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Novel Chitosan-FeS@biochar-added constructed wetland microcosms for NH4+/NO3- and Pb removal: Performance and mechanism by Hai Wang; Renrong Liu; Qian Chen; Haixin Xia; Yaohong Zhang is a Environmental Science article available to read on EtoBox.

What is Novel Chitosan-FeS@biochar-added constructed wetland microcosms for NH4+/NO3- and Pb removal: Performance and mechanism about?

Biochar has been proven to be efficient for enhancing purifying performance, however, studies on nitrogen (N) removal pathways and microbial community structure is far insufficient in modified-biochar-added constructed wetlands (CWs) for treating N and heavy metals co-existing wastewater. Therefore, the composite of Chitosan-FeS @ peanut shell biochar (CFP) was applied in CWs to assess its performance for treating N and Pb co-existing wastewater and investigate N removal pathways. It showed that adding CFP enhanced the nitrification and denitrification intensity and increased removal rates of NO3 -, NH4 + and TN by 76.32%, 28.41% and 52.48% respectively, in CWs. CFP not only functioned as electron donor to drive denitrification but also increased the relative abundance of Thiobacillus, Sulfurimonas and Geobacter, thereby promoting N removal. Furthermore, CFP alleviated Pb stress on Acorus calamus L.Therefore, this study provides a promising and feasible strategy for treating N and Pb co-existing wastewater in CWs.

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Author

Hai Wang; Renrong Liu; Qian Chen; Haixin Xia; Yaohong Zhang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)