摘要
测定了在不同pH值下人工改型所得钙型斜发沸石对NH4+的全交换容量、对NH4+的等温交换平衡曲线,进一步研究了其部分热力学特性。结果表明,钙型斜发沸石对NH4+交换总量随pH值的升高而降低,在pH值为7时为79.321mmol/100g,该离子交换过程可自发进行,且其选择性随温度的升高而降低。研究成果可为沸石法处理含氨氮废水的进一步研究提供一定的理论依据。
The capacity of ion exchange on Ca2+zeolite, the isotherm of ion exchange equilibrium and some thermodynamic properties are studied. The results showed that the whole exchange capacity of NH4+ on zeolite decreases with raising the pH value and is 79.321mmol/100g at pH=7. This process takes place spontaneously along positive direction, and its selectivity would be decreased with enhancing the temperature. Those results can afford the theoretical foundation for development of the treatment technology by zeolite for wastewater including NH3-N.
出处
《城市环境与城市生态》
CAS
CSSCI
CSCD
北大核心
2003年第5期62-64,共3页
Urban Environment & Urban Ecology
基金
河北省科技攻关项目(01276719D)
