%0 Journal Article
%T Cu adsorption by phaeozem and burazem<br>黑土和棕壤对铜的吸附研究
%A YU Ying
%A ZHOU Qixing
%A WANG Xin
%A REN Liping
%A <br>于颖
%A 周启星
%A 王新
%A 任丽萍
%J 应用生态学报
%D 2003
%I 
%X Studies on the thermodynamics and kinetics of copper (Cu2+) adsorption by phaeozem and burozem showed that that the adsorption of Cu2+ by these two soils was increased with the increasing concentration of Cu2+ within the range of Cu2+ concentrations used in the experiment, but the amount of Cu2+ adsorbed and fixed on phaeozem was much higher than that on burozem. When the test Cu2+ concentration in adsorption equilibrium was 95 mg.kg-1, its adsorption by burozem was nearly 3720 mg.kg-1, whereas by phaeozem was as high as 6076 mg.kg-1. Under the highest CuCl2 treatment of 400 mg.kg-1, Cu2+ adsorbed by phaeozem and burozem was 6159.0 mg.kg-1 and 4736.6 mg.kg-1, respectively. The adsorption of Cu2+ by the test soils could significantly conform to the Freundlich and Temkin equation, while Langmuir equation was not applicable to describe the isothermal adsorption processes of Cu2+ by the two soils. The adsorption of Cu2+ by the test soils was very rapid, which could reach its balance after 15-20 min. The adsorption within the first 2 min at its beginning stage accounted for 90% of the Cu equilibrium adsorption. The adsorptive rate of Cu2+ by phaeozem was decreased more quickly than that by burozem with the time. The two-constant equation was the optimal model to describe the adsorption of Cu2+. The other models in point were first-order dynamic equations and Elovich equations, whereas parabolic diffusion equations were not suitable ones.
%K Cu
%K Phaeozem
%K Burozem
%K Adsorption
%K Thermodynamics
%K Chemical kinetics<br>黑土
%K 棕壤
%K 铜
%K 吸附作用
%K 热力学
%K 化学动力学
%K 土境
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=39802EA6371E50CE&yid=D43C4A19B2EE3C0A&vid=F3583C8E78166B9E&iid=94C357A881DFC066&sid=A67EE05E56DA7F45&eid=849F08713EB6820A&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=19&reference_num=18