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

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Title Defatted algal biomass as a non-conventional low-cost adsorbent: Surface characterization and methylene blue adsorption characteristics
 
Creator CHANDRA, TS
MUDLIAR, SN
VIDYASHANKAR, S
MUKHERJI, S
SARADA, R
KRISHNAMURTHI, K
CHAUHAN, VS
 
Subject AQUEOUS-SOLUTIONS
ACTIVATED CARBON
BIOMETHANE PRODUCTION
OEDOGONIUM SP
FATTY-ACID
BIOSORPTION
REMOVAL
EQUILIBRIUM
MICROALGAE
KINETICS
Defatted algal biomass
Langmuir and Freundlich adsorption isotherm
Methylene blue
Specific surface area
Kinetics
 
Description 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 m(2) 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. (C) 2014 Elsevier Ltd. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2016-01-14T13:05:52Z
2016-01-14T13:05:52Z
2015
 
Type Article
 
Identifier BIORESOURCE TECHNOLOGY, 184,395-404
0960-8524
1873-2976
http://dx.doi.org/10.1016/j.biortech.2014.10.018
http://dspace.library.iitb.ac.in/jspui/handle/100/17571
 
Language en