Yeon, Kyeong-Ho Park, Heesu Lee, Seung-Hak Park, Yong-Min Lee, Sang-Hyup Iwamoto, Masakazu 2024-01-20T22:35:10Z 2024-01-20T22:35:10Z 2022-01-11 2008-09 0256-1115 https://pubs.kist.re.kr/handle/201004/133159 Eutrophication caused by the excessive Supply of phosphate to water bodies has been considered as one of the most important environmental problems. In this study, the powder of zirconium mesostructure (ZM), which was prepared with the template of surfactant, was immobilized in calcium alginate for practical application and the resulting material was tested to evaluate the phosphate removal efficiency. Sorption isotherms and kinetic parameters were obtained by using the entrapped ZM beads with 30 to 60% of ZM. The maximum sorption capacity increased with the higher ZM content. Q(max) in Langmuir isotherm was 51.74 mg/g for 60% of ZM with 7 mm of size. The smaller the particle size of the ZM beads, the faster the rate of phosphate removal, because the phosphate ions had less distance to reach the internal pores of the immobilized ZM beads. Chemical and electrochemical regeneration techniques were compared. Phosphates adsorbed on the ZM beads were effectively desorbed with NaCl, NaOH, and Na2SO4 solutions. An electrochemical regeneration system consisting of an anion exchange membrane between two platinum-coated titanium electrodes was successfully used to desorb and regenerate the phosphate-saturated ZM beads. Complete regeneration was reached under optimal experimental conditions. Chemical and electrochemical regeneration proved the reusability of the bead form of the entrapped ZM, and will enhance the economical performance of the phosphate treatment process. English KOREAN INSTITUTE CHEMICAL ENGINEERS SURFACTANT MICELLE MESOSTRUCTURE WASTE-WATER PHOSPHORUS REMOVAL ANION-EXCHANGE OXIDE ADSORBENT RECOVERY ION ADSORPTION COMPLEX Zirconium mesostructures immobilized in calcium alginate for phosphate removal Article 10.1007/s11814-008-0170-7 1 KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.25, no.5, pp.1040 - 1046 KOREAN JOURNAL OF CHEMICAL ENGINEERING 25 5 1040 1046 scie scopus kci ART001283265 000259905100017 2-s2.0-58149524811 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article SURFACTANT MICELLE MESOSTRUCTURE WASTE-WATER PHOSPHORUS REMOVAL ANION-EXCHANGE OXIDE ADSORBENT RECOVERY ION ADSORPTION COMPLEX Zirconium Mesostructure Phosphate Adsorption Regeneration