摘要
采用表面活性剂对凹土进行改性,研究改性凹土对水中苯并[a]芘的静态吸附热力学和动力学特征。结果表明,改性凹土对炼油废水中苯并[a]芘的吸附为多层吸附、自发进行、放热反应、是物理吸附占主导作用的熵减少过程,遵循吸附分配理论,其吸附过程更符合拟二级动力学模型和Freundlich热力学模型。
This study researched the characteristics of adsorption kinetics and thermodynamics of attapulgite to the benzo[ a] pyrene in water and attapulgite was modified with surface active agent. The resuhs showed that the modified attapulgite adsorption to benzo[ a] pyrene in refinery waste water was multi-layer adsorption with spontaneous and exothermic reaction, and remained entropy decreasing process when physical adsorption occupied the leading function. The adsorption process followed the adsorption distribution theory, and was more correspond with pseudo-second order model and Freundlich thermodynamics model.
出处
《四川环境》
2015年第5期31-35,共5页
Sichuan Environment
关键词
表面活性剂
凹土
苯并[A]芘
动力学
热力学
Surface active agent
attapulgite
Benzo [ a] Pyrene
kinetics
thermodynamics
