Biosorption properties of hexavalent chromium on to biomass of tobacco‐leaf residues

Chen, Yuru; Tang, Gang; Qian, Yu; Zhang, Tingxi; Yan, Chen; Gu, Tengfei

doi:10.1080/09593330903019268

Cited by 26 publications

(7 citation statements)

References 23 publications

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“…At lower initial pH, the acidic solution favors biosorption of the negatively charged Cr(VI) species onto algae surface, thus the removal efficiency increases. The results of the present study are in agreement with previously published literature where biosorption of Cr(VI) has been investigated by non-living green algae [6] and tobacco biomass [21].…”

Section: Effect Of Initial Solution Phsupporting

confidence: 94%

Biosorption of hexavalent chromium from aqueous solution by six brown macroalgae

Koutahzadeh

Daneshvar

Kousha

et al. 2013

Desalination and Water Treatment

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A B S T R A C TThe biosorption potential of six brown macroalgae viz. Nizamuddina zanardinii, Stoechospermum marginatum, Cystoseira indica, Dictyota cervicornis, Padina australis, and Sargassum glaucescens, for the removal of hexavalent chromium (Cr(VI)) was investigated in the present study. Optimum conditions were determined by studying the effect of initial solution pH, biomass dosage, initial Cr(VI) concentration, and contact time on Cr(VI) removal by the macroalgae. Cr(VI) sorption was found to be highly pH dependent and maximum sorption was obtained at pH 1.0. Freundlich isotherm model showed the best fit with the equilibrium data. The removal rate of Cr(VI) was relatively rapid during the first 30 min, although the rate decreased gradually and the sorption reached equilibrium in about 70 min for S. marginatum, 90 min for N. zanardinii, and 150 min for D. cervicornis, P. australis, S. glaucescens, and C. indica. Different kinetic models such as pseudo-first-order, pseudo-second-order, and intra-particle diffusion model were tested, and the experimental data was in agreement with the pseudo-second-order model. The results of the present study suggest that brown macroalgae could be used as effective biosorbents for Cr(VI) removal from aqueous solution.

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Section: Effect Of Initial Solution Phsupporting

confidence: 94%

Biosorption of hexavalent chromium from aqueous solution by six brown macroalgae

Koutahzadeh

Daneshvar

Kousha

et al. 2013

Desalination and Water Treatment

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“…The advantages and disadvantages of biosorption are known, as is its potential relative to the traditional methods of treatment of heavy metal-contaminated effluents. In this context, many studies have been performed using different biosorbent materials such as yeasts [1], algae [2,3], agricultural waste [4][5][6], bacteria [7,8] and biofilms [9][10][11][12][13]. It is generally accepted that a biosorption process involves several mechanisms, mainly ion exchange, chelation, adsorption and diffusion through cell walls and membranes; depending on the species used, the origin and the processing of the biomass and the solution chemistry of some will be more relevant than others.…”

Section: Introductionmentioning

confidence: 99%

Optimization of production of extracellular polymeric substances byArthrobacter viscosusand their interaction with a 13X zeolite for the biosorption of Cr(VI)

Quintelas

Silva

et al. 2011

Environmental Technology

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In this work we aimed to optimize the production of extracellular polymeric substances (EPS) by an Arthrobacter viscosus biofilm supported on 13X zeolite to be used in the biosorption of Cr(VI). The optimization parameters were agitation rate, work volume, pH and glucose concentration. Following the optimization of EPS production, the biofilm was used in the biosorption of hexavalent Cr from liquid solutions. Differences between the use of dead or active biomass and between the performance of zeolite in powder or in pellet form were also studied. The optimized EPS production allowed values of metal uptake between 2.72 mg/g(biosorbent) and 7.88 mg/g(biosorbent) for initial Cr(VI) concentrations of 20-60 mg/L. For an initial concentration of 20 mg/L, the optimal conditions of EPS production allowed an increase of 10% on the removal percentage of total Cr, and the use of zeolite as a powder rather than the pelleted form produced an increase of 46.5% in the removal percentage. For the initial concentration of 60 mg/L, the use of active biomass compared to dried biomass allowed a reduction of the time required for the total removal of Cr(VI) from 20 to 13 days.

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“…The pseudofirst/second-order models were examined to check which one is more fitted to the experimental data. Tobacco leaf residues 113.2 (pH 1) [35] The pseudo-first-order model can be expressed as follows [36]:…”

Section: Adsorption Kineticmentioning

confidence: 99%

Removal of hexavalent chromium by using red mud activated with cetyltrimethylammonium bromide

Ding

Chang

et al. 2014

Environmental Technology

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The removal of hexavalent chromium [Cr(VI)] from aqueous solution by using red mud activated with cetyltrimethylammonium bromide (CTAB) was studied. The optimum operation parameters, such as CTAB concentration, pH values, contact time, and initial Cr(VI) concentration, were investigated. The best concentration of CTAB for modifying red mud was found to be 0.50% (mCTAB/VHCl,0.6 mol/L). The lower pH (<2) was found to be much more favourable for the removal of Cr(VI). Red mud activated with CTAB can greatly improve the removal ratio of Cr(VI) as high as four times than that of original red mud. Adsorption equilibrium was reached within 30 min under the initial Cr(VI) concentration of 100 mg L(-1). The isotherm data were analysed using Langmuir and Freundlich models. The adsorption of Cr(VI) on activated red mud fitted well to the Langmuir isotherm model, and the maximum adsorption capacity was estimated as 22.20 mg g(-1) (Cr/red mud). The adsorption process could be well described using the pseudo-second-order model. The result shows that activated red mud is a promising agent for low-cost water treatment.

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Biosorption properties of hexavalent chromium on to biomass of tobacco‐leaf residues

Cited by 26 publications

References 23 publications

Biosorption of hexavalent chromium from aqueous solution by six brown macroalgae

Biosorption of hexavalent chromium from aqueous solution by six brown macroalgae

Optimization of production of extracellular polymeric substances byArthrobacter viscosusand their interaction with a 13X zeolite for the biosorption of Cr(VI)

Removal of hexavalent chromium by using red mud activated with cetyltrimethylammonium bromide

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