| In this paper, The porous material based on limonite Fe/C were prepared by adding different proportions of attapulgite and goethite, a small amount of epoxy resin as a binder,and granulated, sintered under different temperature(600,700,800,900,1000 ?). Then the effective density, porosity, specific surface area and magnetic susceptibility also were measured and analyzed.Then this series porous material were used to absorb the organic substance, NH3-N and total phosphorus in secondary treatment effluent of municipal sewage, and research the effects of adsorption by different conditions. The results showed that under the sintering temperature of 900 ? (straw:palygorskite clay:goethite= 1:1:1)has the best remvol effect to COD and NH3-N, two hours later, It reached adsorption equilibrium. The remvol rate of COD and NH3-N can be up to 71.23% and 76.56%, also, the acidic condition is harmful to the removal of COD, and the best pH value of NH3-N is 8?9. It also found that under the sintering temperature of 800?(straw:palygorskite clay:goethite= 1:2:0) has the best remvol effect to total phosphorus and 15 mins later, it reached adsorption equilibrium, and the remvol rate of phosphorus can be up to 99.69%, but the pH value, rotating speed and tempeture have little effect to the adsorption of phosphorus. Select A (dosage), B (pH), C (speed) as factors to conduct orthogonal test, and this three factors were developed at three levels,and orthogonal table L9(34) was secleted to arrange test. The results were analyzed by the range analysis,and we get the optimal factor level combination is:COD(A3B2C2),NH3-N(A2B3C1),P(A3B2C3).According to the primary and secondary factors,finally, the A3B3C2 was determined the optimum conditions. |
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