Detail Inovasi Perguruan Tinggi


Tema: Rekayasa Instrumentasi dan Energi
Judul: Reduction of seawater salinity by natural zeolite (Clinoptilolite): Adsorption isotherms, thermodynamics and kinetics
Perguruan Tinggi: Universitas Telkom
Jenis/sdm: dosen/0430058602#0416017601

Tahun: 2017

We have investigated the adsorption isotherms, thermodynamics and adsorption kinetics of salt onto zeolites. The adsorption isotherm was studied using Langmuir, Freundlich, Temkin and Dubinin Radushkevich models. The separation factor, RL=0.588, indicates the nature of adsorption process is favorable. The adsorption is physical as indicated by high adsorption intensity (n N 1) and small mean free energy (E b 20 kJ/mol). The negative ??G?? (???13.33 to ???13.44 kJ/mol) indicates the spontaneous nature of adsorption. The negative ??H?? (???16.71 kJ/mol) confirms the exothermic nature of adsorption process,whereas the negative ??S?? (???0.0116 kJ/-mol K) suggests the configuration of the adsorbate on the zeolite surface is less random. Pseudo-second-order kinetic model well fits to the experiment data. Based on the characteristics of the adsorption isotherms, thermodynamic and adsorption kinetics, zeolite is potential for seawater desalination process.