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

被引：74
作者：
Chandra, T. Sarat [1 ,3 ,4 ]
Mudliar, S. N. [4 ]
Vidyashankar, S. [4 ]
Mukherji, S. [3 ]
Sarada, R. [4 ]
Krishnamurthi, K. [2 ]
Chauhan, V. S. [4 ]
机构：
[1] CSIR, Natl Environm Engn Res Inst, Environm Biotechnol Div, Nagpur, Maharashtra, India
[2] CSIR, Natl Environm Engn Res Inst, Div Environm Hlth, Nagpur, Maharashtra, India
[3] Indian Inst Technol, Ctr Environm Sci & Engn, Bombay, Maharashtra, India
[4] CSIR, Cent Food Technol Res Inst, Plant Cell Biotechnol Dept, Mysore, Karnataka, India
来源：
BIORESOURCE TECHNOLOGY | 2015年 / 184卷
关键词：
Defatted algal biomass; Langmuir and Freundlich adsorption isotherm; Methylene blue; Specific surface area; Kinetics; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; BIOMETHANE PRODUCTION; OEDOGONIUM SP; FATTY-ACID; BIOSORPTION; REMOVAL; EQUILIBRIUM; MICROALGAE; KINETICS;
D O I：
10.1016/j.biortech.2014.10.018
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
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.
引用
收藏
页码：395 / 404
页数：10
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