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当前位置: 首页 > 文章 > 黑土和黑钙土对Cu~(2+)的吸附作用及影响因素 吉林农业大学学报 2014,36 (4) 447-453
Position: Home > Articles > Cu~(2+) Adsorption of Black Soil and Chernozem and Its Influencing Factors Journal of Jilin Agricultural University 2014,36 (4) 447-453

黑土和黑钙土对Cu~(2+)的吸附作用及影响因素

作  者：
吉凡;王帅;王开爽;王莉;张晋京
单  位：
吉林农业科技学院植物科学学院;吉林农业大学资源与环境学院
关键词：
黑土;黑钙土;铜;吸附量;离子强度
摘  要：
以黑土和黑钙土为供试土壤,采用批量平衡法,研究了pH、离子强度、温度和反应时间对土壤吸附Cu2+的影响。结果表明:随着pH增加,两类土壤对Cu2+的吸附量均增大,pH>7时吸附量达到饱和,黑钙土对Cu2+的吸附量高于黑土;随着反应体系离子强度的增大,两类土壤对Cu2+的吸附率均有所降低,其中在硝酸钠浓度为0~0.2 mol/L时降幅较大;随着温度和溶液中初始Cu2+浓度的升高,两类土壤对Cu2+的吸附量亦有所增加,黑土和黑钙土对Cu2+的吸附等温线分别用Freundlich方程和Langmuir方程描述较为精确,表观热力学参数的计算结果表明两类土壤对Cu2+的吸附均为自发、吸热和熵增加的过程;在描述黑土和黑钙土吸附Cu2+的动力学过程中,Elovich方程和抛物线扩散方程的拟合效果最佳。
译  名：
Cu~(2+) Adsorption of Black Soil and Chernozem and Its Influencing Factors
作  者：
JI Fan;WANG Shuai;WANG Kai-shuang;WANG Li;ZHANG Jin-jing;College of Resources and Environment,Jilin Agricultural University;College of Plant Science,Jilin Agricultural Science and Technology College;
关键词：
black soil;;chernozem;;Cu;;adsorption;;ionic strength
摘  要：
Using black soil and chernozem as tested soil,the effects of pH value,ionic strength,temperature and reaction time on adsorption behaviors of Cu2 +were studied by the batch equilibrium method,which provides basic data for Cu2 +application and pollution prevention on the two types of soil. The results showed that Cu2 +adsorption of the two types of soil increased with the increase of pH. When the pH was higher than 7,their adsorption amount was saturated. The amount of Cu2 +adsorbed by chernozem was higher than that of black soil. However,Cu2 +adsorption decreased with the increase of ionic strength. The absorption ratio decreased significantly in the NaNO3solution with the concentration between 0—0. 2 mol /L. With temperature and initial Cu2 +concentration increasing in the solution,the absorption ratio of Cu2 +increased in both samples. The best way to describe the relationship between absorption ratio and temperature was Freundlich and Langmuir equations.Apparent thermodynamic parameters showed that Cu2 +absorption of the two types of soil was sponta-neous,during which heat was absorbed and entropy was accumulated. For the Cu2 +adsorption kinetics process,Elovich Equation and Parabolic Diffusion Equation were more available to black soil and chernozem analysis.

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