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Hindi Research Article
Experimental and Kinetic Studies on Acid Red 88 Dye (AR88) Adsorption by Azolla filiculoides
| Davoud Balarak1 and Yousef Mahdavi2* | |
| 1Department of Environmental Health, Health Promotion Research Center, School of Public Health, Zahedan University of Medical Sciences, Zahedan, Iran | |
| 2MSc Student of Environmental Health engineering, Student Research Committee, Mazandaran University of Medical Sciences, Mazandaran, Iran | |
| Corresponding Author : | Yousef Mahdavi MSc Student of Environmental Health engineering Student Research Committee, Mazandaran University of Medical Sciences, Mazandaran, Iran Tel: 0098-9388517121 E-mail: mahdaviyusef@gmail.com |
| Received: August 08, 2015; Accepted: December 03, 2015; Published: January 01, 2016 | |
| Citation: Balarak D, Mahdavi Y (2016) Experimental and Kinetic Studies on Acid Red 88 Dye (AR88) Adsorption by Azolla filiculoides. Biochem Physiol 5:190. doi:10.4172/2168-9652.1000190 | |
| Copyright: © 2016 Balarak D, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. | |
Abstract
The use of Azolla filiculoides (AF) for the removal of Acid Red 88 dye (AR88) from aqueous solutions at different contact times, temperatures, pH, adsorbent doses and initial dye concentration was investigated. The extent of dye removal decreased with increasing adsorbent dosage and AR88 concentration, also increased with increasing contact time and temperature. The adsorption isotherms are described by means of the Langmuir, Freundlich, Tempkin and Sips isotherms. It was found that the Langmuir equation fit better than the other equation. Maximum adsorption capacity (qm) was calculated at different temperatures (20, 30, 40 and 50°C) 22.45, 23.95, 25.29 and 26.17 mg/g, respectively. The adsorption kinetics of Acid Red 88 could be described by the pseudo-second-order reaction model. The obtained results are: (1) high levels of color removal (>98%) were achieved with low contact times adsorbent/dye (less than 90 min contact); and (2) the whole Azolla filiculoides can be successfully used as adsorbent of AR88 in aqueous solutions. Azolla biomass, an inexpensive and easily available material, can be alternative for more costly adsorbents used for dye removal in wastewater treatment processes.
