【摘要】 采用等温吸附平衡法研究了几种土壤对Cu2+的吸持(附)特性。结果表明,土壤对Cu2+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Cu2+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%,碱性的菜园土、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Cu2+的吸持(附)特性;土壤对Cu2+的吸持可用Langmu ir模型、Freund lich模型及Temk in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。更多还原

【Abstract】 Retention（adsorption） characteristics of copper in several soils were studied by the method of isothermal（adsorption.）The results showed that net retaining（adsorbing） capacity,retaining（adsorbing） capacity,desorbing capacity increased with the increase of Cu²⁺concentration.The desorbing capacity is in an order as follows,Quaternary period red clay>yellow soil>siallitic yellow soil>brunisolic 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>brunisolic soil>siallitic yellow soil>yellow soil>Quaternary period red clay.The retention（adsorption） characteristics could be described by retention（adsorption） isotherm and desorption 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.更多还原