沙质滩涂颗粒物对磷酸盐的吸附过程研究  

Adsorption Characteristics of Phosphate on the Sandy Tidal

作　　者：张敏波[1] 邵慧君[1] 刘丹[1] 黄辉[1] 

机构地区：[1]宁波工程学院,浙江宁波315016

出　　处：《广州化工》2014年第3期31-33,共3页GuangZhou Chemical Industry

基　　金：宁波市教育科学规划研究课题(YGH032);王伟明助创基金项目(2013005)

摘　　要：以沙质滩涂颗粒物对磷酸盐的吸附过程为对象,通过拟一级和拟二级方程进行吸附动力学研究,采用Langmuir和Freundlich方程描述平衡吸附等温线,并计算得到吸附热力学参数。结果表明:拟二级动力学模型能够较好拟合吸附过程,Langmuir模型能更好的描述吸附等温线,吸附是焓推动作用、自发且放热的过程。The adsorption of phosphate on sandy beach particles was studied. Adsorption kinetics were evaluated by pseudo - first and pseudo - second order model, adsorption isotherms were fitted by Langmuir and Freundlich model, and thermodynamics parameters were calculated. The results showed that the adsorption kinetics was identical with pseudo - second order equation, Langmuir model fitted better with adsorption isotherms, and the negative values of thermodynamic parameters indicated a spontaneous, exothermic and enthalpy promoting process.

关 键 词：磷酸盐 吸附 动力学 热力学 

分 类 号：O647.31[理学—物理化学]