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Study of CaCl2 as an agent that modifies the surface of activated carbon used in sorption/treatment cycles for nitrate removal

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Study of CaCl2 as an agent that modifies the surface of activated carbon used in sorption/treatment cycles for nitrate removal

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Título Study of CaCl2 as an agent that modifies the surface of activated carbon used in sorption/treatment cycles for nitrate removal
Autor Zanella, Odivan
Tessaro, Isabel Cristina
Feris, Liliana Amaral
Abstract The efficiency of the application of a chemically-modified activated carbon surface was investigated. The purpose of this study was to examine the effect of treatment with CaCl2 solution at a concentration of 2000 mg.L-1 on the sorption of nitrate ions from aqueous solutions in successive sorption/t reatment cycles. The sorbent was initially subjected to chemical treatment with CaCl2 and subsequently to the sorption process. Nine sorption cycles were performed. The concentrations of nitrate ions in the solution were measured by UV-Vis spectrophotometry before and after sorption. The results show that treatment with CaCl2 caused a significant increase in the percentage removal for each treatment step, reaching a removal rate of 80% of nitrate in the solution after nine cycles.
Contido em Brazilian journal of chemical engineering. São Paulo, SP. Vol. 31, no.1 (Jan./Mar. 2014), p. 205-210
Assunto Carvao ativado
Nitrato
Sorção
[en] Activated carbon
[en] CaCl2
[en] Modified surface
[en] Nitrate
[en] Sorption
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/100106
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