%0 Journal Article
%T ELIMINACI¨®N DE COLORANTES CATI¨®NICOS USANDO OZONO, ZEOLITA NATURAL Y OZONO/ZEOLITA
%A Vald¨¦s
%A H¨¦ctor
%A Tard¨®n
%A Rolando F
%A Zaror
%A Claudio A
%J Ingeniare. Revista chilena de ingenier¨ªa
%D 2009
%I Scientific Electronic Library Online
%R 10.4067/S0718-33052009000300009
%X this paper compares experimental results on methylene blue (mb) removal systems based on ozone oxidation, zeolite adsorption, and simultaneous adsorption-oxidation using ozone in the presence of natural zeolite. the effect of ph (2-8), and the presence of radical scavengers (sodium acetate) on process rates and removal efficiencies are assessed at laboratory scale. the experimental system consisted of a 1l differential circular flow reactor and an ozone generator rated at 5 g o3/h. results show that ozone oxidation combined with zeolite adsorption increases the overall mb oxidation rate with respect to ozonation process and zeolite adsorption. in presence of free radical scavenger, only a 25% of reduction on mb removal rate are observed in the simultaneous treatment, as compared with 70 % when ozonation treatment is used, suggesting that mb oxidation reactions take mainly place on the zeolite surface.
%K adsorption
%K cationic dyes
%K catalytic ozonation
%K methylene blue
%K ozone
%K natural zeolite.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0718-33052009000300009&lng=en&nrm=iso&tlng=en