by microorganisms. The application of excess nZVI can completely inhibited As release processes induced by phosphate in the presence of microorganisms. Microbial iron reduction is a possible mechanism of arsenic release induced by microorganisms. Microorganisms and most environmental factors promoted As release in unrestored soil, but the phenomenon was suppressed in restored soil. This study helps to provide an effective strategy for reducing the secondary release of As from soils due to replanting after restoration.

Suggested Citation

  • Yitong Yin & Ximing Luo & Xiangyu Guan & Jiawei Zhao & Yuan Tan & Xiaonan Shi & Mingtao Luo & Xiangcai Han, 2022. "Arsenic Release from Soil Induced by Microorganisms and Environmental Factors," IJERPH, MDPI, vol. 19(8), pages 1-15, April.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:8:p:4512-:d:789815
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    Cited by:

    1. Liping Li & Lanfang Han & Aiju Liu & Fayuan Wang, 2022. "Imperfect but Hopeful: New Advances in Soil Pollution and Remediation," IJERPH, MDPI, vol. 19(16), pages 1-3, August.

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