文献类型：期刊文献

英文题名：Effects of cadmium sulfide nanoparticles on sulfate bioreduction and oxidative stress in Desulfovibrio desulfuricans

作者：Cheng, Guoqing[1];Ding, Huili[1];Chen, Guanglin[1];Shi, Hongjie[1];Zhang, Xu[1];Zhu, Minglong[1];Tan, Wensong[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：9

期号：1

外文期刊名：BIORESOURCES AND BIOPROCESSING

收录：;EI(收录号：20224513080526);WOS:【SCI-EXPANDED(收录号:WOS:000777142100001)】；

基金：This work was supported by National Natural Science Foundation of China (No. 21878083) and the Open Project Funding of State Key Laboratory of Bioreactor Engineering of China.

语种：英文

外文关键词：Desulfovibrio desulfuricans; Cadmium sulfide nanoparticles; Sulfate reduction; Extracellular polymeric substances (EPS); Oxidative stress

摘要：Sulfate-containing wastewater has a serious threat to the environment and human health. Microbial technology has great potential for the treatment of sulfate-containing wastewater. It was found that nano-photocatalysts could be used as extracellular electron donors to promote the growth and metabolic activity of non-photosynthetic microorganisms. However, nano-photocatalysts could also induce oxidative stress and damage cells. Therefore, the interaction mechanism between photosynthetic nanocatalysts and non-photosynthetic microorganisms is crucial to determine the regulatory strategies for microbial wastewater treatment technologies. In this paper, the mechanism and regulation strategy of cadmium sulfide nanoparticles (CdS NPs) on the growth of sulfate-reducing bacteria and the sulfate reduction process were investigated. The results showed that the sulfate reduction efficiency could be increased by 6.4% through CdS NPs under light conditions. However, the growth of Desulfovibrio desulfuricans C09 was seriously inhibited by 55% due to the oxidative stress induced by CdS NPs on cells. The biomass and sulfate reduction efficiency could be enhanced by 6.8% and 5.9%, respectively, through external addition of humic acid (HA). At the same time, the mechanism of the CdS NPs strengthening the sulfate reduction process by sulfate bacteria was also studied which can provide important theoretical guidance and technical support for the development of microbial technology combined with extracellular electron transfer (EET) for the treatment of sulfate-containing wastewater.