Choi, Jae-Woo Chung, Seung-Gun Hong, Seok-Won Kim, Dong-Ju Lee, Sang-Hyup 2024-01-20T15:01:24Z 2024-01-20T15:01:24Z 2021-09-05 2012-05 0049-6979 https://pubs.kist.re.kr/handle/201004/129301 An effective adsorbent for the removal of heavy metals was manufactured by immobilization of jujube powder. The adsorptions of Cd, Zn and Cu from aqueous solutions by jujube complex beads (Type 1 and Type 2) were studied in a batch adsorption system. The adsorption data were fitted well with the Langmuir isotherm models. The adsorption capacities (beta) for Cd, Zn and Cu were 4.23, 2.93 and 3.64 mg/g in Type 1 and 1.24, 0.70 and 1.35 mg/g in Type 2 beads. The removal efficiencies of the Type 2 beads, with a larger unit surface area, were lower than those of the Type 1 due to part of the casein or cyclic AMP being destroyed during the drying process of the Type 1. These values for Type 1 beads were higher than those of all other adsorbents for each heavy metal. A comparison of the kinetic models on the overall adsorption rate showed that the adsorption system was best described by pseudo-first-order kinetics. The removal efficiencies of Cd, Zn and Cu exhibited similar tendencies to those observed in the equilibrium tests. This indicates that the jujube complex beads developed in this study can be used as promising adsorbents for the removal of heavy metals from wastewater. English Kluwer Academic Publishers Development of an Environmentally Friendly Adsorbent for the Removal of Toxic Heavy Metals from Aqueous Solution Article 10.1007/s11270-011-0988-1 1 Water, Air, & Soil Pollution, v.223, no.4, pp.1837 - 1846 Water, Air, & Soil Pollution 223 4 1837 1846 N scie scopus 000303385800033 2-s2.0-84862163062 Environmental Sciences Meteorology & Atmospheric Sciences Water Resources Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Water Resources Article ADSORPTION ZN(II) NI(II) CU(II) ALGINATE CADMIUM CD(II) CHITOSAN ZEOLITE MODEL Jujube Heavy metal Adsorption Environmentally friendly Adsorbent