Removal of Methylene Blue from aqueous solutions by adsorption on Kaolin: Kinetic and equilibrium studies

被引：574

作者：

Mouni, Lotfi ^{[1
]}

Belkhiri, Lazhar ^{[2
]}

Bollinger, Jean-Claude ^{[3
]}

Bouzaza, Abdelkrim ^{[4
]}

Assadi, Aymen ^{[4
]}

Tirri, Amar ^{[2
]}

Dahmoune, Farid ^{[5
]}

Madani, Khodir ^{[5
]}

Remini, Houcine ^{[5
]}

机构：

[1] Univ Akli Mohand Oulhadj, Fac SNVST, Lab Gest & Valorisat Ressources Nat & Assurance Q, Bouira 10000, Algeria

[2] Univ Batna, Dept Hydraul, Batna 05000, Algeria

[3] Univ Limoges, GRESE, 123 Ave Albert Thomas, F-87060 Limoges, France

[4] ENSCR, UMR CNRS 6226, Equipe Chim & Ingn Proc, Lab Sci Chim Rennes, Ave Gen Leclerc, F-35700 Rennes, France

[5] Univ Bejaia, Res Lab Biomath Biochem Biophys & Scientometr, Bejaia 06000, Algeria

来源：

APPLIED CLAY SCIENCE | 2018年 / 153卷

关键词：

Kaolin; Adsorption; Methylene Blue; Kinetics; LOW-COST ADSORBENTS; DYE REMOVAL; CATIONIC DYES; CLAY-MINERALS; ZERO CHARGE; ISOTHERM; SORPTION; PORE; MODELS; POINT;

D O I：

10.1016/j.clay.2017.11.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Removal of Methylene Blue (MB) from aqueous solutions is studied using a raw Algerian kaolin sample as a low-cost adsorbent. The effects of pH, contact time, dye concentration and temperature are all taken into consideration. The adsorption kinetics results are adjusted to best fit the pseudo -second order model. The experimental data are analyzed by Langmuir isotherms, revealing that the maximum adsorption capacity of MB on this kaolin sample equals 52.76 mg/g at T = 25 degrees C and pH = 6.0. The calculated thermodynamic data demonstrates that adsorption is spontaneous and enhanced at higher temperatures. Desorption studies with water indicate that the adsorbent could successfully retain MB, even after four cycles. From these results, it can be considered that the raw Algerian kaolin sample tested herein is effective in the removal of MB from aqueous solutions and moreover may be used as an alternative to high-cost commercial adsorbents.

引用

页码：38 / 45

页数：8

共 53 条

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