Adsorption of Pb(II) from Aqueous Solutions by Fast-Growing Eucalyptus Leaves
Batch experiments were investigated using different dosages of fast-growing Eucalyptus leaves (FELs), initial Pb(Ⅱ) concentrations, initial pH values of solution, different temperatures and contacting time. The results showed that the equilibrium adsorption capacity plotting for initial Pb(Ⅱ) concentration appeared a good linear result and the related coefficient (R2) was up to 0.9999. The Freundlich isotherm model described the experimental data better than the Langmuir isotherm model. The results were fitted very well with pseudo second order kinetics and the correlation coefficients (R2) were higher than 0.998 at three different temperature. The pseudo first order kinetics also deciphered the adsorption process well. The negative change in free energy (△G0) and positive change in enthalpy (△H0) indicated that the adsorption was a spontaneous and endothermic process. In addition, small value of △H0 showed that the absorption was a physical process, but values of kinetics denoted that chemical adsorption was also involved.
Qiu-yan YAO Yan-kui TANG Han-bing ZHANG Wen LIU
College of Environment, Guangxi University, Nanning, China, 530004
国际会议
The Fifth International Conference on Waste Management and Technology(第五届固体废物管理与技术国际会议)
北京
英文
161-165
2010-11-01（万方平台首次上网日期，不代表论文的发表时间）