%0 Journal Article
%T ESTUDIO DE REDUCCI¨®N FOTOCATALIZADA DE CROMO HEXAVALENTE
%A TAPIA
%A JAIME
%A FREER
%A JUANITA
%A MANSILLA
%A HECTOR
%A VILLASE£¿OR
%A JORGE
%A BRUHN
%A CARLOS
%A BASUALTO
%A SILVIA
%J Bolet¨ªn de la Sociedad Chilena de Qu¨ªmica
%D 2002
%I Scientific Electronic Library Online
%R 10.4067/S0366-16442002000400018
%X a methodology to decrease the chromium concentration cr(vi) existing in tannery discharges is suggested. the proposal is based on a photocatalytic process in which the effluent is irradiated by uv light in presence of tio2 as a catalyst employing formaldehyde as a reductor agent. were employed different cr(vi) solutions of 100 mg/l as models at different ph, catalyst quanties and irradiation times. the variable optimization was made from multivaried analysis. the better conditions for to reduction a 50 ml of a cr(vi) of 100 mg/l solutions were ph 2 at 20 minutes of uv irradiation and 40 mg of tio2 load. in these conditions it was possible a 97.8 % of cr(vi) reduction level. for a real effluent from tannery industries the reduction level was 81.3 %.
%K hexavalent chromium
%K photocatalysis
%K tannery discharges.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0366-16442002000400018&lng=en&nrm=iso&tlng=en