吸附
吸附
去壳
磷酸
弗伦德利希方程
朗缪尔
朗缪尔吸附模型
单层
核化学
化学
热力学
有机化学
物理
植物
生物化学
生物
出处
期刊:IOSR journal of applied chemistry
[IOSR Journals]
日期:2012-01-01
卷期号:3 (1): 38-45
被引量:1553
摘要
Equlibrium sorption of the phosphoric acid modified rice husk was studied.The Physico-chemical properties of the modified rice husk were determined.The equilibrium sorption data were fitted into Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DRK) isotherms.Of the four adsorption isotherm, the R 2 value of Langmuir isotherm model was the highest.The maximum monolayer coverage (Q o ) from Langmuir isotherm model was determined to be 101.01mg/g, the separation factor indicating a favourable sorption experiment is 0.133.Also from Freundlich Isotherm model, the sorption intensity (n) which indicates favourable sorption and the correlation value are 1.6 and 0,89 respectively.The heat of sorption process was estimated from Temkin Isotherm model to be 25.34J/mol and the mean free energy was estimated from DRK isotherm model to be 0.7KJ/mol which vividly proved that the adsorption experiment followed a physical process.
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