DOI: 10.1016/j.watres.2018.11.089
Scopus记录号: 2-s2.0-85059346618
论文题名: Reduction of reagent requirements and sludge generation in Fenton's oxidation of landfill leachate by synergistically incorporating forward osmosis and humic acid recovery
作者: Iskander S.M. ; Novak J.T. ; He Z.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 310
结束页码: 317
语种: 英语
英文关键词: Fenton's oxidation
; Forward osmosis
; Humic acid
; Landfill leachate
; Sludge reduction
Scopus关键词: Alkalinity
; Biological materials
; Chemical oxygen demand
; Iron compounds
; Organic acids
; Osmosis
; Oxidation
; Recovery
; Sodium chloride
; Sodium hydroxide
; Fenton's oxidation
; Forward osmosis
; Humic acid
; Landfill leachates
; Sludge reduction
; Leachate treatment
; chlorine
; humic acid
; oxidizing agent
; potassium
; reagent
; sodium
; sodium chloride
; activated sludge
; alkalinity
; concentration (composition)
; humic acid
; landfill
; leachate
; osmosis
; oxidation
; recovery
; reduction
; waste treatment
; alkalinity
; Article
; chemical oxygen demand
; concentration (parameter)
; concentration process
; controlled study
; Fenton reaction
; forward osmosis
; landfill leachate
; molecular weight
; osmosis
; pH
; priority journal
; sludge
英文摘要: Applications of Fenton's oxidation of landfill leachate is limited by both high reagent requirements and a large amount of sludge generation. To address those issues, forward osmosis (FO) and humic acid (HA) recovery were incorporated with Fenton's treatment. In the FO, leachate was concentrated by 3.2 times in 10 hours using a 5-M NaCl draw solution. The HA recovery increased from 1.86 to 2.45 g L−1 at pH 2 after FO concentration, mainly because of the replacement of O in the HA structure by other inorganics (i.e., Cl, Na, K) with higher molecular weights. Due to the movement of alkalinity causing species (i.e., HCO3 −, CO3 2-) to the draw side driven by a concentration gradient, the H2SO4 requirement per g of recovered HA and per g of removed COD decreased by 46.4% and 17.1%, respectively. The HA recovery also decreased sludge generation by 30%. At a dimensionless oxidant dose of 0.5, the proposed system reduced the overall requirement of H2SO4 by 25.2%, NaOH by 34.6%, and both FeSO4.7H2O and H2O2 by 35%, compared to the standalone Fenton's treatment of raw leachate. Those results have demonstrated that the proposed system could greatly decrease the leachate volume, lower the reagent requirements, and reduce the sludge production towards sustainable leachate treatment. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122048
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
Recommended Citation:
Iskander S.M.,Novak J.T.,He Z.. Reduction of reagent requirements and sludge generation in Fenton's oxidation of landfill leachate by synergistically incorporating forward osmosis and humic acid recovery[J]. Water Research,2019-01-01