DOI: 10.1016/j.watres.2018.04.007
Scopus记录号: 2-s2.0-85045402567
论文题名: Highly efficient removal of nitrogen and phosphorus in an electrolysis-integrated horizontal subsurface-flow constructed wetland amended with biochar
作者: Gao Y. ; Zhang W. ; Gao B. ; Jia W. ; Miao A. ; Xiao L. ; Yang L.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 139 起始页码: 301
结束页码: 310
语种: 英语
英文关键词: Biochar
; Electrolysis
; Iron electrode
; Nitrate removal
; Phosphorus removal
Scopus关键词: Anodes
; Bacteria
; Cathodes
; Denitrification
; Effluents
; Electrolysis
; Iron compounds
; Metal ions
; Nitrates
; Nitrogen
; Nitrogen removal
; Phosphorus
; Water quality
; Autotrophic denitrification
; Bio chars
; Electrochemical denitrification
; Horizontal subsurface flow constructed wetlands
; Iron electrodes
; Nitrate removal
; Nitrogen and phosphorus
; Phosphorus removal
; Wetlands
; activated carbon
; biochar
; ferric ion
; iron
; nitrate
; nitrogen
; phosphorus
; unclassified drug
; water
; biochar
; charcoal
; hydrogen
; nitric acid derivative
; nitrogen
; phosphorus
; adsorption
; bacterium
; biochar
; biofilm
; constructed wetland
; denitrification
; electrode
; electrokinesis
; iron
; nitrate
; nitrogen
; phosphorus
; pollutant removal
; substrate
; subsurface flow
; wastewater
; wastewater treatment
; water quality
; adsorption
; Article
; constructed wetland
; current density
; denitrifying bacterium
; electrochemical analysis
; electrolysis
; microbial community
; nonhuman
; priority journal
; sedimentation
; waste component removal
; waste water management
; water quality
; chemistry
; denitrification
; electrode
; pilot study
; procedures
; sewage
; waste water
; water pollutant
; wetland
; Bacteria (microorganisms)
; Charcoal
; Denitrification
; Electrodes
; Electrolysis
; Hydrogen
; Iron
; Nitrates
; Nitrogen
; Phosphorus
; Pilot Projects
; Waste Disposal, Fluid
; Waste Water
; Water Pollutants, Chemical
; Water Quality
; Wetlands
英文摘要: Electrolysis combined with biochar (BC) was used in a constructed wetland to intensify nitrogen (N) and phosphorus (P) removal from wastewater simultaneously. A pilot study was conducted using an electrolysis-integrated, BC-amended, horizontal, subsurface-flow, constructed wetland (E-BHFCW). The research results showed that both electrolysis and BC substrate played important roles in the intensified, constructed wetland. The electrolysis combined BC substrate greatly enhanced the removal rates of nitrate (49.54%) and P (74.25%) when the E-BHFCW operated under the lower current density of 0.02 mA/cm2 and an electrolysis time of 24 h. Improved N removal was accomplished with the electrochemical denitrification of iron cathodes; the autotrophic denitrification bacteria appeared to remove nitrate which was adsorbed on the BC substrate because hydrogen gas was produced by cathodes in the E-BHFCW. Less nitrate was taken directly by wetland plants and microbes. The in-situ formation of ferric ions from a sacrificial iron anode, causing P chemical sedimentation and physical adsorption, improved P removal. BC, modified by iron ions from an iron anode to adsorb the nitrate and P, was a good material to improve effluent water quality. It can also serve as a favorable microbial carrier to bio-transform nitrate to N gas. This is because there were abundant and diverse bacterial communities in the biofilm on the BC substrate in the E-BHFCW. Thus, electrolysis integrated with BC in a constructed wetland is a novel, feasible and effective technique for enhancing wastewater N and P removal. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112768
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210046, China; Department of Agricultural & Biological Engineering, University of Florida, Gainesville, FL 32611, United States
Recommended Citation:
Gao Y.,Zhang W.,Gao B.,et al. Highly efficient removal of nitrogen and phosphorus in an electrolysis-integrated horizontal subsurface-flow constructed wetland amended with biochar[J]. Water Research,2018-01-01,139