Adsorption and catalytic oxidation of organic pollutants using Fe-zeolite

DE ANGELIS, LAURA E.; RUSSO, ANALIA V.; JACOBO, SILVIA E.; ANDRADE, CESAR VELASCO

WATER SCIENCE AND TECHNOLOGY

I W A PUBLISHING

Año: 2018 vol. 77 p. 939 - 947

0273-1223

The porous structure of a modified natural clinoptilolite as a supported catalyst (NZ-A-Fe) has been investigated to explore the behavior of this material in adsorption and oxidation processes. Experiments were performed with relatively high concentrated benzene, toluene and xylene (BTX) aqueous solutions and at neutral pH, to explore the suitability of this material as a permeable reactive barrier material for aromatic hydrocarbons treatment in groundwater. BTX adsorption for diluted samples was best fitted by Freundlich equation while kinetic adsorption for high aqueous concentrated solutions was described with the pseudo-second-order kinetic model. The intraparticle diffusion scheme fits the experimental results for a relative long-time interval. NZ-A-Fe demonstrates a preliminary adsorption behavior while supports the catalyst for the oxidation Fenton-like reaction. Results showed that coupling adsorption with catalytic oxidation is a promising system to remove different BTX from aqueous solution at neutral pH without leaching of iron species.