A comparative study for the biosorption characteristics of chromium(VI) on ca‐alginate, agarose and immobilized c<i>vulgaris</i>in a continuous packed bed column

Aksu, Zümríye; Eğretli, G.; Kutsal, Tülin

doi:10.1080/10934529909376837

Cited by 28 publications

(14 citation statements)

References 16 publications

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“…These techniques have significant disadvantages including incomplete metal removal, the need for expensive equipment and monitoring systems, high reagent or energy requirements or generation of toxic sludge or other waste products that require disposal 4 .…”

Section: Introductionmentioning

confidence: 99%

[Retracted] Removal of Lead from Synthetic Solutions by Protonated Teleosts Biomass

Ashraf

Maah

Yusoff

2011

Journal of Chemistry

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Abstract:Lead is considered as a general protoplasmic poison which is cumulative and slow acting. It is used in different industrial processes. Its contamination in water may cause serious environmental problems. So removal of lead from environment is very necessary. For its removal the most suitable and cheapest process is biosorption. It is a process of passive metal binding by biomass. The biosorbent used in this study is teleosts biomass (fish scales) collected from local market. The purpose of this study is to search the effect of acid treatment on biosorbent and to optimize conditions for the uptake capacity of biosorbent. The optimal conditions for the Pb 2+ biosorption capacity of teleosts biomass (fish scales as waste of white meat) was investigated. For this purposes, the biomass was subjected to chemical treatments with mono, di and tri-protic acids such as hydrochloric acid, sulphuric acid and phosphoric acid. Among the treatment methods used, the highest Pb 2+ uptake was obtained with hydrochloric acid treatment of biomass. The effect of pH, biomass granular size, biomass concentration and initial Pb 2+ ion concentration was studied. The highest Pb 2+ removal (65.39%) was obtained at pH 4.0 for 50 mg L -1 initial lead ion concentration with biomass granular size 80 micron and concentration of 0.05 g. The uptake was 75.70 mg g -1 . The equilibrium data were analyzed using the Langmuir and Freundlich adsorption isotherm. The characteristic parameters for each isotherm were determined. Both the isotherms provided the best correlation for Pb 2+ on to the biomass. These results showed that teleosts biomass (fish scales) is a potential biomass to remove Pb +2 ions from synthetic solutions so also with lead contaminated water. These values can be compared with those observed for other biosorbents and it is considerably higher than the value obtained with the majority of the biosorbent.

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Section: Introductionmentioning

confidence: 99%

[Retracted] Removal of Lead from Synthetic Solutions by Protonated Teleosts Biomass

Ashraf

Maah

Yusoff

2011

Journal of Chemistry

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“…Rhizopus arrhizus), yeast (e.g. Saccharomyces cerevisiae) as a waste biomass resulted from fermentation process and some food industries have been suggested as potential heavy metal biosorbents [6,11]. For the economical reason, researchers have paid much attention to various by-products from fermentation industry, because they are produced in large quantities.…”

Section: Introductionmentioning

confidence: 99%

“…Different developed methods that could be used to remove dissolved heavy metal ions from wastewaters include chemical precipitation, chemical oxidation and reduction, ion exchange, filtration, electrochemical treatment membrane technologies, adsorption on activated carbon and evaporative recovery [5]. These techniques have significant disadvantages including incomplete metal removal, the need for expensive equipment and monitoring system, high reagent or energy requirement or generation of toxic sludge or other waste products that require disposal [6]. They also are ineffective when metal ion concentration in aqueous solution is as low as ppm (parts per millions) levels.…”

Section: Introductionmentioning

confidence: 99%

Application of response surface methodology for optimization of cadmium biosorption in an aqueous solution by Saccharomyces cerevisiae

Ghorbani

Younesi

Ghasempouri

et al. 2008

Chemical Engineering Journal

275

127

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“…The concentration of hexavalent chromium, Cr(VI), in the culture media was determined spectrophotometrically using 1, 5-diphenylcarbazide as complexing agent [24,[28][29][30]. One milliliter (1 ml) of 0.2 % w/v of 1, 5-diphenylcarbazide solution (prepared in 95% ethanol and 1 ml of 1 / 5 H 2 SO 4 ) was added to 1 ml of the sample solution.…”

Section: Determination Of Cr(vi) Cr(iii) and Cr T Concentrations In mentioning

confidence: 99%

Uptake and Reduction of Hexavalent Chromium by Aspergillus Niger and Aspergillus Parasiticus

Shugaba¹,

Buba²,

Bg³

et al. 2012

J Pet Environ Biotechnol

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The uptake and reduction of Cr(VI) by Aspergillus niger and A. parasiticus was studied in this journal. After 96 hours of growth, the culture solutions spiked with an initial dichromate concentration of 20 mg/l, were completely decolorized and had residual Cr(VI) concentrations of only 0.74 ± 0.55 and 1.69 ± 0.29 mg/l in A. niger and A. parasiticus cultures representing Cr(VI) removal of 96.3% and 91.6%, respectively. In the A. niger culture, significantly (P < 0.01) lower Cr(VI) concentrations were observed within 72 hours of growth compared to those of A. parasiticus, but in both cultures complete removal was almost achieved by 144 hours of growth. The rate of Cr(VI) removal was 0.21 ± 0.09 mgl -1 hr -1 and 0.20 ± 0.07 mgl -1 hr -1 for A. niger and A. parasiticus, respectively. Cellular concentrations of Cr(VI) in the two fungi increased significantly (P < 0.05 -0.001) with increasing concentrations of the dichromate treatments. Although tannic acid as sole source of carbon and energy gave significantly lower Cr(VI) removal than glucose (P < 0.001) and acetate (P < 0.01), it supported the removal of about 85.0% and 68.8% of the metal ion by A. niger and A. parasiticus, respectively. The active mycelia of both fungi showed significantly (P < 0.001) higher Cr(VI) removal than inactivated mycelia after incubation at 30°C for 72 hours. Incubation of cell -free extracts of both fungi with NADH at 30°C for 2 hours showed Cr(VI) reduction of 68.0% and 55.5% for A. niger and A. parasiticus, respectively. These findings suggest that uptake and metabolic reduction may be the process by which the two fungi are able to tolerate the toxic effects of hexavalent chromium. However, Cr removal via uptake by the two fungal biomass was observed to be in the range of 0.5 -1.78% only, for all the concentrations applied, which is insignificant when compared with the initial Cr concentration in the culture medium. The results obtained through this investigation indicate the possibility of treating waste effluents containing hexavalent chromium using Aspergillus niger and A. parasiticus.

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A comparative study for the biosorption characteristics of chromium(VI) on ca‐alginate, agarose and immobilized cvulgarisin a continuous packed bed column

Cited by 28 publications

References 16 publications

[Retracted] Removal of Lead from Synthetic Solutions by Protonated Teleosts Biomass

[Retracted] Removal of Lead from Synthetic Solutions by Protonated Teleosts Biomass

Application of response surface methodology for optimization of cadmium biosorption in an aqueous solution by Saccharomyces cerevisiae

Uptake and Reduction of Hexavalent Chromium by Aspergillus Niger and Aspergillus Parasiticus

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