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微生物介导的硫氧化与酸盐减少相结合,在受矿山影响的寡质息地内发生氧化

Xiaoxu Sun^1,2, Qizhi Chen^1,3, Max M Häggblom⁴

¹National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.

The ISME journal

|June 20, 2024

概括

在矿山尾矿中,化学性降解,特别是与降解 (SOAsR) 结合的硫氧化,比异质性过程更为普遍. 这项研究确定了驱动SOAsR的关键细菌,为补救提供了洞察力.

科学领域:

环境微生物学环境微生物学
生物地质化学生物地质化学
环境整治环境整治

背景情况:

土壤中污染构成全球健康风险,主要是由于酸盐[As(V]的减少和随后的释放.
虽然异构性As(V) 减少得到了很好的研究,但化学性氧化途径,特别是与As(V) 减少 (SOAsR) 相结合的硫氧化,理解程度较低,特别是在矿山尾矿等寡制性环境中.

研究的目的:

通过SOAsR在As污染的矿山尾矿中研究化学石质降低的发生率和机制.
确定对SOAsR负责的微生物群落,并探索影响该过程的地化学因素.

主要方法:

利用DNA稳定同位素探测和元基因组分类来识别微生物参与者.
进行了基因组挖掘,以扩大潜在的氧化硫As(V) 降解细菌 (SOAsRB) 清单.
使用元基因组学分析了来自中国南部的多个矿山尾部样本.

主要成果:

发现SOAsR比异质性As (V) 减少在寡质性矿山尾矿中更为普遍.
在水中溶解的减少硫度被确定为影响SOAsR的关键地化学参数.
确定了硫菌,拉姆利巴克特和硫菌作为主导的SOAsRB,其中Burkholderiaceae和Rhodocyclaceae系的潜在贡献.

结论:

化学石质变性SOAsR是As污染的矿山尾矿中的一个重要过程.
识别的SOAsRB和影响因素为了解这些环境中的生物地质化学提供了基础.
发现可以为污染的矿场开发生物修复策略提供信息.

关键词:

减少酸盐的减少基因组采矿是如何进行的稳定同位素探测探测稳定同位素探测氧化硫氧化硫的过程

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