Sorption-desorption of trinitrotoluene in soils: Effect of saturating metal cations

被引：6
|
作者：
Singh, Neera [1 ]
Hennecke, Dieter [2 ]
Hoerner, Jennifer [2 ]
Koerdel, Werner [2 ]
Schaeffer, Andreas [3 ]
机构：
[1] Indian Agr Res Inst, Div Agr Chem, New Delhi 110012, India
[2] Fraunhofer Inst Mol Biol & Appl Ecol, D-57392 Schmallenberg, Germany
[3] RWTH Univ, D-52056 Aachen, Germany
来源：
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2008年 / 80卷 / 05期
关键词：
trinitrotoluene; exchangeable cations; sorption; desorption;
D O I：
10.1007/s00128-008-9455-0
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Clay minerals in soils control the sorption and mobility of nitroaromatics in munitions contaminated soils. Therefore, effect of exchangeable cations (NH4+, K+, Ca2+, and Al3+) on sorption-desorption of trinitrotoluene (TNT) was studied in two reference soils viz sandy loam and silty clay. Compared to control soils, K+ ion saturation significantly increased TNT sorption in both the soils, while other cations decreased TNT sorption. Effect of K+ saturation on sorption of TNT was more pronounced in organic matter poor sandy loam soil (seven times) then silty clay (two times). Desorption followed the reverse trend and greater amounts of sorbed TNT were retained in the K+ saturated soils.
引用
收藏
页码：443 / 446
页数：4
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