Application of nanofiltration in the recovery of chromium (III) from tannery effluents

Ortega, Lina M.; Lebrun, Rémi E.; Noël, Isabelle M.; Häusler, Robert

doi:10.1016/j.seppur.2004.12.002

Cited by 62 publications

(29 citation statements)

References 16 publications

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“…Nanofiltration has been considered a promising technology for arsenic removal [177]. Nanofiltration membranes have been investigated for chromium (III) removal [178]. The main factors that contribute to the removal efficiency are transmembrane pressures, flow rates, and concentrations.…”

Section: Nps Pollution Control By Nanofiltrationmentioning

confidence: 99%

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Shan

Surampalli²,

Tyagi

et al. 2009

Front. Environ. Sci. Eng. China

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Nanomaterials are applicable in the areas of reduction of environmental burden, reduction/treatment of industrial and agricultural wastes, and nonpoint source (NPS) pollution control. First, environmental burden reduction involves green process and engineering, emissions control, desulfurization/denitrification of nonrenewable energy sources, and improvement of agriculture and food systems. Second, reduction/treatment of industrial and agricultural wastes involves converting wastes into products, groundwater remediation, adsorption, delaying photocatalysis, and nanomembranes. Third, NPS pollution control involves controlling water pollution. Nanomaterials alter physical properties on a nanoscale due to their high specific surface area to volume ratio. They are used as catalysts, adsorbents, membranes, and additives to increase activity and capability due to their high specific surface areas and nano-sized effects. Thus, nanomaterials are more effective at treating environmental wastes because they reduce the amount of material needed.

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Section: Nps Pollution Control By Nanofiltrationmentioning

confidence: 99%

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Shan

Surampalli²,

Tyagi

et al. 2009

Front. Environ. Sci. Eng. China

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“…The solvent velocity within the pore (V) related to the pressure gradient through the pore can be described using the Hagen-Poiseuille expression (7), where the osmotic pressure difference is calculated by Van't Hoff equation (8). (7 [-].…”

Section: Dsp Model Descriptionmentioning

confidence: 99%

Removal of Cr(III) ions from salt solution by nanofiltration: experimental and modelling analysis

Kowalik-Klimczak

Zalewski

Gierycz

2016

Polish Journal of Chemical Technology

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The aim of this study was experimental and modelling analysis of the nanofi ltration process used for the removal of chromium(III) ions from salt solution characterized by low pH. The experimental results were interpreted with Donnan and Steric Partitioning Pore (DSP) model based on the extended Nernst-Planck equation. In this model, one of the main parameters, describing retention of ions by the membrane, is pore dielectric constant. In this work, it was identifi ed for various process pressures and feed compositions. The obtained results showed the satisfactory agreement between the experimental and modelling data. It means that the DSP model may be helpful for the monitoring of nanofi ltration process applied for treatment of chromium tannery wastewater.

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“…In addition, batch and column experiments using biological waste material (sawdust, rice husk, coir pith and charcoal) and a naturally occurring mineral (vermiculite) have been tested for their effectiveness in removing Cr from tannery effluent. The biosorbent and mineral vermiculite in column format were found to be very effective in removing Cr from tannery effluent (Sumathi et al 2005 (Ortega et al 2005). Additional methods for recovery of Cr from tannery waste solutions have been proposed, including separation of Cr(III) by oxidation to Cr(VI) with sulfuric acid (Macchi et al 1991) and bio-leaching using a novel mixture of ironand sulfur-oxidizing bacteria (Zhou et al 2006), as well as ion exchange (Kabir et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Selective recovery of chromium ions from waste tannery solution for preparation of chromium oxide nanoparticles

El‐Sheikh

Rabah

2015

Int. J. Environ. Sci. Technol.

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This investigation seeks to reduce the environmental impact of the tanning process by recovering Ca and Cr from tannery waste solution. The treatment process reduces both the amount of Cr discharged to the environment and the amount of raw Cr extracted from natural resources. The procedure was based on the selective separation of Ca ions from the waste solution as Ca oxalate, prior to the recovery of Cr as the hydroxide precipitate at pH 6.5. The dried Cr hydroxide cake was then subjected to heating (heating rate 0.5°C min -1 ) at different temperatures up to 500°C to produce Cr oxide nanoparticles. The physicochemical characteristics of the nanoparticles were investigated using X-ray diffraction, Fourier transform infrared, scanning electron microscopy, transmission electron microscopy, surface area measurement and thermal analysis. Results revealed that heating of the treated Cr hydroxide at 300°C yielded amorphous Cr oxide, while with heating at 400°C, the Cr oxide started to crystallize to hexavalent, trivalent and divalent Cr species. At 500°C, a pure phase consisting of trivalent Cr oxide nanoparticles was formed that contained traces of hexavalent Cr. A mechanism for the formation of the different forms of Cr oxide was proposed and confirmed by XRD.

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Application of nanofiltration in the recovery of chromium (III) from tannery effluents

Cited by 62 publications

References 16 publications

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Removal of Cr(III) ions from salt solution by nanofiltration: experimental and modelling analysis

Selective recovery of chromium ions from waste tannery solution for preparation of chromium oxide nanoparticles

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