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2015•American journal of environmental engineeringOpen access

Removal of Acid Violet 7 Using Chitosan-GLA as the Adsorbent

Megat Ahmad Kamal Megat Hanafiah, Wan Saime Wan Ngah, Nurfarahin M. Safuan, Wan Khaima Azira Wan Mat Khalir, Zurhana Mat Hussin

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Abstract

The removal of Acid Violet 7 (AV 7) by adsorption onto chitosan-glutaraldehyde (chitosan-GLA) beads was investigated under batch adsorption method. Existence of amino (-NH2) and hydroxyl (-OH) groups as the active sites on chitosan-GLA beads was confirmed by Fourier Transform Infra-Red (FTIR) spectrometer. The optimum pH and contact time for good performance of AV 7 adsorption were pH 4 and 120 min, respectively. Adsorption kinetics was best described by the pseudo-second-order kinetic model, and the adsorption isotherm study showed a better fit of equilibrium data by Langmuir isotherm model. The maximum adsorption capacity (qmax) obtained was 172.41 mg/g at 323 K.

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What this paper is about

The removal of Acid Violet 7 (AV 7) by adsorption onto chitosan-glutaraldehyde (chitosan-GLA) beads was investigated under batch adsorption method. Existence of amino (-NH2) and hydroxyl (-OH) groups as the active sites on chitosan-GLA beads was confirmed by Fourier Transform Infra-Red (FTIR) spectrometer. The optimum pH and contact time for good performance of AV 7 adsorption were pH 4 and 120 min, respectively. Adsorption kinetics was best described by the pseudo-second-order kinetic model, and the adsorption isotherm study showed a better fit of equilibrium data by Langmuir isotherm model. The maximum adsorption capacity (qmax) obtained was 172.41 mg/g at 323 K.

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Available abstract

The removal of Acid Violet 7 (AV 7) by adsorption onto chitosan-glutaraldehyde (chitosan-GLA) beads was investigated under batch adsorption method. Existence of amino (-NH2) and hydroxyl (-OH) groups as the active sites on chitosan-GLA beads was confirmed by Fourier Transform Infra-Red (FTIR) spectrometer. The optimum pH and contact time for good performance of AV 7 adsorption were pH 4 and 120 min, respectively. Adsorption kinetics was best described by the pseudo-second-order kinetic model, and the adsorption isotherm study showed a better fit of equilibrium data by Langmuir isotherm model. The maximum adsorption capacity (qmax) obtained was 172.41 mg/g at 323 K.

Key concepts: Adsorption, Chitosan, Glutaraldehyde, Langmuir adsorption model, Fourier transform infrared spectroscopy, Chemistry, Kinetics, Nuclear chemistry

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