Biosorption behavior of azo dye by inactive CMC immobilized Aspergillus fumigatus beads

Wang, Baoe; Hu, Yongyou; Xie, Lei; Peng, Kang-Lin

doi:10.1016/j.biortech.2007.01.043

Cited by 109 publications

(59 citation statements)

References 29 publications

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“…Several researchers have worked on microbial adsorbents such as Corynebacterium glutamicum [4], Trametes versicolor [5], Penicillium chrysogenum [6], Rhizopus arrhizus [7] and Aspergillus fumigatus [8] for dye adsorption. Very minimal works have been done with bacteria and their exopolysaccharides with regard to metal removal but not on dye removal [9].…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Procion Red MX 5B by Bacillus subtilis and Its Extracellular Polysaccharide: Effect of Immobilization

Binupriya

Sathishkumar

et al. 2010

CLEAN Soil Air Water

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Research Article Biosorption of Procion Red MX 5B by Bacillus subtilis and Its Extracellular Polysaccharide: Effect of ImmobilizationBacillus subtilis and its extracellular polysaccharide (EPS) were used in free form as well as immobilized form as biosorbent for the removal of an anionic dye Procion Red MX 5B. Low pH was favourable for biosorption. Immobilization resulted in reduced biosorption of the dye. The presence of functional groups responsible for the high adsorption capacity in free cells (FC) and EPS was confirmed by FTIR analysis. High Q max and b values were noted in the case of FC and free EPS in contrast to immobilized cells and EPS. The kinetics data showed that the adsorption system followed pseudo-first-order reaction at low dye concentration. Desorption of the dye was found to be 100% in 1 N NaOH. In the case of immobilized biomass and EPS the alginate was found to be unstable under high alkaline conditions of NaOH. IntroductionTextiles industries consume large amounts of water, particularly for bleaching and dyeing purposes. Textile industries contribute considerable amount of effluent of varying characteristics such as color, dissolved solids and various organic and inorganic substances. Treatment of the textile effluent normally involves neutralization, coagulation followed by biological treatment. This treatment involves large amount of acid, coagulants and energy. Attempts have been made to substitute microorganisms for chemicals. While most textile dyes have low aquatic toxicity, the discharge of highly colored untreated or partially treated textile mill effluents can impair the aesthetic value of receiving waters while also affecting water transparency and gas solubility, which may in turn negatively affect aquatic biota. The majority of technologies presently employed for color removal are based on physicochemical processes such as dilution, adsorption, coagulation and flocculation, chemical precipitation, oxidation, ion-exchange, reverse osmosis and ultra filtration [1]. Although adsorption on to activated carbon gained prominence as a treatment technology, its high cost and associated problems of regeneration have led to the constant search for alternate efficient low cost adsorbents [2]. Apart from agricultural and industrial wastes that have formed the bulk of low cost adsorbents, microbial adsorbents also form a major group of biosorbents which are being studied for their application in dye and metal removal technologies. Dye adsorption studies using microorganisms has been carried out by many researchers [3]. Several researchers have worked on microbial adsorbents such as Corynebacterium glutamicum [4], Trametes versicolor [5], Penicillium chrysogenum [6], Rhizopus arrhizus [7]and Aspergillus fumigatus [8] for dye adsorption. Very minimal works have been done with bacteria and their exopolysaccharides with regard to metal removal but not on dye removal [9]. EPS are heterogeneous mixture composed mainly of polysaccharides and proteins, with nucleic acids and lipids as minor constit...

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Section: Introductionmentioning

confidence: 99%

Biosorption of Procion Red MX 5B by Bacillus subtilis and Its Extracellular Polysaccharide: Effect of Immobilization

Binupriya

Sathishkumar

et al. 2010

CLEAN Soil Air Water

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“…The intra-particle diffusion or the Weber and Morris model describes processes involved in the sorption of the sorbate by sorbent (Wang et al, 2008;Qui et al, 2009). These include transport of the solute molecules from the aqueous phase to surface of sorbent particles and diffusion of the solute molecules into the pores of Figure 10.…”

Section: Intra-particle Diffusionmentioning

confidence: 99%

Silica gel matrix immobilized Chlorophyta hydrodictyon africanum for the removal of methylene blue from aqueous solutions: Equilibrium and kinetic studies

Muzarabani¹,

Mupa²,

Gwatidzo³

et al. 2015

Afr. J. Biotechnol.

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Chlorophyta hydrodictyon africanum was immobilized on a silica gel matrix to improve its mechanical properties. The algae-silica gel adsorbent was used for batch sorption studies of a cationic dye, methylene blue (MB). Optimum adsorption was obtained with a dosage of 0.8 g bio sorbent. Results from sorption studies show that 124.11 mg·g -1 of MB could be adsorbed at an optimum pH of 8 and immobilization of 300 mg per gram silica. Maximum immobilization was 400 mg biomass per gram silica. Sorption capacity increased with an increase in initial dye concentration and reached equilibrium within 30 min. Three models were used to simulate kinetic data and the pseudo-second order model gave a better fit with R 2 greater than 0.98 in all cases. Equilibrium studies revealed that the adsorption of MB followed Freundlich isotherm (R 2 =1.00).

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“…Immobilization of dead biomass is more effective than living biomass because complication in biosorbent kinetics due to cell growth can be eliminated (Benyahra and Polomarkaki, 2005). Different polymeric matrix are used in the immobilization process such as, polysulfone (Puranik and Paknikar, 1999;Beolchini et al, 2003), polyacrylamide and alginate (Bai and Abraham, 2003;Asghar and Bhatti, 2010), polyurethane (Hu and Reeves, 1997), carboxy methyl cellulose (CMC) (Wang et al, 2008), etc.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of direct dyes by low cost rice husk: Effect of treatments and modifications

Safa¹,

Bhatti²

2011

Afr. J. Biotechnol.

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In the present study, free, carboxymethyl cellulose (CMC)-immobilized, polyvinyl alcohol (PVA)-alginate immobilized and chemically treated rice husk biomass was used for the biosorption of Everdirect Orange-3GL and Direct Blue-67 dyes. Maximum biosorption capacity of free, immobilized and hydrochloric acid treated biomass was observed for both dyes at low pH. Comparative study of free, immobilized and HCl treated biomass showed that, the HCl treated biomass exhibited more biosorption capacity (29.98 and 37.92 mg/g) for Everdirect Orange-3GL and Direct Blue-67, respectively. Equilibrium time was less for HCl treated biomass when compared with immobilized biomass. The Langmuir type 1 and 2 models were best fitted to experimental data for free, CMC, polyvinyl alcohol-alginate immobilized and HCl treated biomass in case of Everdirect Orange-3GL, while the equilibrium data of Direct Blue-67 followed the Langmuir type 2 isotherm. Pseudo-second-order and Elovich kinetic models illustrated good fitness to all types of biomasses showing chemisorption nature of biosorption. The amount of dyes sorbed (mg/g) increased with increase in temperature. The values of Gibbs free energy (∆G°) showed that reaction was spontaneous at high temperature.

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Biosorption behavior of azo dye by inactive CMC immobilized Aspergillus fumigatus beads

Cited by 109 publications

References 29 publications

Biosorption of Procion Red MX 5B by Bacillus subtilis and Its Extracellular Polysaccharide: Effect of Immobilization

Biosorption of Procion Red MX 5B by Bacillus subtilis and Its Extracellular Polysaccharide: Effect of Immobilization

Silica gel matrix immobilized Chlorophyta hydrodictyon africanum for the removal of methylene blue from aqueous solutions: Equilibrium and kinetic studies

Adsorptive removal of direct dyes by low cost rice husk: Effect of treatments and modifications

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