几种土壤对铜吸持(附)特性的研究  

Retention(adsorption)characteristics of copper in several types of soils

作　　者：赵天一[1] 黎成厚[1] 杨斌[1] 

机构地区：[1]贵州大学生命科学学院,贵州贵阳550025

出　　处：《山地农业生物学报》2006年第3期203-207,共5页Journal of Mountain Agriculture and Biology

摘　　要：采用等温吸附平衡法研究了几种土壤对Cu^2＋的吸持（附）特性。结果表明，土壤对Cu^2＋的吸持量、净吸持量、解吸量都随铜标准液浓度的增大而增大，在相同浓度的Cu^2＋标准液中，酸性的硅铝质黄壤、棕壤的净吸持量约是强酸性的第四纪红色黏土、黄壤的250％，碱性的菜国土、石灰土的净吸持量约是第四纪红色黏土、黄壤的300％-650％；结合使用等温吸持曲线与解吸率，能够很好地描述土壤对Cu^2＋的吸持（附）特性；土壤对Cu^2＋的吸持可用Langmuir模型、Freundlich模型及Temkin模型加以描述；最大吸持量与pH值、有机质含量呈极显著相关，与非晶质铁含量呈显著相关。Retention （adsorption） characteristics of copper in several soils were studiod by the method of isothermal adsorption. The results showed that net retaining（adsorbing） capacity, retaining （adsorbing） capacity,desorbing capacity increased with the increase of Cu^2＋ concentration. The desorbing capacity is in an order as follows, Quaternary period red clay 〉 yellow soil 〉 siallitic yellow soil 〉 brymisolic soil 〉 vegetable soil 〉 calcareous soil. The order of the net retaining （adsorbing） capacity is the same as the retaining （adsorbing） capacity which is calcareous soil 〉 vegetable soil 〉 brumisolic soil 〉 siallitic yellow soil 〉 yellow soil 〉 Quaternary period red clay. The retention （adsorption） characteristics could be described by retention （adsorption） isotherm and desorpfion rate. The isotherm curves might be expressed by Langmuir, Freundlich and Temkin equations. The maximum copper retaining （adsorbing） capacity extremely significant correlated with the pH value and the contents of organic matters, and significant correlated with the contents of activity iron.

关 键 词：铜 吸持特性 土壤污染 等温吸附平衡法 

分 类 号：X131.3[环境科学与工程—环境科学]