Microbial Sulfur and Arsenic Oxidation Facilitate the Establishment of Biocrusts during Reclamation of Degraded Mine Tailings,Environmental Science & Technology

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Microbial Sulfur and Arsenic Oxidation Facilitate the Establishment of Biocrusts during Reclamation of Degraded Mine Tailings
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2024-06-20 , DOI: 10.1021/acs.est.3c10945
Xiaoxu Sun _{1,

2} , Tianle Kong _{1,

2,

3} , Duanyi Huang _{1,

2,

4} , Zhenyu Chen _{1,

2,

5} , Yuxue Zhang _{1,

2} , Max M Häggblom ₆ , Mohsen Soleimani ₇ , Huaqing Liu _{1,

2} , Youhua Ren _{1,

2,

8} , Yize Wang _{1,

2} , Ying Huang _{1,

2} , Baoqin Li _{1,

2} , Weimin Sun _{1,

2}

Affiliation

National-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.
Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control,Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China.
Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, New Jersey 08901, United States.
Department of Natural Resources, Isfahan University of Technology, Isfahan 84156-83111, Iran.
College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China.

Degraded tailings generated by the mining of metal ores are major environmental threats to the surrounding ecosystems. Tailing reclamation, however, is often impeded due to adverse environmental conditions, with depleted key nutrients (i.e., nitrogen (N) and phosphorus (P)) and elevated sulfur and metal(loid) concentrations. Formation of biocrusts may significantly accelerate nutrient accumulation and is therefore an essential stage for tailing reclamation. Although suggested to play an important role, the microbial community composition and key metabolisms in biocrusts remain largely unknown and are therefore investigated in the current study. The results suggested that sulfur and arsenic oxidation are potential energy sources utilized by members of predominant biocrust bacterial families, including Beijerinckiaceae, Burkholderiaceae, Hyphomicrobiaceae, and Rhizobiaceae. Accordingly, the S and As oxidation potentials are elevated in biocrusts compared to those in their adjacent tailings. Biocrust growth, as proxied by chlorophyll concentrations, is enhanced in treatments supplemented with S and As. The elevated biocrust growth might benefit from nutrient acquisition services (i.e., nitrogen fixation and phosphorus solubilization) fueled by microbial sulfur and arsenic oxidation. The current study suggests that sulfur- and arsenic-oxidizing microorganisms may play important ecological roles in promoting biocrust formation and facilitating tailing reclamation.

中文翻译：

微生物硫和砷氧化促进退化尾矿回收过程中生物结皮的形成

金属矿石开采产生的降解尾矿是对周围生态系统的主要环境威胁。然而，尾矿回收常常因不利的环境条件而受到阻碍，主要营养物质（即氮（N）和磷（P））耗尽，硫和金属（类）浓度升高。生物结皮的形成可以显着加速养分积累，因此是尾矿回收的重要阶段。尽管被认为发挥着重要作用，但生物结皮中的微生物群落组成和关键代谢仍然很大程度上未知，因此在当前的研究中进行了研究。结果表明，硫和砷的氧化是主要生物结皮细菌家族成员利用的潜在能源，包括Beijerinckiaceae 、 Burkholderiaceae 、 Hyphomicrobiaceae和Rhizobiaceae 。因此，与相邻尾矿中的硫和砷氧化电位相比，生物结皮中的硫和砷氧化电位升高。以叶绿素浓度为代表的生物结皮生长在补充硫和砷的处理中得到增强。生物结皮生长的加快可能受益于微生物硫和砷氧化促进的养分获取服务（即固氮和磷溶解）。目前的研究表明，硫氧化和砷氧化微生物可能在促进生物结皮形成和促进尾矿回收方面发挥重要的生态作用。

更新日期：2024-06-20

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