阿特拉津对土壤吸附铜的影响  

Effects of Atrazine on Adsorption of Copper by Soils

作　　者：张凤杰[1] 欧晓霞[1] 仉春华[1] 乌云娜[1] 董玉瑛[1] 

机构地区：[1]大连民族学院环境与资源学院,辽宁大连116605

出　　处：《大连民族学院学报》2014年第1期14-17,共4页Journal of Dalian Nationalities University

基　　金：中央高校基本科研业务费专项资金资助项目(DC110318);辽宁省教育厅科技研究一般项目(L2013509);大连民族学院人才启动基金资助项目(110050)

摘　　要：采用批量平衡法研究了铜在土壤中的吸附行为,探讨了阿特拉津与铜共存对铜吸附性能的影响。结果表明:铜与阿特拉津共存时,准二级吸附动力学方程可以很好地描述铜的吸附速率,Freundlich吸附等温线方程比较理想地描述了铜的吸附行为(R2>0.99);随着阿特拉津浓度的增加,土壤溶液中溶解性有机碳的含量下降,K f和n增大,土壤表面电位变化不明显,土壤溶液pH值显著升高。阿特拉津与铜共存增强了土壤对铜的吸附能力。Batch equilibrium adsorption was conducted to study the adsorption of copper in the black soil and the effect of atrazine on adsorption of copper by the soil was probed. The results showed the pseudo -second order equation was considered as the most appropriate kinetic mod- el. All of the adsorption isotherms of copper in the absence and presence of atrazine could be described by Freundlich equation （R2 〉 0.99）. the adsorption coefficients （Kf and n） and the equilibrium solution pH increased with increasing concentration of atrazine. The soil zeta poten- tial had not an obvious change and the decrease of DOM occurred. The presence of atrazine sig- nificantly increased copper adsorption.

关 键 词：铜 阿特拉津 土壤 吸附 

分 类 号：X592[环境科学与工程—环境工程]