Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China.
Institute for Crop and Soil Science Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Bundesallee 69, 38116, Braunschweig, Germany.
Environ Sci Pollut Res Int. 2022 Jan;29(2):1763-1787. doi: 10.1007/s11356-021-17117-x. Epub 2021 Oct 28.
Over several decades, arsenic (As) toxicity in the biosphere has affected different flora, fauna, and other environmental components. The majority of these problems are linked with As mobilization due to bacterial dissolution of As-bearing minerals and its transformation in other reservoirs such as soil, sediments, and ground water. Understanding the process, mechanism, and various bacterial species involved in these processes under the influence of some ecological variables greatly contributes to a better understanding of the fate and implications of As mobilization into the environments. This article summarizes the process, role, and various types of bacterial species involved in the transformation and mobilization of As. Furthermore, insight into how Fe(II) oxidation and resistance mechanisms such as methylation and detoxification against the toxic effect of As(III) was highlighted as a potential immobilization and remediation strategy in As-contaminated sites. Furthermore, the significance and comparative advantages of some useful analytical tools used in the evaluation, speciation, and analysis of As are discussed and how their in situ and ex situ applications support assessing As contamination in both laboratory and field settings. Nevertheless, additional research involving advanced molecular techniques is required to elaborate on the contribution of these bacterial consortia as a potential agronomic tool for reducing As availability, particularly in natural circumstances. Graphical abstract. Courtesy of conceptual model: Aminu Darma.
几十年来，砷（As）在生物圈中的毒性已经影响了不同的植物、动物和其他环境成分。这些问题主要与由于细菌溶解含砷矿物及其在土壤、沉积物和地下水等其他储层中的转化而导致的砷迁移有关。了解这些过程在一些生态变量影响下的过程、机制和涉及的各种细菌种类，有助于更好地了解砷迁移到环境中的命运和影响。本文总结了在砷的转化和迁移过程中涉及的过程、作用和各种细菌种类。此外，还深入探讨了 Fe(II)氧化和抗性机制，如甲基化和解毒，以抵抗 As(III)的毒性效应，这是砷污染场地潜在的固定和修复策略。此外，还讨论了一些在评价、形态分析和砷分析中使用的有用分析工具的意义和比较优势，以及它们的原位和异位应用如何支持在实验室和现场环境中评估砷污染。然而，需要进一步的研究来利用先进的分子技术来阐述这些细菌联合体作为一种减少砷有效性的潜在农业工具的贡献，特别是在自然环境中。图片说明：由 Aminu Darma 提供的概念模型。
