粉煤灰人工湿地基质对磷吸附性能的研究  

Study on Phosphorus Adsorption Performance Using Fly Ash as a Constructed Wetland Substrate

作　　者：高耀文[1] 段宁[1] 吴克明[1] 

机构地区：[1]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,武汉430081

出　　处：《工业安全与环保》2012年第12期3-6,共4页Industrial Safety and Environmental Protection

基　　金：湖北省教育厅重点项目(D20101107)

摘　　要：本文研究了粉煤灰作为人工湿地基质对磷的吸附动力学行为及吸附性能,并与高炉渣基质的吸附性能进行了比较。结果表明:粉煤灰具有比高炉渣更快的吸附速率及更大的吸附量,在初始磷质量浓度为10mg/L时,修正的Elovich方程在描述粉煤灰吸附动力学实验结果上显示出优越性,而Freundlich方程能更准确地拟合两种基质的等温吸附过程,并且两种基质对pH与干扰离子影响的响应均表现出相似的变化规律。因此,可以考虑用粉煤灰代替高炉渣作为人工湿地除磷基质。In this paper, the phosphorus kinetic behavior and performance of fly ash as a substrate are studied and it is compared with that of blast furnace slag. The adsorption experiments shows that the adsorption rate or capacity of fly ash is higher than that of blast furnace slag. When initial phosphorus concentration is 10 mg/L, the modified Elovich Equation de- scribes the adsorption data better and the Freundlich Equation can provide more accurate fittings. The results reveal that the responses of the two substrates to pH and ion interference are almost identical. So fly ash can be considered to substitute blast furnace sla~ in phosphorus adsorption of constructed wetlands.

关 键 词：粉煤灰 吸附除磷 人工湿地 吸附动力学 吸附等温线 

分 类 号：X703[环境科学与工程—环境工程]