Kinetics and thermodynamic of adsorption of chromium(VI) from aqueous solution using puresorbe

Nityanandi, D.; Subbhuraam, C.V.

doi:10.1016/j.jhazmat.2009.05.049

Cited by 59 publications

(30 citation statements)

References 35 publications

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“…Cr(VI) not Cr(III) reacts strongly with DNA, it is thought the reduction of Cr(VI) to Cr(III), either in the cytoplasm, nucleus or blood, produces free radicals which in turn can bind to DNA [21]. Breathing and holding of Cr(VI) containing material can cause perforation of the nasal septum, asthma, bronchitis, pneumonitis, inflammation of larynx and liver and increased incidence of bronchogenic carcinoma [22]. Skin contact with Cr(VI) compounds can produce skin allergies, dermatitis, dermal necrosis and dermal corrosion [23,24].…”

Section: Introductionmentioning

confidence: 99%

Biosorbents for hexavalent chromium elimination from industrial and municipal effluents

Saha

Orvig

2010

Coordination Chemistry Reviews

517

172

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Section: Introductionmentioning

confidence: 99%

Biosorbents for hexavalent chromium elimination from industrial and municipal effluents

Saha

Orvig

2010

Coordination Chemistry Reviews

517

172

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“…Although the experimental data fitted both adsorption models, the high value of the correlation coefficient associated with the Langmuir model (R 2 = 0.996 compared to 0.988 for the Freundlich isotherm) suggests monolayer coverage of the Cr(VI) on the surface of the vermiculite [30,32]. Table 3.…”

Section: Results On the Isotherm Studymentioning

confidence: 99%

“…It is therefore expected that adsorption values reach a maximum at high adsorbate concentrations [30]. Adsorption takes place at specific homogeneous sites within the adsorbent and once a metal ion occupies a site, no further adsorption occurs at that site [32].…”

Section: Langmuir Isothermmentioning

confidence: 99%

Stabilization of Cr(VI) from fine ferrochrome dust using exfoliated vermiculite

Mulange

Garbers-Craig

2012

Journal of Hazardous Materials

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“…Al trabajar la adsorción con cáscara de coco (Suksabye, Thiravetyan, Nakbanpote, & Chayabutra, 2007;González et al, 2008;Namasivayam & Sureshkumar, 2008;Nityanandi & Subbhuraam, 2009;Ewecharoen, Thiravetyan, & Nakbanpote, 2008;Anirudhan, Divya, & Ramachandran, 2008), los autores variaron los parámetros (pH, tiempo de contacto, dosis de adsorbente y temperatura) obteniendo porcentajes de remoción de 99% (Suksabye et al, 2007) En la remoción de plomo y níquel por la cáscara de avellana modificada por medio de la titulación con nitrógeno y Boehmse se logró establecer un tiempo de equilibrio de 120 min. La capacidad de adsorción en el equilibrio de las conchas se obtuvo mediante el uso de las isotermas de Langmuir y Freundlich; las condiciones de operación estuvieron en función del tiempo de contacto, 120 min; la temperatura, 298 K; la concentración, 10 g/L; y la velocidad de agitación, 150 rpm (Mohan & Pittman, 2006).…”

Section: Adsorción De Metales Pesados Por Materiales Orgánicos Dunclassified

Uso de biomasas para la adsorción de plomo, níquel, mercurio y cromo

Tovar¹,

Ortíz²,

Zarur³

2015

Ingenium

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Universidad de Cartagena, Colombia ResumenEn el presente artículo se realiza una revisión de los adsorbentes de origen orgánico para la remoción de iones metálicos presentes en una solución. Se destacan los subproductos agrícolas por estar altamente disponibles y ser económicos y eficientes; además, sus modificaciones químicas y su conversión a carbón activado son procesos que mejoran sustancialmente la eficiencia en la adsorción de los iones metálicos Pb (II), Hg (II), Ni (II), y Cr (VI), y muestran que la biosorción, aparte de ser un proceso relativamente nuevo, es eficiente en la extracción de contaminantes de efluentes acuosos. Se encontró un amplio rango de biomasas utilizadas que incluyen compuestos a partir de lignocelulosa, aserrín y hongos. El estudio de los trabajos analizados permite concluir que los diferentes tipos de biomasas son útiles para la remoción de metales pesados y que las variables como pH y tamaño de partícula afectan la eficiencia de adsorción, pero que, sin embargo, no se pueden generalizar valores óptimos debido a la selectividad de cada sistema. Palabras ClaveMetales pesados; modificaciones químicas; subproductos agrícolas. AbstractThis paper makes a revision of the organic adsorbents that are useful for the removal of metallic ions in solution. Agricultural byproducts are highlighted as they are highly available, cheap and efficient, as well as its chemical modifications and its conversion to activated carbon. These modifications improve the efficiency of absorption of metallic ions such as Pb (II), Hg (II), Ni (II), y Cr (VI), showing that biosorption, besides being a relatively new process, it is efficient for the removal of contaminants from water effluents. It was found a wide range of biomasses from compounds derived from lignocellulose, sawdust and fungus. As a conclusion, it was found that the different kinds of biomasses are useful for the removal of heavy metals. It was also observed that the pH and the particle size affects the efficiency of absorption, however, generalized values could not be proposed because of the selectivity of each system.

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Kinetics and thermodynamic of adsorption of chromium(VI) from aqueous solution using puresorbe

Cited by 59 publications

References 35 publications

Biosorbents for hexavalent chromium elimination from industrial and municipal effluents

Biosorbents for hexavalent chromium elimination from industrial and municipal effluents

Stabilization of Cr(VI) from fine ferrochrome dust using exfoliated vermiculite

Uso de biomasas para la adsorción de plomo, níquel, mercurio y cromo

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