陶基湿地填料碳化改性前后吸附性能比较分析

Comparative Analysis of Adsorption Performance of Wetland Ceramsite Filler Before and After Carbonization Modification

为探究改善陶粒填料的表面性质,以达到增强湿地水处理效果的目的,对陶粒进行碳化改性并考察其在静态和模拟湿地运行条件下对废水的吸附处理效果。得出以下结果:①陶粒碳化改性后表面孔隙增多,形貌更规则,表面主要呈凸起颗粒状,碳化改性后陶粒比表面积增加近7.43倍;②附碳后陶粒对TN、TP的饱和吸附能力均明显提高;③在模拟垂直流湿地运行试验条件下,改性陶粒对TP、TN、氨氮及CODMn的最高去除率分别达到63.7%、52.06%、71.26%和47.82%,均高于改性前陶粒和火山石。

In order to improve the surface properties of the ceramsite filler to achieve the purpose of enhancing the water treatment effect of the wetland,this paper conducts carbonization modification on ceramsite to research its adsorption effect on wastewater under static and simulated-wetland operating conditions.The following conclusions are drawn:①After the carbonization of the ceramsite,the surface porosity increases,the morphology becomes more regular,the surface is mainly convex granules,and the specific surface area of carbonized ceramsite increases by 7.43 times.②The saturated adsorption capacity of ceramsite to TN and TP increases significantly after carbonization;③Under simulated vertical-flow wetland operating conditions,the maximum removal rates of TP,TN,ammonia nitrogen and COD Mn by modified ceramsite are 63.7%,52.06%,71.26%and 47.82%,respectively,which are higher than those by ceramsite and volcanic rock before modification.