Preparation of Metal Immobilized Orange Waste Gel for Arsenic(V) Removal From Water

Preparation of Metal Immobilized Orange Waste Gel for Arsenic(V) Removal From Water

Abstract - The toxicity of arsenic is known to be a risk to aquatic flora and fauna and to human health even in relatively low concentration. In this research an adsorption gel was prepared from agricultural waste material (orange waste) through simple chemical modification in the view to remove arsenic (V) from water. Orange waste was crushed into small particles and saponified with Ca(OH)2 to prepare saponified orange waste, which was further modified by immobilizing gadolinium(III) to obtain desired adsorption material (Gd(III)-immobilized SOW gel). The effective pH range for arsenic adsorption was found to be 7.5 – 8.5. Adsorption capacity of the gel was evaluated to be 0.45 mol-arsenic (V)/kg. Dynamic adsorption of arsenic (V) in column-mode was conducted and a dynamic capacity was found to be 0.39 mol/kg. Elution of arsenate was tested after complete saturation of the column packed with gadolinium-immobilized orange waste adsorption gel. A complete elution of arsenate was achieved with the help of 1 M HCl and 28 times pre-concentration factor was attained. This study showed that a cheap and abundant agro-industrial waste material could be successfully employed for the remediation of arsenic pollution in aquatic environment.Keywords: Arsenic; Orange waste; Gadolinium(III); Adsorption; Elution.

Kumar Biswas, Biplob

Inoue, Katsutoshi

Ohto, Keisuke

Harada, Hiroyuki

Kawakita, Hidetaka

Aceh International Journal of Science and Technology; Vol 3, No 2: May - August 2014

2088-9860

Graduate School of Syiah Kuala University

2014-05-02

http://jurnal.unsyiah.ac.id/AIJST/article/view/1388/1335

application/pdf

eng

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

Peer-reviewed Article

http://jurnal.unsyiah.ac.id/AIJST/article/view/1388

10.13170/aijst.3.2.1388