Treatment of an industrial effluent by reverse osmosis

Padilla, Antonio Pérez; Tavani, Eduardo L.

doi:10.1016/s0011-9164(99)00178-2

Cited by 85 publications

(42 citation statements)

References 6 publications

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“…Conventional methods for removing Cr(VI) ions from industrial wastewater include reduction (Kim et al, 2002), reduction followed by chemical precipitation (Ozer et al, 1997), adsorption on activated carbon (Lotfi and Adhoum, 2002), solvent extraction (Mauri et al, 2001), freeze separation, reverse osmosis (Padilla and Tavani, 1999), ion exchange (Rengaraj et al, 2003) and electrolytic methods (Namasivayam and Yamuna, 1995). These methods have found limited application because they often involve high capital and operational costs.…”

Section: Introductionmentioning

confidence: 99%

Removal of hexavalent chromium using coffee husk

Ahalya

Kanamadi

Ramachandra

2010

IJEP

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Abstract:The potential to remove chromium(VI) from aqueous solutions through biosorption using coffee husk was investigated. The effects of pH, contact time, initial concentration and adsorbent dosage on the adsorption of Cr(VI) were studied. The data obeyed Langmuir and Freundlich adsorption isotherms. The Langmuir adsorption capacity was found to be 44.95 mg/g. The Freundlich constants K f and n were 1.027 [mg/g (l/mg) n ] and 1.493, respectively. Desorption studies indicated the removal of 60% of the hexavalent chromium. Infrared spectral studies revealed the presence of functional groups, such as hydroxyl and carboxyl groups, on the surface of the biomass, which facilitates biosorption of Cr(VI).

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Section: Introductionmentioning

confidence: 99%

Removal of hexavalent chromium using coffee husk

Ahalya

Kanamadi

Ramachandra

2010

IJEP

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“…Conventional methods for removing Cr(VI) ions from industrial wastewater include reduction (Kim et al, 2002), reduction followed by chemical precipitation (Ozer et al, 1997), adsorption on the activated carbon (Lotfi and Adhoum, 2002), solvent extraction (Mauri et al, 2001) cementation, freeze separation, reverse osmosis (Padilla and Tavani, 1999), ion-exchange (Rengaraj et al, 2003) and electrolytic methods (Namasivayam and Yamuna, 1995). These methods have found limited application because they often involve high capital and operational costs.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of aqueous chromium(VI) by Tamarindus indica seeds

Agarwal¹,

Bhuptawat

Chaudhari

2006

Bioresource Technology

258

101

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“…Face à ce préjudice environnemental, plusieurs procédés de dépollution ont été développés pour éliminer le Cr (VI) des effluents industriels ayant comme objectifs la protection de l'environnement et l'éventuelle réutilisation des eaux, surtout dans les pays arides. Parmi ces techniques, on cite la réduction suivie d'une précipitation chimique (OZER et al, 1997), l'échange ionique (RENGARAG et al, 2003), l'osmose inverse (PADILLA et TAVANI, 1999) et l'adsorption sur charbons actifs commerciaux (LOTFI et ADHOUM, 2002).…”

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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Treatment of an industrial effluent by reverse osmosis

Cited by 85 publications

References 6 publications

Removal of hexavalent chromium using coffee husk

Removal of hexavalent chromium using coffee husk

Biosorption of aqueous chromium(VI) by Tamarindus indica seeds

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

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