APPLICATION OF IMMOBILIZED SILICA NANOPOWDER WITHIN ALGINATE FOR CADMIUM ADSORPTION FROM AQUEOUS SOLUTIONS

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DARVISHI CHESHMEH SOLTANI REZA; GODINI HATAM; GHANADZADEH MOHAMAD JAVAD; RAJAIE MOHAMAD SADEGH; SAFARI MEHDI

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Journal: WATER AND WASTEWATER Year:2015 | Volume:26 | Issue:3 (97) Page(s): 2-10

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Title

APPLICATION OF IMMOBILIZED SILICA NANOPOWDER WITHIN ALGINATE FOR CADMIUM ADSORPTION FROM AQUEOUS SOLUTIONS

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Keywords

ADSORPTIONQ2

ALGINATEQ3

NANOPOWDERQ2

CADMIUMQ2

IMMOBILIZATIONQ2

Abstract

The main objective of the present study was to investigate Cd(II) ADSORPTION by immobilized silica NANOPOWDER within calcium ALGINATE and to determine the isotherm, kinetics, and thermodynamics of the ADSORPTION process. Batch flow mode reactors were used to investigate the effects of initial pH, contact time and metal ion concentration on Cd (II) ADSORPTION. The optimal contact time and initial pH for Cd (II) ADSORPTION were found to be 120 min and 4.0, respectively. Increasing Cd (II) ion concentration from 10 to 1000 mg/L led to increasing adsorbed Cd (II) ions from 5.71 to 100.65 mg/g. The results showed that the Langmuir isotherm model was the best model to describe the experimental data (R2=0.997). The maximum ADSORPTION capacity (qm) for Cd(II) ADSORPTION onto the adsorbent was estimated to be 72.99 mg/g. Based on the mean free energy of ADSORPTION (E) obtained from Dubinin-Radushkevich (D–R) isotherm model, Cd(II) ADSORPTION onto immobilized silica NANOPOWDER follows a chemical mechanism (E=8.451 kJ/mol). The kinetic study indicated that the pseudo-second order model was a more suitable model than the pseudo-first order one for describing Cd (II) ADSORPTION (R2=0.999). Additionally, the negative DHo and DGo values demonstrated an exothermic and spontaneous Cd (II) ADSORPTION onto immobilized silica NANOPOWDER.

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APA: Copy

DARVISHI CHESHMEH SOLTANI, REZA, GODINI, HATAM, GHANADZADEH, MOHAMAD JAVAD, RAJAIE, MOHAMAD SADEGH, & SAFARI, MEHDI. (2015). APPLICATION OF IMMOBILIZED SILICA NANOPOWDER WITHIN ALGINATE FOR CADMIUM ADSORPTION FROM AQUEOUS SOLUTIONS. WATER AND WASTEWATER, 26(3 (97)), 2-10. SID. https://sid.ir/paper/103837/en

Vancouver: Copy

DARVISHI CHESHMEH SOLTANI REZA, GODINI HATAM, GHANADZADEH MOHAMAD JAVAD, RAJAIE MOHAMAD SADEGH, SAFARI MEHDI. APPLICATION OF IMMOBILIZED SILICA NANOPOWDER WITHIN ALGINATE FOR CADMIUM ADSORPTION FROM AQUEOUS SOLUTIONS. WATER AND WASTEWATER[Internet]. 2015;26(3 (97)):2-10. Available from: https://sid.ir/paper/103837/en

IEEE: Copy

REZA DARVISHI CHESHMEH SOLTANI, HATAM GODINI, MOHAMAD JAVAD GHANADZADEH, MOHAMAD SADEGH RAJAIE, and MEHDI SAFARI, “APPLICATION OF IMMOBILIZED SILICA NANOPOWDER WITHIN ALGINATE FOR CADMIUM ADSORPTION FROM AQUEOUS SOLUTIONS,” WATER AND WASTEWATER, vol. 26, no. 3 (97), pp. 2–10, 2015, [Online]. Available: https://sid.ir/paper/103837/en

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