TERMODYNAMIC OF Fe(III) ADSORPTION BY MERCAPTO-SILICA HYBRID IN A Fe/Mn SYSTEM

Mujiyanti, Dwi Rasy and Irawati, Utami Irawati TERMODYNAMIC OF Fe(III) ADSORPTION BY MERCAPTO-SILICA HYBRID IN A Fe/Mn SYSTEM. TERMODYNAMIC OF Fe(III) ADSORPTION BY MERCAPTO-SILICA HYBRID IN A Fe/Mn SYSTEM.

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Abstract

The purpose of this study is to investigate the optimum contact time and adsorption capacity of adsorbent through the batch technique in multimetal solution of Fe/Mn. The amount of metal ions being adsorbed was calculated by using Atomic Absorption Spectrophotometer (AAS) based on the difference between the concentration of metal ions before and after adsorption. In the Fe/Mn system optimum adsorption for SG and HMS occurred at 60 and 30 minutes of contact time, respectively. Adsorption of Fe/Mn by SG adsorbent is in compliance with Freundlich isotherm pattern where the value of KF is 141.49 L/µmole for the Fe(III) and 0.20 L/µmole for Mn(II). Adsorption of Fe/Mn solution by using HMS adsorbent was in compliance with Freundlich isotherm model for Fe(III), while the adsorption of Mn(II) in the same solution complied with the Langmuir isotherm model. Fe(III) ion has a KF value of 0.34 L/µmole. If it was calculated using the Langmuir model, the adsorption capacity and adsorption energy for Fe(III) adsorption on HMS were 279.25 mg/g and 11.47 kJ/mole, respectively. Whereas for Mn(II), the adsorption capacity was 8.32 mg/g and the adsorption energy was 17.97 kJ/mole. Keywords: Adsorption, multimetal, silica gel, mercapto-silica hybrid

Item Type: Article
Subjects: Q Science > QD Chemistry
Depositing User: Mr Arief Mirathan - Eka Setya Wijaya
Date Deposited: 25 Aug 2016 10:05
Last Modified: 16 Mar 2017 04:35
URI: http://eprints.unlam.ac.id/id/eprint/1154

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