Influence of organic matter removal on competitive and noncompetitive adsorption of copper and zinc in acid soils

被引：73

作者：

Perez-Novo, C. ^{[1
]}

Pateiro-Moure, M. ^{[1
]}

Osorio, E. ^{[1
]}

Novoa-Munoz, J. C. ^{[1
]}

Lopez-Periago, E. ^{[1
]}

Arias-Estevez, M. ^{[1
]}

机构：

[1] Univ Vigo, Fac Ciencias, Area Edafoloxia Quim Agr, Dept Biol Vexetal & Ciencia Solo, Orense 32004, Spain

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2008年 / 322卷 / 01期

关键词：

copper; zinc; noncompetitive adsorption; competitive adsorption; organic matter; desorption;

D O I：

10.1016/j.jcis.2008.03.002

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 [物理化学]; 081704 [应用化学];

摘要：

We studied competitive and noncompetitive adsorption of copper and zinc in four acid soils, and compared the behavior of the two metals in untreated samples and samples treated with hydrogen peroxide to remove organic matter in the soil. Copper exhibited stronger competitive adsorption than zinc in the untreated samples. However, removal of organic matter reduced copper adsorption to a greater extent than zinc adsorption, the two metals exhibiting a more similar adsorption pattern than the untreated samples. The presence of copper dramatically reduced zinc competitive adsorption in untreated samples; on the other hand, that of zinc only resulted in slightly reduced competitive adsorption of copper. The hydrogen peroxide treatment decreased competitive adsorption in both metals; however, copper continued to be more efficient than zinc in competing for binding sites on adsorbing surfaces. Desorption of Cu occurred much less readily than desorption of Zn and hysteresis is apparent especially for Cu. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：33 / 40

页数：8

共 25 条

[1]

Competitive adsorption of copper and zinc by a Bt horizon of a savanna Alfisol as affected by pH and selective removal of hydrous oxides and organic matter [J].