Evaluating effects of tetrabromobisphenol A and microplastics on anaerobic granular sludge: Physicochemical properties, microbial metabolism, and underlying mechanisms

被引：1

作者：

Wei, Lixin ^{[1
]}

Li, Junjian ^{[1
]}

Wang, Zi ^{[1
]}

Wu, Jinyan ^{[1
]}

Wang, Shuying ^{[1
]}

Cai, Zhexiang ^{[1
]}

Lu, Yuxiang ^{[2
]}

Su, Chengyuan ^{[1
,2
]}

机构：

[1] Guangxi Normal Univ, Guangxi Key Lab Environm Proc & Remediat Ecol Frag, 15 Yucai Rd, Guilin 541004, Peoples R China

[2] Guangxi Normal Univ, Minist Educ, Key Lab Ecol Rare & Endangered Species & Environm, 15 Yucai Rd, Guilin 541004, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2024年 / 359卷

关键词：

Anaerobic granular sludge; Tetrabromobisphenol A; Polystyrene microplastics; Polybutylene succinate microplastics; Functional genes; EXTRACELLULAR POLYMERIC SUBSTANCES; DISSOLVED ORGANIC-MATTER; WASTE-WATER; TBBPA; BIODEGRADATION; ADSORPTION; COMMUNITY; CHEMICALS; MBR;

D O I：

10.1016/j.jenvman.2024.121077

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Tetrabromobisphenol A (TBBPA) and microplastics are emerging contaminants of widespread concern. However, little is known about the effects of combined exposure to TBBPA and microplastics on the physicochemical properties and microbial metabolism of anaerobic granular sludge. This study investigated the effects of TBBPA, polystyrene microplastics (PS MP) and polybutylene succinate microplastics (PBS MP) on the physicochemical properties, microbial communities and microbial metabolic levels of anaerobic granular sludge. The results showed that chemical oxygen demand (COD) removal of sludge was lowest in the presence of TBBPA alone and PS MP alone with 33.21% and 30.06%, respectively. The microorganisms promoted the secretion of humic substances under the influence of TBBPA, PS MP and PBS MP. The lowest proportion of genes controlling glycolytic metabolism in sludge was 1.52% when both TBBPA and PS MP were added. Microbial reactive oxygen species were increased in anaerobic granular sludge exposed to MPS. In addition, TBBPA treatment decreased electron transfer of the anaerobic granular sludge and disrupted the pathway of anaerobic microorganisms in acquiring adenosine triphosphate, and MPs attenuated the negative effects of TBBPA on the acetate methanogenesis process of the anaerobic granular sludge. This study provides a reference for evaluating the impact of multiple pollutants on anaerobic granular sludge.

引用

页数：11

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