粉煤灰对工业废水中氨氮的吸附性能研究  

Ammonia Nitrogen Adsorption on Coal Fly Ash

作　　者：郑越[1] 刘方[1] 吴永贵[1] 

机构地区：[1]贵州大学资源与环境工程学院,贵州贵阳550003

出　　处：《环境科学与技术》2011年第1期4-7,16,共5页Environmental Science & Technology

基　　金：973计划前期研究专项(2008CB417209)

摘　　要：以粉煤灰作为吸附材料进行静态吸附试验,研究粉煤灰对废水中氨氮的吸附性能及其吸附动力学行为,并与活性炭的吸附性能进行比较。试验结果表明:粉煤灰对氨氮的吸附容量随着水中NH4+-N浓度的增加而增大,氨氮浓度在200 mg/L和500 mg/L下,粉煤灰对NH4+-N吸附动力学行为遵循Bangharm方程和Elovich方程。对于实际氨氮工业废水,根据其吸附曲线拟合的关系方程式得出粉煤灰反应930 min时,对废水中NH4+-N吸附容量最大。对于配制的氨氮废水和实际氨氮工业废水,粉煤灰的吸附能力均强于活性炭。Performance and kinetic behavior of adsorption of NH3 in wastewater on fly ash from a coal-fired power plant were studied compared with that on activated carbon.The static adsorption experiment showed that both Bangharm and the modified Elovich equations can be used to well describe the kinetic behavior of adsorption,and from the equations it was derived that the maximum adsorption capacity was reached when the reaction lasted for 930min.Meanwhile,the comparative study indicated that adsorption capacity of fly ash was better than activated carbon.

关 键 词：粉煤灰 氨氮 吸附性能 吸附动力学 

分 类 号：X703[环境科学与工程—环境工程]