Choi, Jae-Woo Lee, Seung-Yeon Lee, Sang-Hyup Kim, Ji-Eun Park, Ki-Young Kim, Dong-Ju Hong, Seok-Won 2024-01-20T14:31:58Z 2024-01-20T14:31:58Z 2021-09-05 2012-07 0049-6979 https://pubs.kist.re.kr/handle/201004/129109 Three novel composite adsorbents, sulfate-coated zeolite (SCZ), hydrotalcite (SCH), and activated alumina (SCAA), were characterized and employed for the removal of phosphate from aqueous solution using equilibrium and kinetic batch experiments. Scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction spectrum were used to study the surface characteristics of the coated layer. Equilibrium tests showed that the adsorption of phosphate followed both Langmuir and Freundlich isotherms. The powder-type SCZ was better for phosphate removal (maximum binding energy, beta = 111.49 mg g(-1)) compared to hydrotalcite and activated alumina. The adsorption of phosphate was considered to take place mainly by ion exchange. The kinetic data followed a pseudo-second-order kinetic model. The initial adsorption of phosphate onto the sulfate-coated adsorbents was fast, indicating that the sulfate-coated materials developed in this study can be used as promising adsorbents for the removal of phosphate from wastewater or sewage. English Kluwer Academic Publishers Comparison of Surface-Modified Adsorbents for Phosphate Removal in Water Article 10.1007/s11270-011-1072-6 1 Water, Air, & Soil Pollution, v.223, no.6, pp.2881 - 2890 Water, Air, & Soil Pollution 223 6 2881 2890 N scie scopus 000304926200002 2-s2.0-84862817356 Environmental Sciences Meteorology & Atmospheric Sciences Water Resources Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Water Resources Article AQUEOUS-SOLUTION PHOSPHORUS REMOVAL WASTE-WATER HYDROTALCITE ADSORPTION ZEOLITE CHROMIUM(VI) SORBENTS KINETICS SORPTION Sulfate coated Zeolite Hydrotalcite Activated alumina Phosphate