Adsorption studies of Dichloromethane on some commercially available GACs: Effect of kinetics, thermodynamics and competitive ions

被引：73

作者：

Khan, Moonis Ali ^{[1
]}

Kim, Seong-wook ^{[1
]}

Rao, Rifaqat Ali Khan ^{[2
]}

Abou-Shanab, R. A. I. ^{[1
,3
]}

Bhatnagar, Amit ^{[1
]}

Song, Hocheol ^{[4
]}

Jeon, Byong-Hun ^{[1
]}

机构：

[1] Yonsei Univ, Dept Environm Engn, Wonju 220710, Gangwon Do, South Korea

[2] Aligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Aligarh 202002, Uttar Pradesh, India

[3] Mubarak City Sci Res, Dept Environm Biotechnol, Alexandria, Egypt

[4] KIGAM, Geol Environm Div, Taejon 305350, South Korea

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 178卷 / 1-3期

关键词：

Dichloromethane; Granular activated carbons; Thermodynamics; Kinetics; Point of zero charge; VOLATILE ORGANIC-COMPOUNDS; ACTIVATED CARBONS; WASTE-WATER; METAL-IONS; ORGANOCHLORINE COMPOUNDS; FUNCTIONAL-GROUPS; AQUEOUS-SOLUTION; REMOVAL; BIOSORPTION; ADSORBENT;

D O I：

10.1016/j.jhazmat.2010.02.032

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The objective of this work was to compare the effectiveness of four commercially available granular activated carbons (GACs); coconut (CGAC), wood (WGAC), lignite (LGAC) and bituminous (BGAC) for the removal of dichloromethane (DCM) from aqueous solution by batch process. Various parameters such as thermodynamics, kinetics, pH, concentration of adsorbate, dosages of adsorbent and competitive ions effect on DCM adsorption were investigated. Maximum adsorption capacity (45.5 mg/g for CGAC) was observed at pH 6.0-8.0. The kinetics data indicate better applicability of pseudo-second-order kinetics model at 25 and 35 degrees C. Freundlich model was better obeyed on CGAC, WGAC, and BGAC, while LGAC followed Langmuir model. The adsorption process for 100 mg/L initial DCM concentration on CGAC was exothermic in nature. The adsorption of DCM on various adsorbents involves physical adsorption process. The adsorption of DCM over a large range of initial concentration on CGAC and LGAC is effective even in presence of ionic salts. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：963 / 972

页数：10

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