鉴于量广面大的餐饮废水大多无序排放,且导致水体富营养化等问题,选用陶粒、黑火山石、绿沸石和海泡石等4种矿物基吸附材料为研究对象,采用准一级/准二级动力学模型与Langmuir/Freundlich等温吸附的方法研究了这4种材料的吸附特性,并比较和分析了这4种材料对餐饮废水中氮磷的吸附效果。结果表明:4种材料对氮、磷的吸附符合准二级动力学模型,且用Freundlich等温线比Langmuir等温线更适合描述其吸附过程,4种材料对氨氮的吸附量由强到弱依次为绿沸石>海泡石>陶粒>黑火山石,其中绿沸石除氨氮能力最好,去除率达86.35%;4种材料对磷的吸附量由强到弱依次为黑火山石>海泡石>陶粒>绿沸石,其中黑火山石的除磷能力最好,去除率为64.45%。研究结果能为矿物基吸附材料在餐饮废水处理中的应用提供科学依据。

In view of the fact that a large amount of restaurant wastewater is discharged disorderly,which leads to water eutrophication and other problems.Ceramsite,black volcanic stone,green zeolite and sepiolite were selected as the research objects.The adsorption characteristics of the four materials were studied by using quasi first/second order kinetic model and Langmuir/Freundlich isothermal adsorption method,and the adsorption effects of the four materials on nitrogen and phosphorus in restaurant wastewater were compared and analyzed.The results shown that the adsorption of nitrogen and phosphorus on the four materials conformed to the pseudo second order kinetic model,and the Freundlich isotherm was more suitable to describe the adsorption process than the Langmuir isotherm.The adsorption capacity of the four materials for ammonia nitrogen from strong to weak was in the order of green zeolite>sepiolite>ceramsite>black volcanic rock,in which green zeolite had the best ability to remove ammonia nitrogen,with a removal rate of 86.35%.The adsorption capacity of the four materials for phosphorus from strong to weak was in the order of black volcanic rock>sepiolite>ceramsite>Green zeolite,in which black volcanic rock had the best ability to remove phosphorus,with a removal rate of 64.45%.The results can provide a scientific basis for the application of mineral based adsorption materials in restaurant wastewater treatment.