【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。更多还原

【Abstract】 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 model. 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( K f and n) and the equilibrium solution pH increased with increasing concentration of atrazine. The soil zeta potential had not an obvious change and the decrease of DOM occurred. The presence of atrazine significantly increased copper adsorption.更多还原