Adsorption characteristics of a phenoxy acetic acid herbicide on activated carbon

被引：33

作者：

Belmouden, M ^{[1
]}

Assabbane, A ^{[1
]}

Ichou, YA ^{[1
]}

机构：

[1] Univ Ibnou Zohr, Fac Sci, Chim Phys Lab, Equipe Photocatalyse & Environm, Agadir 80000, Morocco

来源：

JOURNAL OF ENVIRONMENTAL MONITORING | 2000年 / 2卷 / 03期

关键词：

D O I：

10.1039/a909357e

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) by two powdered coal activated carbons was studied in aqueous solution. The modelling of the adsorption equilibrium showed that the adsorption of 2,4-D fitted a Langmuir isotherm. Adsorption was influenced by the activated carbon type, adsorbent concentration and solution characteristics. The adsorption was found to decrease with an increase in pH over the range 1.5-9. Maximum adsorption occurred at pH approximate to 2.5, which corresponds to the 2,4-D pK(a) value. The amount of 2,4-D adsorbed was also found to depend on the NaCl concentration.

引用

页码：257 / 260

页数：4

共 23 条

[1]

ASFOUR HM, 1985, J CHEM TECHNOL BIOT, V35, P2

[2] Adsorption of gases in multimolecular layers [J].

Brunauer, S ;

Emmett, PH ;

Teller, E .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1938, 60 :309-319

[3] ADSORPTION OF NATURAL DISSOLVED ORGANIC-MATTER AT THE OXIDE WATER INTERFACE [J].

DAVIS, JA .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1982, 46 (11) :2381-2393

[4]

DRAOUI K, 1986, P 2 ENG FDN C FUND A, P185

[5]

*ENV FOC, 1993, ENV HLTH PERSP, V101, P578

[6]

*ENV PROT AG, 1980, ENV NEWS

[7]

FABRE B, 1990, Revue des Sciences de l'Eau, V3, P277

[8] Adsorption of humic substances on activated carbon from aqueous solutions and their effect on the removal of Cr(III) ions [J].

Ferro-Garcia, MA ;

Rivera-Utrilla, J ;

Bautista-Toledo, I ;

Moreno-Castilla, C .

LANGMUIR, 1998, 14 (07) :1880-1886

[9]

FOURNIER J, 1988, CULTURE TECHNIQUE, V70, P5

[10] STUDIES IN ADSORPTION .11. A SYSTEM OF CLASSIFICATION OF SOLUTION ADSORPTION ISOTHERMS, AND ITS USE IN DIAGNOSIS OF ADSORPTION MECHANISMS AND IN MEASUREMENT OF SPECIFIC SURFACE AREAS OF SOLIDS [J].

GILES, CH ;

MACEWAN, TH ;

NAKHWA, SN ;

SMITH, D .

JOURNAL OF THE CHEMICAL SOCIETY, 1960, (OCT) :3973-3993

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