【摘要】 采用批量平衡法研究了东北地区典型黑土对重金属Cu²⁺的吸附热力学特征,以及离子强度、温度和DOM对黑土吸附Cu²⁺的影响.结果表明:Freundlich模型能够较好地描述一般条件及其不同影响因素下黑土对Cu²⁺的热力学吸附过程（R>0.985,P<0.01）.离子强度的增加抑制了Cu²⁺在黑土上的吸附,不同离子强度作用下黑土对Cu²⁺的吸附能力顺序为:0.001 mol/L>0.01 mol/L>0.1 mol/L.温度的增加促进了Cu²⁺在黑土上的吸附,不同温度作用下黑土对Cu²⁺的吸附能力顺序为:35℃>25℃>15℃.浓度范围在0⁴00 mg/L的DOM能够抑制黑土对Cu²⁺的吸附,且抑制作用随着DOM浓度的增加而增大.Cu²⁺在黑土上的吸附量随着p H值的增加而增加,DOM的抑制作用随着p H值的增加而增大.更多还原

【Abstract】 The batch equilibrium method was employed to study the thermodynamic characteristics of heavy metal Cu²⁺ ,and the effects of the ionic strength,temperatures and the dissolved organic matter（ DOM） on the thermodynamic adsorption of Cu²⁺ onto the black soil in Northeast,China. The results showed that the thermodynamic process of Cu²⁺ adsorption under the general condition and some influencing factors onto black soil can be well described by Freundlich equation（ R > 0. 985,P < 0. 01）. The adsorption of Cu²⁺ was inhibited by the increase of ionic strength,and Cu²⁺ adsorption onto black soil in the presence of different ionic strength followed this order of 0. 00 1mol/L >0. 01 mol/L > 0. 1 mol/L. But the adsorption of Cu²⁺ was enhanced by the increase of temperature,and Cu²⁺ adsorption onto black soil under different temperatures followed the order of 35 ℃ > 25 ℃ > 15 ℃. And the adsorption of Cu²⁺ was inhibited by 0 400 mg/L of DOM,and its inhibition increased with the increase of DOM concentration. Moreover,the adsorption of Cu²⁺ increased with p H increasing,but it was inhibited by DOM,and the inhibition increased with p H increasing.更多还原