Biosorption of chromium VI by free and immobilized Rhizopus arrhizus

Prakasham, R. S.; Merrie, J.Sheno; Sheela, R.; Saswathi, N.; Ramakrishna, S. V.

doi:10.1016/s0269-7491(98)00174-2

Cited by 198 publications

(84 citation statements)

References 13 publications

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“…In this respect, Kantar et al (2008) indicate that some ferric organic compounds facilitate the stabilization of Cr(VI) in acid to slightly alkaline soils due to the catalytic reduction of Cr(VI) to Cr(III). Sorption data were satisfactory fitted to the Freundlich model through nonlinear regression (Table 3), as other authors found for various bio-sorbents (Cetinkaya-Donmez et al, 1999;Prakasham et al, 1999). Due to the fact that the Freunlich model considers that, theoretically, sorption could be infinite, the fitting to this equation means that sorption maximum would not be easily predictable for these materials.…”

Section: Discussionsupporting

confidence: 64%

Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration

et al. 2015

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Abstract. We used batch-type experiments to study Cr(VI) sorption/desorption on granitic material, forest soil, pyritic material, mussel shell, and on forest soil and granitic material amended with 12 t ha −1 (1.2 kg m −2 ) shell, considering the effects of varying Cr(VI) concentration and pH. Sequential extractions were carried out to fractionate adsorbed Cr(VI) and to determine the stability of Cr(VI) retention. The pyritic material had the highest Cr(VI) retention capacity, whereas the granitic material showed the lowest retention potential. When high Cr concentrations were added, some saturation of the adsorbent surfaces became apparent, but Cr release remained low. The highest Cr retention was achieved at a very acid pH value, with release progressively increasing as a function of increasing pH. The amendment with 12 t ha −1 mussel shell did not cause marked changes in Cr(VI) retention. Sorption data were satisfactory adjusted to the Freundlich model. Regarding Cr(VI) fractionation, the soluble fraction (weakly bound) was dominant in mussel shell and in the unamended and amended granitic material, whereas more stable fractions dominated in the pyritic material (residual fraction) and in the forest soil (oxidizable fraction). In conclusion, the pyritic material presented the highest Cr(VI) retention capacity, while the retention was low and weak on the granitic material; mussel shell was not characterized by a marked Cr(VI) retention potential, and it did not cause remarkable increase in Cr(VI) retention when used to amend the granitic material or the forest soil.

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Section: Discussionsupporting

confidence: 64%

Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration

et al. 2015

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“…The increase in biosorption indicates the endothermic nature of the biosorption process, as previously reported for other adsorbent systems [32,10].…”

Section: Effect Of Temperature On Biosorptionsupporting

confidence: 83%

The removal of metals (Cd, Cu and Zn) from the Tensift river using the diatom Navicula subminuscula Manguin: A laboratory study

Cherifi¹,

Sbihi²,

Bertrand³

et al. 2016

Int. J. Adv. Res. Biol. Sci.

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Various biomaterials have shown promise as sorbents to remove heavy metals from polluted waters at lower cost than conventional wastewater treatment technologies. The aim of this study is to characterize the ability of the freshwater diatom Navicula subminuscula Manguin to biosorb cadmium, copper and zinc from aqueous solutions. Our results indicate that the biosorption of metals by N. subminuscula increased as the initial concentration of metal ions increased in the medium until a concentration of 100-130 mg L -1 . Biosorption equilibrium was established in 30 minutes. The maximum metal ions biosorbed was found to be 42, 90 and 127 for 16 10 8 diatoms per liter for Cd, Cu and Zn, respectively. The maximum uptake of metals was obtained at pH 6.0 for Cu and at pH 8.0 for Cd and Zn. An increase in the biosorption of P. lanceolatum was observed with an increase in temperature from 15 to 25°C. The biosorption of all three metal ions followed the Langmuir isotherm. Competitive biosorption of cadmium, copper and zinc ions was also achieved. The FTIR (Fourier Transformed Infra Red spectroscopy) results of algal biomass revealed the different functional groups at the diatom surface that are able to react with metals in the medium. The results all together suggest that N. subminusculacan be used as a biosorbent for an efficient removal of heavy metals from aqueous solutions which temperature and pH values could be close to the mean ones of the Tensiftriver.

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“…Prakasham et al (1999) and Kadimpati et al (2013) suggested that the removal of heavy metals by adsorption on various biomass surfaces is the best alternative to the physico and chemical methods. In recent years, many researchers used the various bio-materials such as tea factory waste (Cay et al 2004;Nuhoglu 2005, 2006), sawdust (Acar and Malkoc 2004;Yu et al 2003), soya cake (Daneshvar et al 2002), sugar cane bagasse (Gupta and Ali 2004), green algae (Gupta et al 2001;Malkoc and Nuhoglu 2003), distillery sludge (Selvaraj et al 2003) for removal of heavy metals from waste waters.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of mangrove leaf powder for bioremediation of chromium (VI) from aqueous solutions: kinetic and thermodynamic evaluation

et al. 2014

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Biosorption of heavy metals by bio-materials has been posited as a potential alternative to the existing physicochemical technologies for detoxification and recovery of toxic and valuable metals from wastewaters. In this context, the role of mangrove leaf powder (MLP) as biosorbent for chromium removal was investigated. In the present study, the effect of process parameters such as particle size, solution pH, initial concentration of Cr(VI) ion and adsorbent dose on chromium removal by MLP was investigated. The maximum sorption was observed at particle size 0.5 mm and pH 2.0. The adsorption data follow the pseudo second-order kinetics model. The isotherms denote that Langmuir model is the best fitted than Freundlich model. The maximum adsorption capacity (Q 0 ) of 60.24 mg/g of Cr(VI) at 30 min on MLP was determined using the Langmuir model. The adsorption isotherm model indicates that the chromium is adsorbing as monolayer on the surface of MLP with heterogeneous energetic distribution of active sites. Various thermodynamic parameters, such as Gibb's free energy (DG°), enthalpy (DH°) and entropy (DS°) have been calculated. The thermodynamic data revealed that the adsorption of chromium ions onto MLP is endothermic in nature and a spontaneous process. The results of the present study suggest that MLP is an effective bioremediation measure for removal of high concentration of Cr(VI) in waste waters.

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Biosorption of chromium VI by free and immobilized Rhizopus arrhizus

Cited by 198 publications

References 13 publications

Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration

Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration

The removal of metals (Cd, Cu and Zn) from the Tensift river using the diatom Navicula subminuscula Manguin: A laboratory study

Efficacy of mangrove leaf powder for bioremediation of chromium (VI) from aqueous solutions: kinetic and thermodynamic evaluation

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