title: A comparative study on different metal loaded soybean milk by-product 'okara' for biosorption of phosphorus from aqueous solution.
abstract: Cationization of agricultural by-products using metal salts is widely used to activate their phosphorous capture ability. This study developed three kinds of new metal loaded soybean milk by-product 'okara' for phosphorus biosorption. A comparative study among these biosorbents was carried out with respect to their performances in terms of affinity, stability and reusability. Zirconium loaded okara (ZLO) was found to have the highest affinity towards PO(4)(3-) anions (47.88 mg/g), followed by iron/zirconium loaded okara--IZLO (40.96 mg/g) and iron loaded okara--ILO (16.39 mg/g). ZLO was successfully desorbed with 0.2M NaOH and activated with 0.1 HCl prior to the next cycle. After five consecutive cycles, the efficiency of both adsorption and desorption of ZLO remained about 85% whilst no Zr(IV) leakage was observed. Conversely, IZLO and ILO suffered from vital short comings such as high metal release and/or sharp reduction in PO4(3-) sequestering capability after multi operation cycles.
authors: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia.
authors: T A H
authors: TAH
authors: Nguyen
authors: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia. Electronic address: ngohuuhao121@gmail.com.
authors: H H
authors: HH
authors: Ngo
authors: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia.
authors: W S
authors: WS
authors: Guo
authors: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia.
authors: T V
authors: TV
authors: Nguyen
authors: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors: J
authors: J
authors: Zhang
authors: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors: S
authors: S
authors: Liang
authors: Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC.
authors: S S
authors: SS
authors: Chen
authors: Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC.
authors: N C
authors: NC
authors: Nguyen
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D007501:Iron / Q000737:chemistry; D007700:Kinetics; D008670:Metals / Q000737:chemistry*; D010758:Phosphorus / Q000302:isolation & purification*; D010940:Plant Proteins / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry*; D012996:Solutions; D045730:Soy Foods; D041942:Soy Milk / Q000737:chemistry*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D015040:Zirconium / Q000737:chemistry
chemical_list: D008670:Metals; D010940:Plant Proteins; D011134:Polysaccharides; D012996:Solutions; D014874:Water Pollutants, Chemical; C412882:okara, Glycine max; D010758:Phosphorus; D015040:Zirconium; D007501:Iron
keywords: Biosorption; Desorption; Metal loaded okara; Phosphorus removal; Reusability