title: Malachite green adsorption onto natural zeolite and reuse by microwave irradiation.
abstract: Natural zeolite was used for the removal of malachite green (MG) from aqueous solution in batch mode and reused by microwave irradiation. The isotherm data were analyzed by the Langmuir, Freundlich, Redlich-Peterson, and Koble-Corrigan isotherm model. The better fit for the equilibrium process was Koble-Corrigan model. The kinetic studies indicated that the adsorption followed the pseudo-second-order kinetic. Thermodynamic calculations showed that the adsorption was spontaneous and endothermic process. Spent zeolite was treated by microwave irradiation and it was found that yield of regeneration was 85.8% in the case of microwave irradiated time 10 min at 160 W.
authors: Department of Chemistry, Zhengzhou University, Kexue Road 100#, Zhengzhou, Henan 450001, PR China. rphan67@zzu.edu.cn
authors: Runping
authors: R
authors: Han
authors: Yu
authors: Y
authors: Wang
authors: Qing
authors: Q
authors: Sun
authors: Lulu
authors: L
authors: Wang
authors: Jiyun
authors: J
authors: Song
authors: Xiaotian
authors: X
authors: He
authors: Chanchan
authors: C
authors: Dou
mesh_terms: D000327:Adsorption; D002621:Chemistry / Q000379:methods; D004396:Coloring Agents / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008872:Microwaves; D012394:Rosaniline Dyes / Q000032:analysis* / Q000737:chemistry; D012996:Solutions; D013696:Temperature; D013816:Thermodynamics; D013997:Time Factors; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D012394:Rosaniline Dyes; D012996:Solutions; C005095:malachite green; D017641:Zeolites