%0 Journal Article
%T Reducci車n de percloroetileno y cromo hexavalente mediante FE(0) y bioestimulaci車n de microorganismos anaerobios
%A V芍ZQUEZ MORILLAS
%A Alethia
%A VACA MIER
%A Mabel
%A BELTR芍N VILLAVICENCIO
%A Margarita
%A L車PEZ CALLEJAS
%A Raymundo
%A 芍LVAREZ
%A Pedro J
%J Revista internacional de contaminaci車n ambiental
%D 2007
%I Universidad Nacional Aut車noma de M谷xico
%X fe-microorganisms interactions in and around permeable reactive barriers, for reduction of perchloroethylene and hexavalent chromium in polluted aquifers were examined. biostimulation was done by the addition of a co-substrate for microbial communities already present in the soil. an hydrogen release compound (hrc), a commercial co-substrate which releases lactic acid at slow rates in presence of water was selected. results show that hrc addition increases (>100 %) the reduction of pce in iron-containing systems. nevertheless, reductive dechlorination was not complete and caused accumulation of toxic metabolites such as trichloroethylene. for chromium reduction, bioestimulation enhanced reduction capability of the systems by 20 %. in this case, the effect was not stimulation of cr-reducers, but the improvement of redox conditions.
%K perchloroethylene
%K hexavalent chromium
%K hydrogen release compound
%K zero-valent iron
%K permeable reactive barriers.
%U http://www.scielo.org.mx/scielo.php?script=sci_abstract&pid=S0188-49992007000200001&lng=en&nrm=iso&tlng=en