title: Adsorption of phosphate from aqueous solutions and sewage using zirconium loaded okara (ZLO): Fixed-bed column study.
abstract: This study explores the potential of removing phosphorus from aqueous solutions and sewage by Zr(IV)-loaded okara (ZLO) in the fixed-bed column. Soybean residue (okara) was impregnated with 0.25M Zr(IV) solution to prepare active binding sites for phosphate. The effect of several factors, including flow rate, bed height, initial phosphorus concentration, pH and adsorbent particle size on the performance of ZLO was examined. The maximum dynamic adsorption capacity of ZLO for phosphorus was estimated to be 16.43mg/g. Breakthrough curve modeling indicated that Adams-Bohart model and Thomas model fitted the experimental data better than Yoon-Nelson model. After treatment with ZLO packed bed column, the effluent could meet the discharge standard for phosphorus in Australia. Successful desorption and regeneration were achieved with 0.2 NaOH and 0.1 HCl, respectively. The results prove that ZLO can be used as a promising phosphorus adsorbent in the dynamic adsorption system.
authors.affiliation: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), 15 Broadway, Ultimo, NSW 2007, Australia.
authors.forename: T A H
authors.initials: TA
authors.lastname: Nguyen
authors.affiliation: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), 15 Broadway, Ultimo, NSW 2007, Australia. Electronic address: ngohuuhao121@gmail.com.
authors.forename: H H
authors.initials: HH
authors.lastname: Ngo
authors.affiliation: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), 15 Broadway, Ultimo, NSW 2007, Australia.
authors.forename: W S
authors.initials: WS
authors.lastname: Guo
authors.affiliation: Faculty of Geography, University of Science, Vietnam National University, Hanoi, Viet Nam.
authors.forename: T Q
authors.initials: TQ
authors.lastname: Pham
authors.affiliation: College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
authors.forename: F M
authors.initials: FM
authors.lastname: Li
authors.affiliation: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), 15 Broadway, Ultimo, NSW 2007, Australia.
authors.forename: T V
authors.initials: TV
authors.lastname: Nguyen
authors.affiliation: Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology-Vietnam National University, Ho Chi Minh City, Viet Nam.
authors.forename: X T
authors.initials: XT
authors.lastname: Bui
mesh_terms: D000327:Adsorption; D001315:Australia; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010710:Phosphates / Q000032:analysis / Q000737:chemistry*; D010758:Phosphorus / Q000032:analysis / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D010710:Phosphates; D012722:Sewage; D014874:Water Pollutants, Chemical; D010758:Phosphorus; D015040:Zirconium
keywords: Agricultural by-products; Fixed-bed column; Food waste recycling; Phosphorus adsorption; Soybean by-product (okara); Zr(IV)-loaded okara