Influence of iron content, surface area and charge distribution in the arsenic removal by activated carbons

Javier A. Arcibar-Orozco, Delgado Balbuena Josue, Jorge C. Rios-Hurtado, Jose Rene Rangel Mendez

Resultado de la investigación: Contribución a una revistaArtículo

50 Citas (Scopus)

Resumen

Due to the high number of toxicological issues, the presence of asenic (V) in water supplies is a major problem of public concern. Adsorption by iron modified activated carbons stands as an interesting alternative for the removal of arsenic (V) from aqueous solutions. However, the question of which of the activated carbon properties have impact during arsenic (V) uptake has arisen. The influence of textural and chemical features of several activated carbons (AC), un-modified and modified with iron oxyhydroxide nanoparticles, for the removal of arsenic (V) from aqueous solution was studied. The surface area (SBET), micropore volume, surface charge and iron content of 28 ACs were determined. Results showed that the SBET of materials range from 388 to 1747 m2/g, the point of zero charge (PHPZC) from 3 to 11 and the iron content range from negligible to around 2%. A detailed data analysis demonstrated that the most important parameter of AC when removing arsenic (V) from water is the pHPZC (52.5% of contribution); however, the presence of iron is indispensable for enhancing the adsorption capacity (by 36.5%). An empirical model indicated that in order to effectively remove arsenic from water a basic AC with an iron content of about 1% is desirable. Arsenic (V) adsorption isotherms under normal conditions demonstrated that the materials studied have a great potential for water polishing. Finally it is suggested that the arsenate uptake by iron-modified AC is conducted by two simultaneous mechanisms: ligand interchange with iron oxyhydroxide particles and electrostatic attraction on basic AC.

Idioma originalInglés
Páginas (desde-hasta)201-209
Número de páginas9
PublicaciónChemical Engineering Journal
Volumen249
DOI
EstadoPublicada - 1 ago 2014

Huella dactilar

Charge distribution
Arsenic
Activated carbon
activated carbon
arsenic
Iron
surface area
iron
adsorption
Water
aqueous solution
Adsorption
Interchanges
arsenate
Surface charge
removal
distribution
Polishing
Adsorption isotherms
Water supply

Citar esto

Arcibar-Orozco, Javier A. ; Josue, Delgado Balbuena ; Rios-Hurtado, Jorge C. ; Rangel Mendez, Jose Rene. / Influence of iron content, surface area and charge distribution in the arsenic removal by activated carbons. En: Chemical Engineering Journal. 2014 ; Vol. 249. pp. 201-209.
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abstract = "Due to the high number of toxicological issues, the presence of asenic (V) in water supplies is a major problem of public concern. Adsorption by iron modified activated carbons stands as an interesting alternative for the removal of arsenic (V) from aqueous solutions. However, the question of which of the activated carbon properties have impact during arsenic (V) uptake has arisen. The influence of textural and chemical features of several activated carbons (AC), un-modified and modified with iron oxyhydroxide nanoparticles, for the removal of arsenic (V) from aqueous solution was studied. The surface area (SBET), micropore volume, surface charge and iron content of 28 ACs were determined. Results showed that the SBET of materials range from 388 to 1747 m2/g, the point of zero charge (PHPZC) from 3 to 11 and the iron content range from negligible to around 2{\%}. A detailed data analysis demonstrated that the most important parameter of AC when removing arsenic (V) from water is the pHPZC (52.5{\%} of contribution); however, the presence of iron is indispensable for enhancing the adsorption capacity (by 36.5{\%}). An empirical model indicated that in order to effectively remove arsenic from water a basic AC with an iron content of about 1{\%} is desirable. Arsenic (V) adsorption isotherms under normal conditions demonstrated that the materials studied have a great potential for water polishing. Finally it is suggested that the arsenate uptake by iron-modified AC is conducted by two simultaneous mechanisms: ligand interchange with iron oxyhydroxide particles and electrostatic attraction on basic AC.",
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Influence of iron content, surface area and charge distribution in the arsenic removal by activated carbons. / Arcibar-Orozco, Javier A.; Josue, Delgado Balbuena; Rios-Hurtado, Jorge C.; Rangel Mendez, Jose Rene.

En: Chemical Engineering Journal, Vol. 249, 01.08.2014, p. 201-209.

Resultado de la investigación: Contribución a una revistaArtículo

TY - JOUR

T1 - Influence of iron content, surface area and charge distribution in the arsenic removal by activated carbons

AU - Arcibar-Orozco, Javier A.

AU - Josue, Delgado Balbuena

AU - Rios-Hurtado, Jorge C.

AU - Rangel Mendez, Jose Rene

PY - 2014/8/1

Y1 - 2014/8/1

N2 - Due to the high number of toxicological issues, the presence of asenic (V) in water supplies is a major problem of public concern. Adsorption by iron modified activated carbons stands as an interesting alternative for the removal of arsenic (V) from aqueous solutions. However, the question of which of the activated carbon properties have impact during arsenic (V) uptake has arisen. The influence of textural and chemical features of several activated carbons (AC), un-modified and modified with iron oxyhydroxide nanoparticles, for the removal of arsenic (V) from aqueous solution was studied. The surface area (SBET), micropore volume, surface charge and iron content of 28 ACs were determined. Results showed that the SBET of materials range from 388 to 1747 m2/g, the point of zero charge (PHPZC) from 3 to 11 and the iron content range from negligible to around 2%. A detailed data analysis demonstrated that the most important parameter of AC when removing arsenic (V) from water is the pHPZC (52.5% of contribution); however, the presence of iron is indispensable for enhancing the adsorption capacity (by 36.5%). An empirical model indicated that in order to effectively remove arsenic from water a basic AC with an iron content of about 1% is desirable. Arsenic (V) adsorption isotherms under normal conditions demonstrated that the materials studied have a great potential for water polishing. Finally it is suggested that the arsenate uptake by iron-modified AC is conducted by two simultaneous mechanisms: ligand interchange with iron oxyhydroxide particles and electrostatic attraction on basic AC.

AB - Due to the high number of toxicological issues, the presence of asenic (V) in water supplies is a major problem of public concern. Adsorption by iron modified activated carbons stands as an interesting alternative for the removal of arsenic (V) from aqueous solutions. However, the question of which of the activated carbon properties have impact during arsenic (V) uptake has arisen. The influence of textural and chemical features of several activated carbons (AC), un-modified and modified with iron oxyhydroxide nanoparticles, for the removal of arsenic (V) from aqueous solution was studied. The surface area (SBET), micropore volume, surface charge and iron content of 28 ACs were determined. Results showed that the SBET of materials range from 388 to 1747 m2/g, the point of zero charge (PHPZC) from 3 to 11 and the iron content range from negligible to around 2%. A detailed data analysis demonstrated that the most important parameter of AC when removing arsenic (V) from water is the pHPZC (52.5% of contribution); however, the presence of iron is indispensable for enhancing the adsorption capacity (by 36.5%). An empirical model indicated that in order to effectively remove arsenic from water a basic AC with an iron content of about 1% is desirable. Arsenic (V) adsorption isotherms under normal conditions demonstrated that the materials studied have a great potential for water polishing. Finally it is suggested that the arsenate uptake by iron-modified AC is conducted by two simultaneous mechanisms: ligand interchange with iron oxyhydroxide particles and electrostatic attraction on basic AC.

KW - Activated carbon

KW - Adsorption

KW - Arsenic removal

KW - Iron oxyhydroxides

KW - Surface area

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U2 - 10.1016/j.cej.2014.03.096

DO - 10.1016/j.cej.2014.03.096

M3 - Artículo

AN - SCOPUS:84898936937

VL - 249

SP - 201

EP - 209

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

ER -