摘要
[目的]筛选地下渗滤系统的基质材料。[方法]以河砂、钢渣、粉煤灰、煤渣为研究对象,考察其作为地下渗滤系统基质对磷的吸附特性。[结果]这4种基质中,从基质对磷的理论饱和吸附量看,钢渣对磷的理论饱和吸附量最大,其次是粉煤灰、煤渣和河砂;从基质的解吸试验可知,钢渣的解析率非常小,粉煤灰的解析率稍大,其次是煤渣和河砂;由准二级动力学方程计算出最大除磷速率Vmax依次为:钢渣>煤渣>河砂>粉煤灰;从基质的价格和取材情况看,河砂、粉煤灰、钢渣、煤渣均属于价廉易得的材料,相比而言,河砂比较易于大量获得,且对磷的去除率也在60%左右,故可以作为地下渗滤系统的主要介质。[结论]为地下渗滤系统选择合适的基质材料提供理论依据。
[ Objective ] The study aime to screen the medium of the subsurface filtration system. [ Method ] With the river sand, steel slag, fly coal ash and and coal cinder as the research object, their adsorption properties to the phosphorus were investigated when they were taken as the matrix of the infiltration filter system. [ Result] Among the 4 kinds of matrix, as for the matrix to the theoretical saturated adsorption ca-pacity of phosphorus, the steel slag had biggest theoretical saturated adsorption quantity of phosphorus, followed by fly coal ash, coal cinder and river sand ; it was kown from the desorption test that the desorption rate of the steel slag was very samll, that of the fly coal ash was slightly great, followed by the coal cinders and river sand; the largest phosphorus removal rate counted by the pseudosecond order kinetic equation were in order of steel slag 〉 coal cinder 〉 river sand 〉 fly coal ash; as for the price and material-taking of the matrix, the river sand, fly coal ash, steel slag and coal cinder all belonged to the cheap materials, compared with them, the river sand could be eazy to get a lot and its phosphorus removal rate was also aobut 60% , so it could be taken as the main matrix of the subsurface filtration system. [ Conclusion] The study provided the theoretical basis for screening the suatable matixex for the subsurface filtration system.
出处
《安徽农业科学》
CAS
2012年第9期5446-5447,5458,共3页
Journal of Anhui Agricultural Sciences
关键词
地下渗滤系统
渗滤介质
吸附特性
筛选
Subsurface in filtration system
Fihed medium
Adsorption characteristic
Screening
