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Adsorption isotherm studies of chromium (VI) from aqueous solutions using sol-gel hydrotalcite-like compounds.
J Hazard Mater. 2009 Dec 30; 172(2-3):1527-31.JH

Abstract

In under-developed countries, industries such as paint and pigment manufacturing, leather tanning, chrome plating and textile processing, usually discharge effluents containing Cr(VI) and Cr(III) into municipal sanitary sewers. It has been reported that Cr(VI) acts as a powerful epithelial irritant and as a human carcinogen. In the present work, hydrotalcite-like compounds with a Mg/Al ratio=2 were synthesized by the sol-gel method. The hydrotalcite-like compounds and their corresponding thermally treated products were characterized by powder X-ray diffraction, infrared spectroscopy and N(2) adsorption. The hydrotalcite-like compounds and the heated solids were used as adsorbents for Cr(VI) in aqueous solutions. Adsorption isotherm studies of Cr(VI) from aqueous solution are described. The adsorbent capacity was determined using the Langmuir, Freundlich and Dubinin-Radushkevich adsorption isotherm models. The Cr(VI) adsorption isotherm data fit best to the Langmuir isotherm model. The maximum Cr(VI) uptake by hydrotalcite and the heated solids was determined using the Langmuir equation and was found to range between 26 and 29 mg Cr(VI)/g adsorbent.

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Authors+Show Affiliations

Ramos-Ramírez E
Centro de Investigaciones en Química Inorgánica de la Universidad de Guanajuato, CP 36050 Guanajuato, Gto, Mexico. ramosre@quijote.ugto.mx
Ortega NL
No affiliation info available
Soto CA
No affiliation info available
Gutiérrez MT
No affiliation info available

MeSH

AdsorptionAluminum HydroxideChromiumIndustrial WasteMagnesium HydroxidePhase TransitionSolutionsThermodynamics

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19744787

Citation

Ramos-Ramírez, Esthela, et al. "Adsorption Isotherm Studies of Chromium (VI) From Aqueous Solutions Using Sol-gel Hydrotalcite-like Compounds." Journal of Hazardous Materials, vol. 172, no. 2-3, 2009, pp. 1527-31.
Ramos-Ramírez E, Ortega NL, Soto CA, et al. Adsorption isotherm studies of chromium (VI) from aqueous solutions using sol-gel hydrotalcite-like compounds. J Hazard Mater. 2009;172(2-3):1527-31.
Ramos-Ramírez, E., Ortega, N. L., Soto, C. A., & Gutiérrez, M. T. (2009). Adsorption isotherm studies of chromium (VI) from aqueous solutions using sol-gel hydrotalcite-like compounds. Journal of Hazardous Materials, 172(2-3), 1527-31. https://doi.org/10.1016/j.jhazmat.2009.08.023
Ramos-Ramírez E, et al. Adsorption Isotherm Studies of Chromium (VI) From Aqueous Solutions Using Sol-gel Hydrotalcite-like Compounds. J Hazard Mater. 2009 Dec 30;172(2-3):1527-31. PubMed PMID: 19744787.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption isotherm studies of chromium (VI) from aqueous solutions using sol-gel hydrotalcite-like compounds. AU - Ramos-Ramírez,Esthela, AU - Ortega,Norma L Gutiérrez, AU - Soto,Cesar A Contreras, AU - Gutiérrez,Maria T Olguín, Y1 - 2009/08/13/ PY - 2008/08/28/received PY - 2009/08/05/revised PY - 2009/08/06/accepted PY - 2009/9/12/entrez PY - 2009/9/12/pubmed PY - 2010/2/10/medline SP - 1527 EP - 31 JF - Journal of hazardous materials JO - J Hazard Mater VL - 172 IS - 2-3 N2 - In under-developed countries, industries such as paint and pigment manufacturing, leather tanning, chrome plating and textile processing, usually discharge effluents containing Cr(VI) and Cr(III) into municipal sanitary sewers. It has been reported that Cr(VI) acts as a powerful epithelial irritant and as a human carcinogen. In the present work, hydrotalcite-like compounds with a Mg/Al ratio=2 were synthesized by the sol-gel method. The hydrotalcite-like compounds and their corresponding thermally treated products were characterized by powder X-ray diffraction, infrared spectroscopy and N(2) adsorption. The hydrotalcite-like compounds and the heated solids were used as adsorbents for Cr(VI) in aqueous solutions. Adsorption isotherm studies of Cr(VI) from aqueous solution are described. The adsorbent capacity was determined using the Langmuir, Freundlich and Dubinin-Radushkevich adsorption isotherm models. The Cr(VI) adsorption isotherm data fit best to the Langmuir isotherm model. The maximum Cr(VI) uptake by hydrotalcite and the heated solids was determined using the Langmuir equation and was found to range between 26 and 29 mg Cr(VI)/g adsorbent. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19744787/Adsorption_isotherm_studies_of_chromium__VI__from_aqueous_solutions_using_sol_gel_hydrotalcite_like_compounds_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)01302-8 DB - PRIME DP - Unbound Medicine ER -