Adsorption kinetic model of alginate gel beads synthesized micro particle-prussian blue to remove cesium ions from water. (April 2016)

• Record Type: Journal Article
• Authors: Mihara, Yoshihiro; Sikder, Md. Tajuddin; Yamagishi, Hideaki; Sasaki, Takahiro; Kurasaki, Masaaki; Itoh, Shinji; Tanaka, Shunitz
• Is Part Of: Journal of water process engineering. Volume 10(2016)
• Page Start: 9
• Page End: 19
• Publication Date: 2016-04
• Subjects: Alginate gel beads -- Prussian blue -- Cesium ion -- Adsorption -- Kinetics; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2016.01.001
• Languages: English
• ISSNs: 2214-7144

Abstract

Abstract: Prussian blue (PB) impregnated in alginate gel (AG) beads were synthesized in order to test their viability for removing cesium (Cs) ions from wastewater. The impregnation yields PB-AG(syn.) beads containing very fine crystals of PB incorporated into the AG beads. The interaction between PB-AG(syn.) beads and Cs ions was investigated by adsorption experiments and analyzed using Langmuir and adsorption-kinetic models. The adsorption of Cs ions onto PB-AG(syn.) beads reached equilibrium after 12 h. The maximum adsorption capacities of the PB-AG(syn.) beads were 0.557 mg bead −1 and the kinetic rate was found to be k 1 = 1.72 × 10 −1 min −1 at pH 6.0 for the pseudo first order, and 4.65 × 10 −1 bead −1 mg −1 min −1 at pH 6.0 for the pseudo second order. The effects of pH, organic acids and salts such as potassium and sodium ions onto the adsorption of Cs ions by PB-AG(syn.) beads were found insignificant and low. Consequently, the PB-AG(syn.) beads showed a high capacity for the removal of Cs ions from water.