DETERMINATION OF HEXAVALENT CHROMIUM ADSORPTION KINETICS AND EQUILIBRIUM ISOTHERMS IN AQUEOUS SOLUTIONS CONTAINING ACTIVATED COCONUT SHELL CHARCOAL

DETERMINATION OF HEXAVALENT CHROMIUM ADSORPTION KINETICS AND EQUILIBRIUM ISOTHERMS IN AQUEOUS SOLUTIONS CONTAINING ACTIVATED COCONUT SHELL CHARCOAL

MENESES, A. C. de; LUZ, A. D. da; LUZ, C. da; ZIN, G.

Artigo:

Hexavalent chromium has toxic and carcinogenic effects and is often found contaminating in surface waters. In the present study, coconut shell charcoal (CSC) thermally and chemically activated with acetic acid was used for the removal of Cr(VI) from aqueous solutions. The increase in temperature reduced the adsorption capacity, indicating exothermic adsorption. Adsorption kinetics was best analyzed for pseudo-second order model exhibited the best correlation coefficient (R

Hexavalent chromium has toxic and carcinogenic effects and is often found contaminating in surface waters. In the present study, coconut shell charcoal (CSC) thermally and chemically activated with acetic acid was used for the removal of Cr(VI) from aqueous solutions. The increase in temperature reduced the adsorption capacity, indicating exothermic adsorption. Adsorption kinetics was best analyzed for pseudo-second order model exhibited the best correlation coefficient (R

Palavras-chave:

DOI: 10.5151/chemeng-cobeq2014-0114-26978-145457

Referências bibliográficas

• [1] AL-OTHMAN, Z.A., ALI, R., NAUSHAD. M. Hexavalent chromium removal from aqueous, solution medium by activated carbon prepared from peanut shell: Adsorption kinetics, equilibrium and thermodynamic studies, Chem. Eng. J. 184, 238-247 (2012). ANANDKUMAR, J., MANDAL, B. Removal of Cr(VI) from aqueous solution using Bael fruit (Aegle marmelos correa) shell as an adsorbent, J. Hazard. Mater. 168, 633–640 (2009). BOEHM, H. P. Surface oxides on carbon and their analysis: a critical assessment, Carbon, 40, 145-149 (2002). Área temática: Fenômenos de Transporte e Sistemas Particulados 7DURANOGLU, D., TROCHIMCZUK, A.W., BEKER, U. Kinetics and thermodynamics of hexavalent chromium adsorption onto activated carbon derived from acrylonitrile-divinylbenzene copolymer, Chem. Eng. J. 187, 193-202 (2012). GUPTA, V.K., RASTOGI, A., NAYAK, A. Adsorption studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer industry waste material, J. Colloid Interface Sci. 342, 135–141 (2010). JING, G., ZUOMING, Z., SONG, L.S., DONG, M. Ultrasound enhanced adsorption and desorption of chromium(VI) on activated carbon and polymeric resin, Desalination, 279, 423-427 (2011). KARTHIKEYAN, T., RAJGOPAL, S., MIRANDA, L.R. Chromium adsorption from aqueous solution by Hevea Brazilinesis sawdust activated carbon, J. Hazard. Mater. B124, 192-199 (2005). KOBYA, M., DEMIRBAS, E., SENTUR, E., INCE, M. Adsorption of heavy metal ions from aqueous solutions by activated carbon prepared from apricot stone, Bioresour. Technol. 96, 1518–1521 (2005). MEENA, A.K., MISHRA, G.K., RAI, P.K., RAJAGOPAL, C., NAGAR, P.N. Removal of heavy metal ions from aqueous solution using carbon aerogel as an adsorbent, J. Hazard. Mater. 122, 161-170 (2005). MOHAN, S., GANDHIMATHI, R. Removal of heavy metal ions from municipal solid waste leachate using coal fly ash as an adsorbent, J. Hazard. Mater. 169, 351–359 (2009). PARK, D., LIM, S.R., YUN, Y.S., PARK, J.M. Reliable evidences that the removal mechanism of hexavalent chromium by natural biomaterials is adsorption-coupled reduction, Chemosphere. 70, 298–305 (2007). RADNIA, H., GHOREYSHI, A.A, YOUNESI, H. Isotherm and kinetics of Fe(II) Adsorption onto Chitosan in a batch process, Iranica J. Energy e Environ. 3, 250-257 (2011). RICHTER, C.A., NETTO, J.M.A. Tratamento de água: Tecnologia atualizada, Blucher, São Paulo, (1991). SALAM, O.E.A., REIAD, N.A., ELSFAFEI, M.M. A study of removal characteristics of heavy metals from wastewater by low-cost adsorvents, J. Adv. Res. 2, 297-303 (2011). SUBRAMANYAM, B., ASHUTOSH, D. Adsorption Isotherm Modeling of Phenol Onto Natural soils - Applicability of Various Isotherm Models, Int. J. Environ. Res. 6, 265-276 (2012). ULSON DE SOUZA, S.M.A.G., LUZ, A. D., SILVA, A., ULSON DE SOUZA, A.A. Removal of Mono- and Multicomponent BTX Compounds from Effluents Using Activated Carbon from Coconut Shell as the Adsorbent, Ind. Eng. Chem. Res. 51, 6461-6469 (2012). UMPLEBY, R.J., BAXTER, S.C., CHEN, Y., SHAH, R.N., SHIMIZU, K.D. Characterization of molecularly imprinted polymers with the Langmuir-Freundlich isotherm, Anal. Chem. 73, 4584-4591 (2001). WAN NGAH, W.S., HANAFIAH, M.A.K.A. Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbent: A review, Bioresour. Technol. 99, 3935-3948 (2008). WU, F.-C., TSENG, R.-L., JUANG, R.-S. Kinetic modeling of liquid-phase adsorption of reactive dyes and metal ions on chitosan, Water Res. 35, 613-618 (2001).

Como citar:

MENESES, A. C. de; LUZ, A. D. da; LUZ, C. da; ZIN, G.; "DETERMINATION OF HEXAVALENT CHROMIUM ADSORPTION KINETICS AND EQUILIBRIUM ISOTHERMS IN AQUEOUS SOLUTIONS CONTAINING ACTIVATED COCONUT SHELL CHARCOAL", p-5250-5257. In: Anais do XX Congresso Brasileiro de Engenharia Química - COBEQ 2014 [= Blucher Chemical Engineering Proceedings, v.1, n.2]. São Paulo: Blucher, 2015.
ISSN 23591757, DOI 10.5151/chemeng-cobeq2014-0114-26978-145457