College of Environmental and Resource Science, Zhejiang University, Hangzhou, Zhejiang, China; Zhejiang Province Key Lab Water Pollution Control & Environment, Zhejiang University, Hangzhou, Zhejiang, China.
Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.
Water Res. 2021 Jun 1;197:117082. doi: 10.1016/j.watres.2021.117082. Epub 2021 Mar 23.
Being an energetic fuel, methane is able to support microbial growth and drive the reduction of various electron acceptors. These acceptors include a broad range of oxidized contaminants (e.g., nitrate, nitrite, perchlorate, bromate, selenate, chromate, antimonate and vanadate) that are ubiquitously detected in water environments and pose threats to human and ecological health. Using methane as electron donor to biologically reduce these contaminants into nontoxic forms is a promising solution to remediate polluted water, considering that methane is a widely available and inexpensive electron donor. The understanding of methane-based biological reduction processes and the responsible microorganisms has grown in the past decade. This review summarizes the fundamentals of metabolic pathways and microorganisms mediating microbial methane oxidation. Experimental demonstrations of methane as an electron donor to remove oxidized contaminants are summarized, compared, and evaluated. Finally, the review identifies opportunities and unsolved questions that deserve future explorations for broadening understanding of methane oxidation and promoting its practical applications.
作为一种高能燃料，甲烷能够支持微生物生长，并驱动各种电子受体的还原。这些受体包括广泛存在于水环境中的各种氧化污染物（如硝酸盐、亚硝酸盐、高氯酸盐、溴酸盐、硒酸盐、铬酸盐、锑酸盐和钒酸盐），它们对人类和生态健康构成威胁。利用甲烷作为电子供体，通过生物还原将这些污染物转化为无毒形式，是修复受污染水的一种很有前途的方法，因为甲烷是一种广泛可用且廉价的电子供体。在过去的十年中，人们对基于甲烷的生物还原过程和相关微生物的理解有了很大的提高。本综述总结了微生物甲烷氧化过程中的代谢途径和微生物介导机制。对甲烷作为电子供体去除氧化污染物的实验进行了总结、比较和评价。最后，本综述确定了未来值得进一步探索的机会和未解决的问题，以拓宽对甲烷氧化的理解并促进其实际应用。
Zotero 插件