Adsorption of Lead onto Folium Camelliae Biomass: Estimation of the Equilibrium, Thermodynamic Parameters and Environmental Meaning
Adsorption of lead ions onto Folium Camelliae was investigated a a function of initial pH, initial lead concentration, contact time and temperature. The nature of the possible biosorbent and metal ion interactions was examined by the FTIR technique. Adsorption equilibrium was observed within 60 min. Adsorption equilibrium data were well described by Langmuir isotherm model. The maximum adsorption capacity was 74.46 mg·g々1 at 313 K and pH 4.5. From the D々R model, the mean free energy was calculated as 11.6~16.0 kJ·mol々1 ranging from 283 K to 313 K, indicating the adsorption was taken place by chemical ion々exchange. Thermodynamic parameters (G0, H0 and ,S0) were also evaluated. These parameters showed that the adsorption process was feasible, spontaneous and endothermic under studied conditions. Desorption experiments indicated that the lead fixed on the biomass was stable in common solutions except acid media. These results announced an excellent adsorption material and also warned us that tea plant must be kept away from lead pollution.
ZHU Chunshui ZHOU Hongying CHEN Wenbin
Jiangsu Marine Resource Development Research Institute, Lianyungang 222001, Jiangsu China School of Jiangsu Marine Resource Development Research Institute, Lianyungang 222001, Jiangsu China
国际会议
2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)
广东东莞
英文
988-993
2011-06-01（万方平台首次上网日期，不代表论文的发表时间）