Impacting Microbial Communities and Absorbing Pollutants by Canna Indica and Cyperus Alternifolius in a Full-Scale Constructed Wetland System

Yinghai Wu, Tao He, Chen Chen, Xiaohang Fang, Dongyang Wei, Jing Yang, Renduo Zhang and Rui Han
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Yinghai Wu: College of Marine and Civil Engineering, Dalian Ocean University, Dalian 116023, China
Tao He: South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China
Chen Chen: South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China
Xiaohang Fang: South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China
Dongyang Wei: South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China
Jing Yang: South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China
Renduo Zhang: Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
Rui Han: College of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China

IJERPH, 2019, vol. 16, issue 5, 1-14

Abstract: Wetland plants that cover the wetlands play an important role in reducing pollutants. The aim of this study was to investigate the effect of two plant species on microbial communities and nitrogen-removal genes and to evaluate the contributions of absorbing pollutants by Canna indica (CI) and Cyperus alternifolius (CA) to the removal performance in both a vertical subsurface flow constructed wetland and a horizontal subsurface flow constructed wetland, which were part of a full-scale hybrid constructed wetland system. The microbial assemblages were determined using 16S rRNA high-throughput sequencing. Results showed that the presence of CI and CA positively affected microbial abundance and community in general and which was positive for the total bacteria and ammonia nitrogen removal in the CWs. The higher abundance of Nitrospirae appeared in the non-rhizosphere sediment (NRS) than that in the rhizosphere sediment (RS). More denitrification genes were found in NRS than in RS. The copy numbers of narG , nirS and nosZ genes for CA were higher than those for CI. Wetland plant species can significantly ( P < 0.05) affect the distribution of microbial communities in RS. Plant selection is important to promote the development of microbial communities with a more active and diverse catabolic capability and the contribution of plant absorption to the overall removal rate of wetland system can be neglected.

Keywords: wetland plant; phytoremediation; microbial distribution; functional gene; biological inhibition; high-throughput (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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