Surface Modification of New Ceramics and Application Research in the Pretreatment of Light-polluted Water

Using Fe(NO3)3 as the modifying agent to modify a new type of porous environmental ceramics filter medium and pre-treating the micro-polluted water with the modified ceramics filters,the paper has the conclusion that using the modified ceramics filters can reduce organic matter in the following process and enhance the water quality of outflow.The iron oxide/ceramics modified filter medium was prepared by heating vaporization.The best modifying conditions was confirmed,which contains pH value at seven,Fe(NO3)3 with the density of 2 mol/L,roasting temperature at 550 centigrade,the times of modifying for four times.Compared with the numerical value using ceramics filters,the rate of removing COD was enhanced six to eight times.The surface morphologies of the modified filter medium were observed by SEM,which showed that iron oxide film being fine particle were attached to the ceramics,it is benefit for enhancing adsorption capability.The matter species of iron oxide film were analyzed by XRD,which showed that it contains α-Fe2O3 and α-FeOOH,they are helpful for removing organic matter.