[1] Huang Juan, Cao Meifang, Ma Yixuan, Liu Jialiang, et al. Wastewater treatment performance and microbial communitystructure in the constructed wetland under double-pressureof low temperature and Ag NPs exposure [J]. Journal of Southeast University (English Edition), 2022, 38 (3): 291-299. [doi:10.3969/j.issn.1003-7985.2022.03.011]

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Wastewater treatment performance and microbial communitystructure in the constructed wetland under double-pressureof low temperature and Ag NPs exposure()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

38

Issue:

2022 3

Page:

291-299

Research Field:

Environmental Science and Engineering

Publishing date:

2022-09-20

Info

Title:

Wastewater treatment performance and microbial communitystructure in the constructed wetland under double-pressureof low temperature and Ag NPs exposure

Author(s):

Huang Juan;  Cao Meifang;  Ma Yixuan;  Liu Jialiang;  Guan Wenzhu

School of Civil Engineering, Southeast University, Nanjing 211189, China

Keywords:

silver nanoparticles;  constructed wetland;  wastewater treatment;  low temperature;  microbial community structure;  water quality

PACS:

P941.78

DOI:

10.3969/j.issn.1003-7985.2022.03.011

Abstract:

To investigate the effects of silver nanoparticles(Ag NPs)and low temperature double-pressure on the wastewater treatment efficacy and the microbial community structure of constructed wetlands, a pilot-scale vertical flow constructed wetland was set up to treat synthetic wastewater under laboratory conditions. By measuring the effluent concentration of ammonia nitrogen(NH⁺₄-N), total nitrogen(TN), total phosphorus(TP), chemical oxygen demand(COD), and the diversity, richness, and community structure of microorganisms of the upper and lower soil layers in the wetland, the nutrient removal effect of the constructed wetland and the changes in the microflora of the soil layer were studied. The results reveal that the correlation coefficients between the removal rates of TN and NH⁺₄-N and the temperature are 0.463 and 0.692, respectively, indicating a significant positive correlation. From the warm to the cold season, both the diversity and richness of microorganisms in the lower soil layer of wetlands are inhibited under the double-pressure of Ag NPs and low temperature, and the abundances of the denitrogenation functional bacteria such as Candidatus nitrososphaera, Sulfuritalea, Anaeromyxobacter, Candidatus solibacter, Nitrospira, and Zoogloea are altered. Low temperature and Ag NPs exposure can thus affect the wastewater treatment performance of constructed wetlands, possibly because of the seasonal changes of the microflora.

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Memo

Memo:

Biography: Huang Juan(1980— ), female, doctor, professor, 101010942@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No. 50909019, 51479034), the Fundamental Research Funds for the Central Universities(No. 2242019K40064).
Citation: Huang Juan, Cao Meifang, Ma Yixuan, et al. Wastewater treatment performance and microbial community structure in the constructed wetland under double-pressure of low temperature and Ag NPs exposure[J].Journal of Southeast University(English Edition), 2022, 38(3):291-299.DOI:10.3969/j.issn.1003-7985.2022.03.011.

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