Biosorption of chromium(VI) from aqueous solution by cone biomass of Pinus sylvestris

Ucun, Handan; Bayhan, Yalçın Kemal; Kaya, Yusuf; Çakıcı, Avni; Algur, Ömer Faruk

doi:10.1016/s0960-8524(02)00086-x

Cited by 191 publications

(108 citation statements)

References 15 publications

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“…Epidemiological studies in various geographical locations have consistently reported increased risks of lung cancer among workers engaged in chromate production, chromate pigment production, and chromium plating. Chromium and its compounds are widely used in metal finishing and chrome plating, in leather tanning, and in wood preservative industries producing large quantities of toxic pollutants and also used in textile dyeing processes, printing inks, drilling muds, pyrotechnics, water treatment, and chemical synthesis [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Temperature on Equilibrium, Kinetic and Thermodynamic Parameters of Biosorption of Cr(VI) onto Fish Scales as Suitable Biosorbent

Kondapalli¹,

Mohanty²

2011

JWARP

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In this work the potential of fish scales as a suitable biosorbent for removal of Cr(VI) ions from aqueous solutions was investigated at various temperatures. The influence of temperature on equilibrium, kinetics as well as thermodynamic parameters was investigated. Various isotherm models such as Langmuir, Freundlich, R -P, D -R, Temkin and Halsey were used for the mathematical description of the biosorption of Cr(VI) ions onto fish scales. It was observed that Freundlich model exhibited the best fit to experimental data.Amongst the various kinetic models tested, the pseudo-first-order kinetic model represented the best correlation for the biosorption of Cr(VI) onto fish scales at various temperatures. In addition, various thermodynamic parameters such as ∆G o , ∆H o and ∆S o were also determined. The biosorption of Cr(VI) was found to be a spontaneous and endothermic process.

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Section: Introductionmentioning

confidence: 99%

Influence of Temperature on Equilibrium, Kinetic and Thermodynamic Parameters of Biosorption of Cr(VI) onto Fish Scales as Suitable Biosorbent

Kondapalli¹,

Mohanty²

2011

JWARP

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“…Parmi ces matrices adsorbantes, on cite l'algue verte Spirogyra sp. (GUPTA, 2001), les cônes de pin (UCUN et al, 2002), les semences d'Ocimum basilicum (MELO et D'SOUZA, 2004), des biomasses fongiques (PARK et al, 2005) et les déchets d'Araucaria angustifolia (BRASIL et al, 2006). L'objectif principal de cette recherche est d'étudier, dans une optique d'optimisation, l'influence de quelques paramètres clés sur la capacité de biosorption du chrome (VI) par une biomasse marine très disponible et bon marché, Posidonia oceanica (L.), et ce, à partir de solutions aqueuses artificiellement polluées.…”

Section: Introductionunclassified

Étude de la biosorption du chrome (VI) par une biomasse méditerranéenne : Posidonia oceanica (L.) delile

Ncibi

Mahjoub

Seffen³

2008

rseau

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Les fibres du végétal marin Posidonia oceanica (L.) ont été utilisées en tant que nouvel adsorbant biologique pour l’élimination du chrome hexavalent des solutions aqueuses artificiellement contaminées. Les expériences ont été effectuées en lots aussi bien pour les cinétiques que pour les isothermes d’adsorption. Les variables expérimentales étudiées sont le pH, la température, la quantité de biomasse et la concentration initiale de Cr(VI). Le maximum de biosorption a été observé pour un pH 2. La capacité de biosorption semble être optimisée par une augmentation de la température, de la quantité de biosorbant et de la concentration initiale. Les isothermes d’adsorption sont en accord avec les modèles de Redlich-Peterson et Langmuir. De plus, l’analyse thermodynamique a révélé que le présent processus d’adsorption est un phénomène favorable, endothermique et spontané.The marine biomass Posidonia oceanica (L.) fibres were used as a novel low cost biological adsorbent for the removal of hexavalent chromium from artificially contaminated aqueous solutions. Experiments were carried out for sorption kinetics and isotherms in a batch system. The operating variables studied were pH, temperature, biomass quantity and initial chrome concentration. The maximum adsorption removal was observed at pH 2. The biosorption capacity of P. oceanica fibres for Cr(VI) was enhanced by increasing the temperature, the biosorbent amount and initial chromium concentration. The isotherm adsorption data were satisfactorily found to be described by both Redlich-Peterson and Langmuir. Besides, the thermodynamic studies revealed that the present adsorption process is a favourable, endothermic and spontaneous phenomenon

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“…Secondary waste from the biosorption-based process is readily treated and can be easily disposed by incineration. Thus, the adsorptive separation of Cr(VI) by microorganisms [1][2][3][4][5][6], algae [7], and plant biomass [8,9] have been investigated. Many of these studies focused on the adsorption of Cr(VI) under strongly acidic conditions (pH [1][2][3] because the adsorption amount of Cr(VI) onto these biomaterials steeply decreased above pH 3.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of chromium(VI) and arsenic(V) onto methylated yeast biomass

Seki

Suzuki

Maruyama

2005

Journal of Colloid and Interface Science

137

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Yeast biomass was methylated in a 0.1 M HCl methyl alcohol solution at room temperature and the methylated yeast (MeYE) was applied to the adsorptive separation of Cr(VI) and As(V) anions from aqueous solutions.At near neutral pH, while Cr(VI) and As(V) anions were scarcely adsorbed onto unmethylated yeast biomass, their adsorbed amounts increased with increasing methylation degree. The amount of Cr(VI) adsorbed onto MeYE was almost constant at pH4 -6 and decreased with increasing pH above pH 6. The adsorbed amount of As(V) onto MeYE was rather lower than that of Cr(VI) and it had a peak at about pH 7. A metal-binding model was used to describe the adsorption characteristics of Cr(VI) and As(V) onto MeYE.The results showed that MeYE has two different types of adsorption sites.The saturated adsorbed amount of Cr(VI) and As(V) onto MeYE having methylation degree 0.94 was 0.55 mmol g -1 .

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Biosorption of chromium(VI) from aqueous solution by cone biomass of Pinus sylvestris

Cited by 191 publications

References 15 publications

Influence of Temperature on Equilibrium, Kinetic and Thermodynamic Parameters of Biosorption of Cr(VI) onto Fish Scales as Suitable Biosorbent

Influence of Temperature on Equilibrium, Kinetic and Thermodynamic Parameters of Biosorption of Cr(VI) onto Fish Scales as Suitable Biosorbent

Étude de la biosorption du chrome (VI) par une biomasse méditerranéenne : Posidonia oceanica (L.) delile

Biosorption of chromium(VI) and arsenic(V) onto methylated yeast biomass

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