Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 28, Issue 4, Pages 4749-4761Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-10709-z
Keywords
DNRA bacteria; Constructed wetland; Anammox; Denitrification; Environmental factors; Anaeromyxobacter
Categories
Funding
- National Natural Science Foundation of China [21777086, 22076100]
- Taishan Scholar Youth Expert Program of Shandong Province [tsqn201909005]
- Key Research & Developmental Program of Shandong Province [2019JZZY020308]
- Natural Science Foundation for Distinguished Young Scholars of Shandong Province [JQ201809]
- Natural Science Foundation of Shandong Province [ZR2018ZC2362]
- Young Scholars Program of Shandong University [2016WLJH16, 2020QNQT012]
- Open Project Program of State Key Laboratory of Petroleum Pollution Control [PPC2018007]
- CNPC Research Institute of Safety and Environmental Technology
- Qingdao Science and Technology Huimin Demonstration Guide Project [20-3-44-nsh]
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The study found that the abundance of DNRA bacteria in multistage constructed wetlands is negatively correlated with environmental factors and positively correlated with the efficiency of nitrate removal.
Dissimilatory nitrate reduction to ammonium (DNRA) is an important process of nitrate reduction in the environment. The distribution of DNRA bacteria and the relationships with environmental factors in multistage constructed wetland were investigated in this study. The quantitative real-time polymerase chain reaction analysis showed that the abundance of DNRA bacteria at all sites ranged from 2.10 x 10(10)to 1.10 x 10(11)copies/g of dry sediments. TheAnaeromyxobacter(belong toDeltaproteobacteria) was the most abundant DNRA bacteria at all sites. TheGeobaterknown as DNRA bacteria was also identified in this study. The abundances of DNRA bacteria, denitrifying bacteria, and anammox bacteria were conspicuously negatively correlated with Eh and positively correlated with the NO3--N removal efficency by statistical analysis.
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