Defatted algal biomass as a non-conventional low-cost adsorbent: Surface characterization and methylene blue adsorption characteristics

Sarat Chandra, T. and Mudliar, S. N. and Vidyashankar, S. and Mukherji, S. and Sarada, R. and Krishnamurthi, K. and Chauhan, V. S. (2015) Defatted algal biomass as a non-conventional low-cost adsorbent: Surface characterization and methylene blue adsorption characteristics. Bioresource Technology, 184. pp. 395-404.

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Abstract

The present study investigates the use of defatted algal biomass (DAB) as a non-conventional low cost adsorbent. The maximum adsorption capacity of biomass (raw, defatted and sulfuric acid pretreated DAB) was determined by liquid phase adsorption studies in batch mode for the removal of methylene blue present at various concentrations (1, 2, 3, 4, and 5 mg L�1) from aqueous solutions. The data was well fitted with Langmuir and Freundlich isotherms. The maximum adsorption capacity for raw, defatted and sulfuric acid pretreated DAB was found to be 6.0, 7.73 and 7.80 mg g�1, respectively. The specific surface area of raw, defatted and sulfuric acid pretreated DAB was estimated to be 14.70, 18.94, and 19.10 m2 g�1, respectively. To evaluate the kinetic mechanism that controls the adsorption process, pseudo-first order, pseudo-second order, intraparticle diffusion and particle diffusion has been tested. The data fitted quite well with pseudo-second order kinetic model.

Item Type:	Article
Uncontrolled Keywords:	Defatted algal biomass, Langmuir and Freundlich adsorption, isotherm, Methylene blue, Specific surface area, Kinetics
Subjects:	600 Technology > 08 Food technology > 29 Microbiological food > 01 Algae
Divisions:	Plant Cell Biotechnology
Depositing User:	Somashekar K S
Date Deposited:	11 Mar 2025 06:34
Last Modified:	11 Mar 2025 06:34
URI:	http://ir.cftri.res.in/id/eprint/19261

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