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Abstract:

Activated carbons were developed by phosphoric acid activation of sawdust from Prosopis ruscifolia wood, an indigenous invasive species of degraded lands, at moderate conditions (acid/precursor ratio = 2, 450 °C, 0.5 h). For in situ modification of their characteristics, either a self-generated atmosphere or flowing air was used. The activated carbons developed in the self-generated atmosphere showed higher BET surface area (2281 m2/g) and total pore volume (1.7 cm3/g) than those obtained under flowing air (1638 m2/g and 1.3 cm3/g). Conversely, the latter possessed a higher total amount of surface acidic/polar oxygen groups (2.2 meq/g) than the former (1.5 meq/g). To evaluate their metal sorption capability, adsorption isotherms of Cu(II) ion from model solutions were determined and properly described by the Langmuir model. Maximum sorption capacity (Xm) for the air-derived carbons (Xm = 0.44 mmol/g) almost duplicated the value for those obtained in the self-generated atmosphere (Xm = 0.24 mmol/g), pointing to a predominant effect of the surface functionalities on metal sequestering behaviour. The air-derived carbons also demonstrated a superior effectiveness in removing Cd(II) ions as determined from additional assays in equilibrium conditions. Accordingly, effective phosphoric acid-activated carbons from Prosopis wood for toxic metals removal from wastewater may be developed by in situ modification of their characteristics operating under flowing air. © 2008 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:In situ modification of activated carbons developed from a native invasive wood on removal of trace toxic metals from wastewater
Autor:de Celis, J.; Amadeo, N.E.; Cukierman, A.L.
Filiación:Programa de Investigacion y Desarrollo de Fuentes Alternativas de Materias Primas y Energia (PINMATE, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Pabellon Ind., Intendente Guiraldes 2620, Ciudad Univ., C1428BGA Buenos Aires, Argentina
Laboratorio de Procesos Catalíticos, Departamento de Ingeniería Química, Facultad de Ingeniería, Pabellon Ind., Intendente Guiraldes 2620, Ciudad Univ., C1428BGA Buenos Aires, Argentina
Cátedra de Farmacotecnia II, Departamento de Tecnología Farmacéutica, Facultad de Farmacia y Bioquímica, Junín 956, C1113AAD Ciudad Autonoma de Buenos Aires, Argentina
Palabras clave:Activated carbons; Invasive species; Novel precursors; Toxic metals; Wastewater treatment; Acids; Activated carbon; Adsorption; Adsorption isotherms; Atmospheric temperature; Cadmium compounds; Charcoal; Chemical oxygen demand; Metal recovery; Metals; Oxygen; Phosphoric acid; Sorption; Toxic materials; Trace elements; Wastewater; Wastewater reclamation; Wastewater treatment; Water treatment; BET Surface areas; Derived carbons; Equilibrium conditions; In-situ; Invasive species; Langmuir models; Metal sorptions; Model solutions; Novel precursors; Oxygen groups; Sorption capacities; Surface functionalities; Total amounts; Total pore volumes; Toxic metals; Chemicals removal (water treatment); activated carbon; cadmium; trace metal; activated carbon; sorption; toxicity; trace element; wastewater; wood; adsorption; article; atmosphere; Prosopis; waste water; waste water management; Carbon; Metals; Models, Chemical; Prosopis; Spectroscopy, Fourier Transform Infrared; Water Pollutants, Chemical; Water Purification; Wood; Activated Carbon; Adsorption; Cadmium; Charcoal; Isotherms; Phosphoric Acid; Waste Waters; Water Treatment; Prosopis; Prosopis ruscifolia
Año:2009
Volumen:161
Número:1
Página de inicio:217
Página de fin:223
DOI: http://dx.doi.org/10.1016/j.jhazmat.2008.03.075
Título revista:Journal of Hazardous Materials
Título revista abreviado:J. Hazard. Mater.
ISSN:03043894
CODEN:JHMAD
CAS:activated carbon, 64365-11-3, 82228-96-4; cadmium, 22537-48-0, 7440-43-9; Carbon, 7440-44-0; Metals; Water Pollutants, Chemical
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03043894_v161_n1_p217_deCelis

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Citas:

---------- APA ----------
de Celis, J., Amadeo, N.E. & Cukierman, A.L. (2009) . In situ modification of activated carbons developed from a native invasive wood on removal of trace toxic metals from wastewater. Journal of Hazardous Materials, 161(1), 217-223.
http://dx.doi.org/10.1016/j.jhazmat.2008.03.075
---------- CHICAGO ----------
de Celis, J., Amadeo, N.E., Cukierman, A.L. "In situ modification of activated carbons developed from a native invasive wood on removal of trace toxic metals from wastewater" . Journal of Hazardous Materials 161, no. 1 (2009) : 217-223.
http://dx.doi.org/10.1016/j.jhazmat.2008.03.075
---------- MLA ----------
de Celis, J., Amadeo, N.E., Cukierman, A.L. "In situ modification of activated carbons developed from a native invasive wood on removal of trace toxic metals from wastewater" . Journal of Hazardous Materials, vol. 161, no. 1, 2009, pp. 217-223.
http://dx.doi.org/10.1016/j.jhazmat.2008.03.075
---------- VANCOUVER ----------
de Celis, J., Amadeo, N.E., Cukierman, A.L. In situ modification of activated carbons developed from a native invasive wood on removal of trace toxic metals from wastewater. J. Hazard. Mater. 2009;161(1):217-223.
http://dx.doi.org/10.1016/j.jhazmat.2008.03.075