摘要
对三峡水库消落区5种土壤进行了汞的吸附-解吸试验,用不同的等温吸附方程和化学反应动力学方程进行了模拟比较,结果显示,不同土壤对汞的吸附解吸动力学规律相类似,吸附速率和解吸速率均与土壤pH值呈显著(r=0.933,p<0.05)和极显著相关性(r=0.962,p<0.01),但吸附量和解吸量各不相同,其中,紫色潮土对汞的吸附量最大,酸性紫色土最小;灰棕潮土对汞的解吸量最大,黄壤最小,其它类型土壤介于它们之间.
In this paper, the adsorption and desorption characteristics of five kinds of main soils in water level fluctuating zone of the Three Gorges Reservoir to mercury were studied using some isothermal adsorption equations and chemical kinetics equations. Moreover, the influencing factors and possible mechanisms were also discussed. The results indicated that the kinetic characteristics of the adsorption and desorption of different soils to mercury are similar. The rates of adsorption and desorption of mercury are significantly and positively correlated with the pH of soil （ r =0. 933, p 〈0. 05 ; r =0. 962, p 〈0. 01 ）. Purple alluvial soil has maximal adsorption amount and acid purple soil has minimal one, while grey-brown alluvial soil has the maximal desorption amount and yellow soil has minimal one. For other kinds of soil, the adsorption amount is between purple alluvial soil and acid purple soil, while the desorption amount is between grey-brown alluvial soil and yellow soil.
出处
《环境化学》
CAS
CSCD
北大核心
2007年第3期302-306,共5页
Environmental Chemistry
基金
国家自然科学基金(项目编号:405730665)
关键词
土壤
汞
吸附解吸
soil, mercury, adsorption, desorption.
作者简介
通讯作者：dywang@swau．edu．cu
