Enhanced nitrogen removal of micropolluted source waterbodies using an iron activated carbon system with siliceous materials: Insights into metabolic activity, biodiversity, interactions of core genus and co-existence

Honghong Guo; Xuanzi Zhangsun; Na Li; Xiang Liu; Haihan Zhang; Tinglin Huang

doi:10.1016/j.biortech.2023.129656

Enhanced nitrogen removal of micropolluted source waterbodies using an iron activated carbon system with siliceous materials: Insights into metabolic activity, biodiversity, interactions of core genus and co-existence

Bioresour Technol. 2023 Nov:387:129656. doi: 10.1016/j.biortech.2023.129656. Epub 2023 Aug 16.

Authors

Honghong Guo¹, Xuanzi Zhangsun¹, Na Li¹, Xiang Liu¹, Haihan Zhang¹, Tinglin Huang²

Affiliations

¹ Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, 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; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
² Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, 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; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address: huangtinglin@xauat.edu.cn.

PMID: 37595809
DOI: 10.1016/j.biortech.2023.129656

Abstract

Aerobic denitrification technology can effectively abate the nitrogen pollution of water source reservoirs. In this study, 40% siliceous material was used as the carrier to replace the activated carbon in Fe/C material to enhance denitrification and purify water. The removal efficiency of new material for target pollutants were nitrate nitrogen (95.68%), total phosphorus (68.23%) and chemical oxygen demand (46.20%). Aerobic denitrification of water samples and anaerobic denitrification of sediments in three systems jointly assisted nitrogen removal. In a reactor with new material, diversity and richness of denitrifying bacterial communities were enhanced, and the symbiotic structure of aerobic denitrifying bacteria was more complex (Bacillus and Mycobacteria as the dominant bacteria); the microbial distribution better matched the Zif and Mandelbrot models. This system significantly increased the abundance of key enzymes in water samples. The new material effectively removed pollutants and represents a promising and innovative in-situ remediation method for reservoirs.

Keywords: Aerobic denitrification; Drinking water safety; Functional gene prediction; Microbial community structure; Siliceous material.

MeSH terms

Biodiversity
Charcoal*
Denitrification
Environmental Pollutants*
Iron

Substances

Charcoal
Environmental Pollutants
Iron