Comparative study on adsorption of cationic and anionic dyes by smectite rich natural clays

被引：133

作者：

Chaari, Islem ^{[1
]}

Fakhfakh, Emna ^{[2
]}

Medhioub, Mounir ^{[3
]}

Jamoussi, Fakher ^{[2
]}

机构：

[1] Natl Ctr Res Mat Sci, Useful Mat Valorizat Lab, Soliman, Tunisia

[2] Natl Ctr Water Res & Technol, Hammamet, Tunisia

[3] Fac Sci, Sfax, Tunisia

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2019年 / 1179卷

关键词：

Smectite; Anionic dye; Cationic dye; Characterization; Adsorption; AQUEOUS-SOLUTION; METHYLENE-BLUE; CONGO RED; REMOVAL; EQUILIBRIUM; KINETICS; VIOLET; ACID;

D O I：

10.1016/j.molstruc.2018.11.039

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：

The smectite rich natural clays of upper Cretaceous of Jebel Romana (South of Tunisia) and Lower Oligocene of Khledia area (Norh of Tunisia) were evaluated as adsorbents for anionic (Acid Brown 75) and cationic (Basic Yellow 28) dyes. XRD, XRF, FTIR, S-BET, CEC and pH(PZC) were used to study the physico-chemical properties of clay samples. The experimental results showed that, the adsorption was pH dependent with a high adsorption capacity of BY28 in basic range and high adsorption of AB75 in acidic range. The maximum adsorption capacities, predicted by the Langmuir model, were 76.92 and 8.33 mg/g for BY28 and AB75, respectively. Smectitic clays showed to be an advantageous adsorbents in terms of price and availability, they use without purification or chemical modifications, which is beneficial for the economy of the treatment. (C) 2018 Published by Elsevier B.V.

引用

页码：672 / 677

页数：6

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