Kinetic and equilibrium models for the biosorption of Cr(III) on<i>Streptomyces rimosus</i>

Sahmoune, Mohamed Nasser; Louhab, K.; Boukhiar, Aissa; Addad, J. P. Cohen; Barr, Stewart

doi:10.1080/02772240802613731

Cited by 27 publications

(16 citation statements)

References 19 publications

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“…Moreover, at low pH, competition occurs between protons and Cr (III) ions, leading to less metal uptake. Similar tendencies were also recognized in Cr (III) biosorption by diverse biosorbents [3,18,30,34,35,46]. Hexavalent chromium exists in the form of oxyanions such as HCrO 4 2 , Cr 2 O 7 22 , CrO 4 22 , depending on the pH [45].…”

Section: Influence Of Phmentioning

confidence: 76%

“…The ionic strength as indicated by the presence of light metals in solution is an important variable that plays a role in the aqueous phase equilibrium. Miscellaneous inorganic chemicals, e.g., NaCl, KNO 3 have been employed to elucidate the effect of ionic strength on chromium uptake. As a general trend, the chromium uptake is found to decrease with increasing ionic strength of the aqueous solution as a result of more electrostatic attraction and metal activity change [8,33,44].…”

Section: Effect Of Ionic Strengthmentioning

confidence: 99%

“…Cr (III) and Cr (VI) are the chromium oxidation states usually encountered in the environment [2]. Cr (III) is listed as an essential microtrace element that is required for sugar metabolism of human; it is poisonous only at high concentration [3]. On the other hand, Cr (III), is less toxic than Cr (VI).…”

Section: Introductionmentioning

confidence: 99%

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Advanced biosorbents materials for removal of chromium from water and wastewaters

Sahmoune

Louhab

Boukhiar

2011

Env Prog and Sustain Energy

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As we known, it is very expensive and ineffective to remove chromium ions from wastewaters using conventional methods when the chromium concentration is low (1–100 mg L−1). Thus, it is very necessary to develop alternative technologies now. A biosorption technology in which dead biomass is used to accumulate chromium is a method that can replace conventional processes for remediating chromium pollution in wastewaters. Biosorbents are prepared from naturally abundant and/or waste biomass. Because of the high uptake capacity and very cost‐effective source of the raw material, biosorption is a progression toward a perspective method. An overview of advanced biosorbents for the removal of chromium is reported with special emphasis on the recent investigations on biosorption of chromium in water and wastewater. © American Institute of Chemical Engineers Environ Prog, 2011.

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Section: Influence Of Phmentioning

confidence: 76%

Section: Effect Of Ionic Strengthmentioning

confidence: 99%

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Advanced biosorbents materials for removal of chromium from water and wastewaters

Sahmoune

Louhab

Boukhiar

2011

Env Prog and Sustain Energy

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“…Langmuir [14] and Freundlich [15] models were the most commonly used isotherm. Sahoune et al [16] studied the kinetic and adsorption model for the biosorption of Cr 3+ on streptomyces rimosus. The results showed that the equilibrium model and kinetic fitted to Langmuir isotherm and the pseudo-second-order, respectively.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium models and kinetic for the adsorption of methylene blue on Co-hectorites

Jia

Jing

et al. 2010

Journal of Hazardous Materials

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“…The adsorption kinetics which describes the mechanism of the adsorption process in a given system were determined in this study using pseudo-first order model as defined by Lagergren and described by Chang et al and Sivaraj et al [14,25], pseudo-second order model [14], Elovich Model [26], intraparticle diffusion model [27] and the power function technique [28].…”

Section: Adsorption Kinetics Modelsmentioning

confidence: 99%

Comparative Study of the Adsorption and Desorption Behavior of Single and Multi-Ring Aromatics in Sediment Fractions

Owabor¹,

Agarry²,

Ayodele³

et al. 2013

ACES

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The sorption behaviour of benzene, toluene, ethyl benzene, xylene and naphthalene using clay and sand sediments under ambient conditions is examined in this study. Experimental results showed that, the time taken to attain adsorption equilibrium for naphthalene, and BTEX were 28, 30, 30, 32, 28 hrs and 20, 22, 22, 24, 22 hrs while the desorption equilibrium time were 10, 13, 12, 15, 12 hrs and 9, 9, 9, 11, 10 hrs in clay and sand respectively. All of the naphthalene, and BTEX were adsorbed at the different equilibrium times, using clay while the amount of naphthalene and BTEX adsorbed by sand, at different equilibrium times were 117, 121, 127, 123 and 134 mg. Following the results of the adsorption/desorption experiments, quantitative measurements showed that sand exhibited higher affinity for the solute as retained more chemicals (as high as between 58% -66%) within it pores while nearly all the chemicals adsorbed by the clay were released at the attainment of equilibrium. The implication of this is that occlusion within the sand particles may likely be the resultant effect of continued sand-chemicals contact. The amount of contaminant solute adsorbed and desorbed affirmed that clay has a better capacity to retain naphthalene and BTEX than sand and this may not be unrelated to its large surface area, high porosity and higher hydraulic conductivity for the solutes arising from its good binding sites (small pore sizes) that tend to hold the adsorbates to its particles.

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Kinetic and equilibrium models for the biosorption of Cr(III) onStreptomyces rimosus

Cited by 27 publications

References 19 publications

Advanced biosorbents materials for removal of chromium from water and wastewaters

Advanced biosorbents materials for removal of chromium from water and wastewaters

Equilibrium models and kinetic for the adsorption of methylene blue on Co-hectorites

Comparative Study of the Adsorption and Desorption Behavior of Single and Multi-Ring Aromatics in Sediment Fractions

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