Biochar-amended constructed wetlands for eutrophication control and microcystin (MC-LR) removal | |
Rui Cheng; Shengnan Hou; Jingfu Wang; Hui Zhu; Brian Shutes; Baixing Yan | |
2022 | |
发表期刊 | Chemosphere |
卷号 | 295页码:133830 |
摘要 | Microcystins (MCs) pollution caused by eutrophication and climate change has posed a serious threat to ecosystems and human health. Constructed wetlands (CWs) with biochar addition volume ratios of 0% (BC0-CWs), 10% (BC10-CWs), 20% (BC20-CWs) and 50% (BC50-CWs) were set up to evaluate the efficiency of biochar-amended CWs for eutrophication and MCs pollution control. The results illustrated that removal efficiencies of both NH4+-N and NO3−-N were enhanced by biochar addition to varying degrees. The average TP and MC-LR removal efficiencies increased with increasing biochar addition ratios, and the average TP and MC-LR removal efficiencies in biochar-amended CWs were significantly (p < 0.05) improved by 5.64–9.58% and 10.74–14.52%, respectively, compared to that of BC0-CWs. Biochar addition changed the microbial community diversity and structure of CWs. The relative abundance of functional microorganisms such as Burkholderiaceae, Nitrospiraceae, Micrococcaceae, Sphingomonadaceae and Xanthomonadaceae was promoted by biochar addition regardless of addition ratios. The higher relative abundance of the above microorganisms in BC20-CWs and BC50-CWs may contribute to their better removal performance compared to other CWs. The concentrations of extracellular polymeric substance (EPS) in biochar-amended CWs were significantly (p < 0.05) lower than that in BC0-CWs, which can reduce the risk of system clogging. This study demonstrated that biochar addition may be a potential intensification strategy for eutrophication and MCs pollution control by CWs. Considering both the removal performance and economic cost, a biochar addition ratio of 20% was recommended as an optimal addition ratio in practical application. |
关键词 | Eutrophication microcystin-lr constructed Wetlands biochar microbial Community |
DOI | 10.1016/j.chemosphere.2022.133830 |
URL | 查看原文 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.gyig.ac.cn/handle/42920512-1/13593 |
专题 | 环境地球化学国家重点实验室 |
作者单位 | 1.Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, PR China 2.Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun, 130102, PR China 3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, PR China 4.Department of Natural Sciences, Middlesex University, Hendon, London, NW4 4BT, UK |
推荐引用方式 GB/T 7714 | Rui Cheng,Shengnan Hou,Jingfu Wang,et al. Biochar-amended constructed wetlands for eutrophication control and microcystin (MC-LR) removal[J]. Chemosphere,2022,295:133830. |
APA | Rui Cheng,Shengnan Hou,Jingfu Wang,Hui Zhu,Brian Shutes,&Baixing Yan.(2022).Biochar-amended constructed wetlands for eutrophication control and microcystin (MC-LR) removal.Chemosphere,295,133830. |
MLA | Rui Cheng,et al."Biochar-amended constructed wetlands for eutrophication control and microcystin (MC-LR) removal".Chemosphere 295(2022):133830. |
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