DOI: 10.1016/j.watres.2018.05.061
Scopus记录号: 2-s2.0-85049484942
论文题名: Enhanced triclosan and nutrient removal performance in vertical up-flow constructed wetlands with manganese oxides
作者: Xie H. ; Yang Y. ; Liu J. ; Kang Y. ; Zhang J. ; Hu Z. ; Liang S.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 457
结束页码: 466
语种: 英语
英文关键词: Constructed wetlands
; Manganese cycling
; Manganese oxides
; Triclosan
Scopus关键词: Bacteria
; Denitrification
; Dissolved oxygen
; Effluents
; Manganese oxide
; Nutrients
; Oxides
; Pollution
; Potable water
; RNA
; Wetlands
; Adsorptive capability
; Constructed wetlands
; Constructed wetlands (CWs)
; Denitrifying bacteria
; Emerging organic contaminants
; High-throughput sequencing
; Microbial community composition
; Triclosan
; Manganese removal (water treatment)
; bacterial RNA
; dissolved oxygen
; manganese oxide
; RNA 16S
; triclosan
; bacterium
; chemical compound
; community composition
; concentration (composition)
; constructed wetland
; dissolved oxygen
; drinking water
; manganese oxide
; microbial community
; nutrient
; nutrient cycling
; organic pollutant
; oxidant
; performance assessment
; pollutant removal
; amoa gene
; Article
; bacterial gene
; constructed wetland
; effluent
; Gammaproteobacteria
; high throughput sequencing
; microbial community
; narg gene
; nonhuman
; nosz gene
; nutrient
; priority journal
; sand
; water treatment
; Bacteria (microorganisms)
; Gammaproteobacteria
英文摘要: Limited concentrations of oxygen in constructed wetlands (CWs) have inhibited their ability to remove emerging organic contaminants (EOCs) at μg/L or ng/L levels. Manganese (Mn) oxides were proposed as a solution, as they are powerful oxidants with strong adsorptive capabilities. In the present study, triclosan (TCS) was selected as a typical EOC, and CW microcosms with Mn oxides (birnessite) coated sand (B-CWs) and without (C-CWs) were developed to test the removal capacities of TCS and common nutrients. We found that the addition of Mn oxides coated sand significantly improved removal efficiencies of TCS, NH4-N, COD, NO3-N and TP (P < 0.05). The average concentration of Mn(II) effluent was 0.036 mg L−1, mostly lower than the drinking water limit. To gain insight into the mechanisms of pollution removal, Mn transformation, dissolved oxygen (DO) distribution, bacterial abundance, and microbial community composition were also investigated. Maximum Mn(II) was detected at 20 cm height of the B-CWs in anoxic zone. Although Mn-oxidizing bacteria existed in the layer of 30–50 cm with 103–104 CFU g−1 dry substate, Mn oxides were only detected at height from 40 to 50 cm with rich oxygen in B-CW. The quantities of bacterial 16S rRNA, amoA, narG and nosZ were not significantly different between two systems (P > 0.05), while Illumina high-throughput sequencing analysis revealed that the abundance of denitrifying bacteria was significant higher in B-CWs, and the abundance of Gammaproteobacteria that have a recognized role in Mn transformation were significantly increased. The results indicated that Mn oxides could enhance TCS and common pollutants removal in both anoxic and aerobic areas through the recycling of Mn between Mn(II) and biogenic Mn oxides. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112552
Appears in Collections: 气候减缓与适应
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作者单位: Environment Research Institute, Shandong University, Jinan, 250100, China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan, 250100, China
Recommended Citation:
Xie H.,Yang Y.,Liu J.,et al. Enhanced triclosan and nutrient removal performance in vertical up-flow constructed wetlands with manganese oxides[J]. Water Research,2018-01-01,143