Preparation Of Sepiolite Composite Material Treating Water And Study On Properties Of Disposing Dyestuff Containing Wastewater

Sepiolite is a kind of nonmetal clay, which has capacity of high adsorption, causticity resistant, heating stability, salty resistant and so on. In this paper, we aimed at developing it's huge potential in environmental protection.So, on the one hand, considering it's strong capacity of cation exchange, we use Fe3+ and Al3+ to alter sepiolite, and gain Fe, Al-sepiolite composite adsorption with high effectivity successfully. Then, the best composing condition and the composite adsorption's performance when disposing active blue was studied. It was found that the composite adsorption could remove the pollute at a high range, 99% of the active-blue was adsorbed during one hour, the adsorption capacity could get 58.44mg/g at a best level, which was 3-4 times more than active carbon and 9-10 times more than the originally sepiolite, under the same condition. And it could remain a high effectivity at a wide pH range and a wide range of temperature. And the composite adsorption could be regenerated and recycle, afer 12 times recycling the composite adsorption could retain high effectivity.On the other hand, Through K2S2O7 melting and tetrabutyl titanate sol, the acidity titanium dioxide sol was prepared. And then the TiO2/sepiolite composite photocatalyst was made by soaking and shaking, the composite photocatalyst's adsorption and photo-catalysis to the simulating active-blue contained wastewater was studied. It was found that, it's adsorption speed and capability have been increased by a high range, compared with the initial sepiolite, and in the system of photo-catalysis, 96 percents of active-blue was removed, it's not the results of the simple adsorption but the result of the association of photo-catalysis and adsorption, and the active-blue was mineralized completely in the process, all this can show that the titanium has embedded into the inside configuration of sepiolite. And the photo-catalysis degradation speed could be increased by the addition of H2O2 to the reaction solution. And it was found also that the composite phtocatalyst which was manufactured by K2S2O7 melting had a higher effectivity, because the tetrabutyl titanate sol which gained through K2S2O7 melting could embedded into the configuration of sepiolite.