Síntesis y caracterización de compositos de zeolita con óxido de grafeno reducido para la remoción de metales pesados

Abstract

For years there has been an increasing concern about environmental pollution, therefore, there has been a growing activity in the field of research and development, as well as in the implementation of sustainable technologies in industrial processes has managed to reduce excessive pollution to the environment. The aim of this work was to synthesize and characterize zeolite and reduced graphene oxide composites for the removal of heavy metals. Reduced graphene oxide (GOr) synthesized by Hummers method and reduced with ascorbic acid (AA) was used, the resulting product of both GO and GOr was characterized spectroscopically and morphologically testing the obtaining of both materials. Subsequently, the functionalization of zeolite with GOr where 2 grams of zeolite were mixed with 1mL of concentrated H_2 SO_(4 )and 25 ml of GOr these were mixed in a boiling flask and subjected to reflux for 24 hours at 100℃ this was subsequently washed with absolute ethanol and subjected to the respective adsorption tests where the contact time is detailed, This determined that at times of (90, 60 and 90 )min and temperatures of (19, 25 and 35°C respectively, the active sites of the material were saturated at that instant the adsorption of mercury behaved in a slower way until reaching the equilibrium point, By means of the kinetic model it was determined that the R2 values are extremely low, which shows a null correlation between the data, so the adsorption kinetics does not adjust to a pseudo first order behavior in all the tests, in the diffusion process it was determined that the increase in temperature does not influence the adsorption process since at 19°C the highest adsorption values were obtained.