Preparation and examination of activated carbons from date pits impregnated with potassium hydroxide for the removal of methylene blue from aqueous solutions

被引：49

作者：

Banat, F ^{[1
]}

Al-Asheh, S ^{[1
]}

Makhadmeh, L ^{[1
]}

机构：

[1] Jordan Univ Sci & Technol, Irbid 22110, Jordan

来源：

ADSORPTION SCIENCE & TECHNOLOGY | 2003年 / 21卷 / 06期

关键词：

D O I：

10.1260/026361703771953613

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The effect of chemical activation on the adsorption capacity of raw date pits towards the basic dye Methylene Blue (MB) was investigated. The raw material was impregnated with 30 wt% KOH solution followed by carbonization at 600degreesC for 2 h and activation with CO2 at 800degreesC for 1 h. The adsorption capacity increased from 80.3 mg/g to 123.1 mg/g upon chemical activation. Three simplified models including the pseudo-first-order, pseudo-second-order and intraparticle diffusion models were used to test the adsorption kinetics. The rates of adsorption were found to conform to pseudo-second-order kinetics with high correlation. The equilibrium results for MB adsorption on the activated carbon obtained from date pits were well fitted by the Langmuir isotherm equation.

引用

页码：597 / 606

页数：10

共 23 条

[1] Adsorption properties of activated carbons prepared from olive stones by chemical and physical activation [J].