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

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 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.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Sarat Chandra T,Mudliar SN,Vidyashankar S,Mukherji S,Sarada R,Krishnamurthi K,Chauhan VS

doi

10.1016/j.biortech.2014.10.018

subject

Has Abstract

pub_date

2015-05-01 00:00:00

pages

395-404

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(14)01430-8

journal_volume

184

pub_type

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