Study On Microwave Modified Activated Carbon And Its Removal Of Aniline And Cr(Ⅵ)

In this paper, different ways of microwave modified activated carbon were studied, and also had studied the effects conditions about modified activated carbon and the absorption influence factor. According to the effect of elimination aniline and the Cr(VI) selected the more appropriate, more simple and more economical microwave modified craft.Take the aniline and Cr(VI) adsorption effect as a goal,studied and compared five of the activated carbon modified methods, screened two kinds of activated carbon modified methods: nitric acid-microwave modified activated carbon (called GACH-M) and microwave modified activated carbon.For nitric acid-microwave modified activated carbon the paper focused on the study of different nitric acid concentration, microwave power, irradiation time, nitrogen ventilation quantity about GACH-M modified activated carbon processed aniline and the Cr(VI) waste water effect. And then the paper investigated the adsorption of pollutants impact factors (just as wastewater pH, initial concentration of wastewater, activated carbon dosage). Found out the best modified factors and adsoption impact factors. GACH-M adsorption of Cr(VI) like to use the dynamic model of the secondary fitting false.Whether the microwave modified activated carbon did pass over the gas was the object for study, had studied carried the nitrogen microwave modified activated carbon (GACN2-M) and the non-carried gas microwave modified activated carbon (GACM) the effect difference. Investigated microwave power, irradiation time and nitrogen ventilation quantity on modified carbon and the adsorption elimination aniline and the Cr(VI) effect. The results showed that the higher the microwave power, irradiation time longer, GACM adsorbed aniline the better; but two kinds of microwave modified activated carbon were bad for the Cr(VI) adsorption effect, which were lower than the original carbon. The GACM adsorption of aniline fit suitably with the dynamic model of the secondary.GACH-M, GACN2-M and GACM were characterized through SEM, the surface analyzer, Boehm titration and pHpzc titration test, characterization results show that: the three modified carbon surface changed roughly, had the obvious crack, many blocking holes were opened, and extended; the proportion of modified carbon mesoporous increased, porosity increased, the proportion of large holes up to 50% decline; the modified carbon acidic functional groups reduced, basic functional groups increased , the pHpzc show for alkaline and were higher than the original carbon.Microwave radiation as a modified method for activated carbon modified made the carbon adsorbed aniline from wastewater have the potential applications GACH-M for Cr(VI) wastewater had a high removal efficiency of adsorption.