成果归属作者：

陈男 ; 冯传平

成果归属机构：

水资源与环境学院

作者：

Zhao, Chaorui ; Guo, Qiuzhi ; Chen, Nan ; Liu, Tong ; Hu, Yutian ; Feng, Chuanping

单位：

China Univ Geosci Beijing, Sch Water Resources & Environm, MOE Key Lab Groundwater Circulat & Environm Evolut, Beijing 100083, Peoples R China;Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing Key Lab Mineral Environm Funct, Beijing 100871, Peoples R China;Natl Inst Clean & Low Carbon Energy, State Key Lab Water Resource Protect & Utilizat Co, Beijing 102209, Peoples R China

关键词：

SULFIDE

摘要：

The increasing sulfate content has become a burgeoning global water environmental issue. Enhancing the environmental adaptability and robustness of microbial sulfate reduction is crucial for developing efficient and reliable sulfate removal technologies. This study leverages the characteristics of the Maifanite trace element slow-release repository, along with the microbial adhesion protective function of Polyvinyl Alcohol-Sodium Alginate (PVA-SA), with the aim of developing a novel composite material-Polyvinyl Alcohol-Sodium Alginate-Maifanite (PVA-SA-MA). This material is designed to enhance the environmental adaptability of SulfateReducing Bacteria (SRB) by concurrently providing active substances and adhesion sites, thereby improving sulfate removal efficiency under adverse conditions. The composite's impact was evaluated under various environmental conditions including pH, C/S ratio, salinity, and temperature variations. Results indicate that, compared to the addition of maifanite alone, PVA-SA-MA significantly enhances the robustness of SRB to environmental changes. PVA-SA-MA successfully promoted microbial activity, reduced microbial death, and increased microbial load. Under test conditions, PVA-SA-MA increased the sulfate reduction rate by 5.6-fold, with the highest reduction efficiency reaching up to 11.4-fold. Additionally, PVA-SA-MA promotes microbial synergy, providing conditions for the microbial adaptation process. This study reveals that providing attachment sites, supplementing active stimulants, and enhancing microbial community synergy are the main mechanisms by which PVA-SA-MA improves SRB performance. These findings not only deepen our theoretical understanding of microbe-material interactions but also provide new insights into the application of maifanite for treating sulfate wastewater in challenging environment.

基金：

National Nat-ural Science Foundation of China (NSFC) [42077163]; Funda-mental Research Funds for the Central Universities [2652019281]; Postdoctoral Fellowship Program of CPSF [GZB20240008]

语种：

英文

DOI：

10.1016/j.cej.2024.157180

来源：

CHEMICAL ENGINEERING JOURNAL,2024():.

出版日期：

2024-11-15

提交日期：

2024-11-19

引用参考：

Zhao, Chaorui; Guo, Qiuzhi; Chen, Nan; Liu, Tong; Hu, Yutian; Feng, Chuanping. PVA-SA-maifanite activator toward Robust sulfate reduction in challenging environments[J]. CHEMICAL ENGINEERING JOURNAL,2024():.