Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14685
Title: Development of a treated laterite for arsenic adsorption: Effects of treatment parameters
Authors: Maiti, Abhijit
Basu J.K.
De S.
Published in: Industrial and Engineering Chemistry Research
Abstract: A porous and efficient arsenic adsorbent (specific surface area, 181 ± 4 m 2/g; pore volume, 0.35 ± 0.01 mL/g) is prepared from raw laterite by acid followed by alkali treatment. FTIR, XRD, SEM-EDAX, HRTEM, and a surface area analyzer are used for detailed characterization of treated materials. Adsorption of arsenic on treated laterite (TL) using arsenic spiked distilled water and contaminated groundwater (CGW) is studied in the batch and fixed-bed column modes. The Langmuir isotherm fits better to the experimental data compared to the Freundlich isotherm. The Langmuir maximum capacities of As(V) and As(III) on the best-performing treated material are found to be 24.8 ± 3.9 and 8.0 ± 1.4 mg/g, respectively. Arsenic adsorption on TL follows pseudo-second-order kinetics. The Langmuir maximum adsorptions of arsenic on raw laterite and TL using CGW as the total arsenic are found to be 0.11 ± 0.01 and 7.5 ± 0.4 mg/g, respectively. In the fixed-bed column run, the 6.5 cm TL bed is capable to produce ∼3000 times the bed volume of treated water with an effluent arsenic concentration <10 μg/L using CGW as an influent. The arsenic adsorption capacity of TL is found to be 30 to 40 times higher compared to that of raw laterite. © 2010 American Chemical Society.
Citation: Industrial and Engineering Chemistry Research (2010), 49(10): 4873-4886
URI: https://doi.org/10.1021/ie100612u
http://repository.iitr.ac.in/handle/123456789/14685
Issue Date: 2010
ISSN: 8885885
Author Scopus IDs: 23994098600
55520926800
7202304528
Author Affiliations: Maiti, A., Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, Kharagpur-721302, India
Basu, J.K., Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, Kharagpur-721302, India
De, S., Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, Kharagpur-721302, India
Corresponding Author: De, S.; Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, Kharagpur-721302, India; email: sde@che.iitkgp.ernet.in
Appears in Collections:Journal Publications [PE]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.