The removal of phenolic compounds from aqueous solutions by organophilic bentonite

被引：81

作者：

Akçay, M ^{[1
]}

Akçay, G ^{[1
]}

机构：

[1] Dicle Univ, Dept Chem, Fac Sci, TR-21280 Diyarbakir, Turkey

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2004年 / 113卷 / 1-3期

关键词：

phenolic compounds; removal; adsorption; kinetics; organophilic clays; hydrophobicity;

D O I：

10.1016/j.jhazmat.2004.06.026

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption of p-chlorophenol (p-CP) and p-nitrophenol (p-NP) on organophilic bentonite (dodecylammonium bentonite, DDAB) was studied as a function of solution concentration and temperature. The observed adsorption rates were found to be equal to the first-order kinetics. The rate constants were calculated for temperatures ranging between 25.0-35.0 degreesC at constant concentration. The adsorption energies, E and adsorption capacity, (q(m)), for phenolic compounds adsorbed to organophilic bentonite were estimated by using the Dubinin-Radushkevic equation. Thermodynamic parameters from the adsorption isotherms of p-CP and p-NP on organophilic bentonite were determined. These isotherms were modeled according to Freundlich and Dubinin-Radushkevic adsorption isotherms and followed the V-shaped isotherm category with two steps. The amount of adsorption was found to be dependent on the relative energies of adsorbent-adsorbate, adsorbate-solvent and adsorbate-adsorbate interaction. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：189 / 193

页数：5

共 25 条

[1]

Akçay G, 1999, TURK J CHEM, V23, P105

[2]

CHEN JM, 2002, WATER RES, V326, P647

[3] THE MECHANISM OF EXCHANGE REACTIONS OCCURRING BETWEEN SODIUM MONTMORILLONITE AND VARIOUS N-PRIMARY ALIPHATIC AMINE SALTS [J].

COWAN, CT ;

WHITE, D .

TRANSACTIONS OF THE FARADAY SOCIETY, 1958, 54 (05) :691-697

[4]

HARIBABU E, 1993, J ENV STUD, V43, P169

[5] Adsorption of p-nitrophenol on an activated carbon with different oxidations [J].

Haydar, S ;

Ferro-García, MA ;

Rivera-Utrilla, J ;

Joly, JP .

CARBON, 2003, 41 (03) :387-395

[6] Equilibrium adsorption studies of some aromatic pollutants from dilute aqueous solutions on activated carbon at different temperatures [J].

Khan, AR ;

Ataullah, R ;

AlHaddad, A .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1997, 194 (01) :154-165

[7] Adsorption of phenol and chlorinated phenols from aqueous solution by tetramethylammonium- and tetramethylphosphonium-exchanged montmorillonite [J].

Lawrence, MAM ;

Kukkadapu, RK ;

Boyd, SA .

APPLIED CLAY SCIENCE, 1998, 13 (01) :13-20

[8] Adsorption of organic phenols onto dual organic cation montmorillonite from water [J].

Lee, JH ;

Song, DI ;

Jeon, YW .

SEPARATION SCIENCE AND TECHNOLOGY, 1997, 32 (12) :1975-1992

[9] Heavy metal removal from water by sorption using surfactant-modified montmorillonite [J].

Lin, SH ;

Juang, RS .

JOURNAL OF HAZARDOUS MATERIALS, 2002, 92 (03) :315-326

[10]

MACKENZIE RC, 1951, J COLL SCI IMP U TOK, V6, P219

← 1 2 3 →