Effect of surface chemistry, solution pH, and ionic strength on the removal of herbicides diuron and amitrole from water by an activated carbon fiber

被引：125

作者：

Fontecha-Camara, M. A.

Lopez-Ramon, M. V.

Alvarez-Merino, M. A.

Moreno-Castilla, C. ^{[1
]}

机构：

[1] Univ Jaen, Fac Ciencias Expt, Dept Quim Inorgan & Organ, Jaen 23071, Spain

[2] Univ Granada, Fac Ciencias, Dept Quim Inorgan, E-18071 Granada, Spain

来源：

LANGMUIR | 2007年 / 23卷 / 03期

关键词：

D O I：

10.1021/la062200f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A study was conducted on the effects of carbon surface chemistry, solution pH, and ionic strength on the removal of diuron and amitrole from aqueous solutions by adsorption on an as-received and oxidized activated carbon fiber. Results obtained were explained by the surface characteristics of the adsorbents and the characteristics of the herbicide molecules. Under the experimental conditions used, diuron uptake was much higher than that of amitrole, despite its larger molecular dimensions, due to the lesser water solubility, greater hydrophobicity, and larger dipolar moment of diuron compared with amitrole. Uptake variations associated with differences in carbon surface oxidation, solution pH, and ionic strength were explained by corresponding changes in electrostatic, hydrophobic, and van der Waals interactions.

引用

页码：1242 / 1247

页数：6

共 27 条

[1] Batch adsorption of 2,4-dichlorophenoxy-acetic acid (2,4-D) from aqueous solution by granular activated carbon [J].