Revealing mechanisms of triclosan on the removal and distribution of nitrogen and phosphorus in microalgal-bacterial symbiosis system

被引：7

作者：

Chen, Sheng-Long ^{[1
,2
]}

Wang, Tian-Yang ^{[1
,2
]}

Tang, Cong-Cong ^{[1
,2
]}

Wang, Rong ^{[1
,2
]}

He, Zhang-Wei ^{[1
,2
]}

Li, Zhi-Hua ^{[1
,2
]}

Tian, Yu ^{[4
]}

Wang, Xiaochang C. ^{[1
,2
,3
]}

机构：

[1] Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Shaanxi Key Lab Environm Engn, Xian 710055, Peoples R China

[2] Xian Univ Architecture & Technol, Key Lab Northwest Water Resource Environm & Ecol, Minist Educ, Xian 710055, Peoples R China

[3] Int Sci & Technol Cooperat Ctr Urban Alternat Wate, Xian 710055, Peoples R China

[4] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2023年 / 337卷

基金：

中国国家自然科学基金;

关键词：

Nutrient removal; Microbial growth; Extracellular polymeric substance; Bio-accumulation; Microbial community structure; WASTE-WATER; RETENTION; GREEN; EPS;

D O I：

10.1016/j.envpol.2023.122539

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Microalgal-bacterial symbiosis (MABS) system performs synergistic effect on the reduction of nutrients and carbon emissions in the water treatment process. However, antimicrobial agents are frequently detected in water, which influence the performance of MABS system. In this study, triclosan (TCS) was selected to reveal the effects and mechanisms of antimicrobial agents on MABS system. Results showed that the removal efficiencies of chemical oxygen demand, NH4+-N and total phosphorus decreased by 3.0%, 24.0% and 14.3% under TCS stress. In contrast, there were no significant decrease on the removal effect of total nitrogen. Mechanism analysis showed that both the growth rate of microorganisms and the nutrients retention capacity of extracellular polymeric substances were decreased. The intracellular accumulation for nitrogen and phosphorus was promoted due to the increased cytomembrane permeability caused by lipid peroxidation. Moreover, microalgae were dominant in MABS system with ratio between microalgae and bacteria of more than 5.49. The main genus was Parachlorella, with abundance of more than 90%. Parachlorella was highly tolerant to TCS, which might be conductive to maintain its survival. This study revealed the nutrients pathways of MABS system under TCS stress, and helped to optimize the operation of MABS system.

引用

页数：10

共 56 条

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