Insights into roles of triclosan in microalgal-bacterial symbiosis system treating wastewater

Cong-Cong Tang; Tian-Yang Wang; Rong Wang; Cristiano Varrone; Zixuan Gan; Zhang-Wei He; Zhi-Hua Li; Xiaochang C Wang

doi:10.1016/j.biortech.2023.129331

Insights into roles of triclosan in microalgal-bacterial symbiosis system treating wastewater

Bioresour Technol. 2023 Oct:385:129331. doi: 10.1016/j.biortech.2023.129331. Epub 2023 Jun 23.

Authors

Cong-Cong Tang¹, Tian-Yang Wang², Rong Wang², Cristiano Varrone³, Zixuan Gan⁴, Zhang-Wei He⁵, Zhi-Hua Li², Xiaochang C Wang⁶

Affiliations

¹ Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address: cctang0820@xauat.edu.cn.
² Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
³ Department of Chemistry and BioScience, Aalborg University, Fredrik Bajers Vej 7H 9220, Aalborg Ø, Denmark.
⁴ College of Agricultural and Environmental Sciences, University of California, Davis, CA 95616-5270, United States.
⁵ Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address: zwhe@xauat.edu.cn.
⁶ Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an 710055, China.

PMID: 37355143
DOI: 10.1016/j.biortech.2023.129331

Abstract

Triclosan (TCS) is an antimicrobial agent and frequently detected in wastewater or water body. This study investigated the role of TCS in microalgal-bacterial symbiosis (MABS) system treating wastewater. The results showed that the removal efficiencies of NH₄⁺-N, total nitrogen, and total phosphorus decreased under increased TCS stress, with decrease ratios of 26.5%, 16.9%, and 34.7%. The activities of microalgae were more affected than that of bacteria. The secretion of extracellular polymeric substances (EPSs) and activity of superoxide dismutase firstly increased and then decreased with aggravated TCS stress, while the accumulation of malondialdehyde increased, leading to increased permeability of cytomembrane and bioaccumulation of TCS. In addition, the aggregation properties of microalgae and bacteria were enhanced with TCS loading increasing, and the migration of TCS was affected by enhanced EPSs secretions and MABS aggregates. This work may provide some new insights into the roles of TCS in MABS system.

Keywords: Antioxidant activity; Microbial activity; Morphological structure; Nutrient removal; Triclosan accumulation.

MeSH terms

Bacteria
Microalgae*
Symbiosis
Triclosan*
Wastewater

Substances

Wastewater
Triclosan