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本文比较研究了Ｃｕ（２＋）在草甘磷、毒莠定和杀虫脒等三种农药条件下在Ｃａ－蒙脱石和δ－Ａｌ２Ｏ３上的吸附。草甘磷降低了Ｃｕ（２＋）在Ｃａ－蒙脱石上的吸附。当草甘磷／Ｃｕ（２＋）摩尔比越高时，Ｃｕ（２＋）吸附的降低量则越大。草甘磷是通过络合机制而降低Ｃｕ（２＋）在Ｃａ－蒙脱石上的吸附，同时增加了Ｃｕ（２＋）在δ－Ａｌ２Ｏ３上的吸附。当草甘磷／Ｃｕ（２＋）摩尔比越高时，Ｃｕ（２＋）吸附的增加量也就越大。草甘磷作为桥而连接δ－Ａｌ２Ｏ３和Ｃｕ（２＋）。毒莠定亦通过络合作用略微降低了Ｃｕ（２＋）在Ｃａ－蒙脱石上的吸附，但它对ＣＵ（２＋）在δ－Ａｌ２Ｏ３的吸附无明显影响。杀虫脒通过对阳离子吸附点位的竞争而降低了Ｃｕ（２＋）在Ｃａ－蒙脱石上的吸附，但不影响Ｃｕ（２＋）在δ－Ａｌ２Ｏ３上的吸附。
In this paper, the adsorption of Cu (2+) onto Ca-montmorillonite and δ-Al2O3 under the conditions of glyphosate, picloram and chlordimeform was studied comparatively. Glyphosate reduces the adsorption of Cu (2+) on Ca-montmorillonite. When the glyphosate / Cu (2+) molar ratio is higher, the decrease of Cu (2+) adsorption is larger. Glyphosate reduces the adsorption of Cu (2+) on Ca-montmorillonite by the complexation mechanism and increases the adsorption of Cu (2+) on δ-Al2O3. When the glyphosate / Cu (2+) molar ratio is higher, the increase of Cu (2+) adsorption is also larger. Glyphosate acts as a bridge connecting delta-Al2O3 and Cu (2+). Picloram also slightly decreased Cu (2+) adsorption on Ca-montmorillonite by complexation, but it had no obvious effect on the adsorption of Cu (2+) on δ-Al2O3. Chlordimeform reduced the adsorption of Cu (2+) on Ca-montmorillonite by competing for cation adsorption sites, but did not affect the adsorption of Cu (2+) on δ-Al2O3.