摘要
为确定高炉渣作为垂直潜流人工湿地基质的可行性,通过静态吸附试验和高炉渣去除生活污水中的磷素试验。得出高炉渣对污水中磷的吸附平衡时间相对较短,吸附速率相对较快;当温度下降时,高炉渣的磷吸附容量对吸附平衡浓度依赖性随温度的降低而降低,最大理论吸附量升高了6.34%;在处理0.5 m3/(m2·d)的生活污水中,高炉渣对TP的平均去除率只有40%,吸附方式包含物理吸附和化学吸附;同时得出高炉渣最大磷素解析量分别占最大吸附量的0.68%,因而在实际人工湿地应用中应注意磷素解析而形成的二次污染。
In order to analysis the removal efficiency of phosphorus from wastewater by using BF slag as the substrate materials of vertical-flow constructed wetland systems, in this study the phosphorus adsorption time ,velocity,capacities and mode are examined. The adsorption experiments under static state show BF slag have short phosphorus adsorption time and quick phosphorus adsorption velocity. Following the decreasing of temperature, the maximal theoretical adsorption capacities and the relatively degree of the phos phorus adsorption balance concentration for its adsorption capacities also decrease. On the condition of 0.5 m3/（m2·d）, BF slag can remove 40 percent phosphorus from actual demotic wastewater. The adsorption method includes physical adsorption and chemical ad- sorption. In addition, the ratio of desorption and adsorption of phosphorus in BF slag is 0.68 percent. It is necessary to control the risk of pollution of phosphorus desorption from BF slag as the substrate materials of vertical-flow constructed wetland systems.
出处
《净水技术》
CAS
2014年第A02期19-22,共4页
Water Purification Technology
基金
上海市自然科学基金项目(11ZR1430800)
关键词
高炉渣
人工湿地
磷素
基质
吸附
blast furnace slag constructed wetland system phosphorus substrate adsorption
