title: Equilibrium, kinetic and thermodynamic study of cesium adsorption onto nanocrystalline mordenite from high-salt solution.
abstract: In this study, the equilibrium, kinetics and thermodynamics of cesium adsorption by nanocrystalline mordenite were investigated under cesium contamination with high-salt solution, simulating the case of an operation and decommissioning of nuclear facilities or an accident during the processes. The adsorption rate constants were determined using a pseudo second-order kinetic model. The kinetic results strongly demonstrated that the cesium adsorption rate of nano mordenite is extremely fast, even in a high-salt solution, and much faster than that of micro mordenite. In the equilibrium study, the Langmuir isotherm model fit the cesium adsorption data of nano mordenite better than the Freundlich model, which suggests that cesium adsorption onto nano mordenite is a monolayer homogeneous adsorption process. The obtained thermodynamic parameters indicated that the adsorption involved a very stable chemical reaction. In particular, the combination of rapid particle dispersion and rapid cesium adsorption of the nano mordenite in the solution resulted in a rapid and effective process for cesium removal without stirring, which may offer great advantages for low energy consumption and simple operation.
authors.affiliation: Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea. Electronic address: lky@kaeri.re.kr.
authors.forename: Keun-Young
authors.initials: KY
authors.lastname: Lee
authors.affiliation: Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea.
authors.forename: Minsung
authors.initials: M
authors.lastname: Park
authors.affiliation: Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea.
authors.forename: Jimin
authors.initials: J
authors.lastname: Kim
authors.affiliation: Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea.
authors.forename: Maengkyo
authors.initials: M
authors.lastname: Oh
authors.affiliation: Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea.
authors.forename: Eil-Hee
authors.initials: EH
authors.lastname: Lee
authors.affiliation: Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea.
authors.forename: Kwang-Wook
authors.initials: KW
authors.lastname: Kim
authors.affiliation: Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea.
authors.forename: Dong-Yong
authors.initials: DY
authors.lastname: Chung
authors.affiliation: Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea.
authors.forename: Jei-Kwon
authors.initials: JK
authors.lastname: Moon
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D002586:Cesium / Q000737:chemistry*; D007700:Kinetics; D012965:Sodium Chloride / Q000032:analysis; D012996:Solutions; D013816:Thermodynamics
chemical_list: D000538:Aluminum Silicates; D012996:Solutions; C048397:mordenite; D002586:Cesium; D012965:Sodium Chloride
keywords: Adsorption; Cesium; Kinetics; Mordenite; Nanoadsorbent