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Reduction of seawater salinity by natural zeolite (Clinoptilolite): Adsorption isotherms, thermodynamics and kinetics
Wibowo E.a, Rokhmat M.a, Sutisnaa, Khairurrijala, Abdullah M.a
a Department of Physics, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Bandung, 40132, Indonesia
b Department of Engineering Physics, School of Electrical Engineering, Telkom University, Bandung, 40257, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2017We 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 > 1) and small mean free energy (E < 20 kJ/mol). The negative ΔG° (− 13.33 to − 13.44 kJ/mol) indicates the spontaneous nature of adsorption. The negative ΔH° (− 16.71 kJ/mol) confirms the exothermic nature of adsorption process, whereas the negative ΔS° (− 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.[/vc_column_text][vc_empty_space][vc_separator css=".vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}"][vc_empty_space][megatron_heading title="Author keywords" size="size-sm" text_align="text-left"][vc_column_text]Adsorption kinetics,Dubinin-Radushkevich,Natural zeolites,Pseudo-second-order kinetic models,Salinity,Seawater desalination,Separation factors,Thermodynamics and kinetics[/vc_column_text][vc_empty_space][vc_separator css=".vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}"][vc_empty_space][megatron_heading title="Indexed keywords" size="size-sm" text_align="text-left"][vc_column_text]Isotherm,Kinetics,Natural zeolite,Salinity,Thermodynamics[/vc_column_text][vc_empty_space][vc_separator css=".vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}"][vc_empty_space][megatron_heading title="Funding details" size="size-sm" text_align="text-left"][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=".vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}"][vc_empty_space][megatron_heading title="DOI" size="size-sm" text_align="text-left"][vc_column_text]https://doi.org/10.1016/j.desal.2017.01.026[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]