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关于通过基于SRB的修复技术降低土壤反生物可用性的社区生态研究

Min Zhang¹, Jing Xiong², Lei Zhou³

¹School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China.

Journal of hazardous materials

|August 11, 2023

概括

减少硫酸盐的细菌稳定土壤中的反 (Sb). 酸增加了58.40%的Sb稳定性,改变了细菌群落,促进了有益的微生物相互作用以进行补救.

科学领域:

环境微生物学环境微生物学
生物修复是一种生物修复.
地质化学地质化学

背景情况:

减少硫酸盐的细菌 (SRB) 显示出稳定土壤反 (Sb) 的潜力.
电子捐赠者/接受者的特定作用和管理SRB介导的Sb修复的生态原则尚未完全理解.
调查提高SRB效率的因素对于有效的土壤整治至关重要.

研究的目的:

为了研究Desulfovibrio desulfuricans在稳定土壤Sb.b.的有效性.
评估酸 (HA) 和硫酸 (Na2SO4) 作为SRB介导的Sb稳定增强剂的影响.
阐明这些增强剂对土壤细菌社区结构,功能和组装过程的影响.

主要方法:

使用Desulfovibrio desulfuricansATCC 7757用于土壤Sb稳定性的微观实验.
酸 (HA) 或硫酸 (Na2SO4) 的应用,以评估它们的增强作用.
细菌社区分析使用高通量测序来确定多样性,组成和组装模式.

主要成果:

在SRB+HA治疗中,Sb稳定率达到58.40%的最高水平.
SRB显著改变了土壤细菌多样性,社区组成和组装过程,同质选择占主导地位.
和Na2SO4都影响了微生物群落的继承,但具有不同的效果:Na2SO4促进了SRB介导的减少和N/S循环相互作用,而增强了电子的可用性和与耐金属/碳水化合物降解细菌的相互作用.

结论:

酸是SRB介导的土壤中Sb稳定的一种高度有效的增强剂.
SRB显著重塑土壤微生物群落,有利于均的选择过程.
无论是Na2SO4还是HA,都促进了仿真硫酸盐的减少,但通过不同的机制影响微生物社区相互作用和与Sb修复相关的功能.

关键词:

广泛的电子捐赠者土壤Sb生物可用性特定的电子接受器是特定的电子接受器.减少硫酸盐的细菌可以减少硫酸盐.

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