Li Chengxian, Huang Zhe, Huang Bicheng, Liu Changfeng, Li Chengming, Huang Yaqin
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing 100029, China E-mail:
Water Sci Technol. 2014;70(6):1019-24. doi: 10.2166/wst.2014.311.
Cr(VI) adsorption in a binary mixture Cr(VI)-Ni(II) using the hierarchical porous carbon prepared from pig bone (HPC) was investigated. The various factors affecting adsorption of Cr(VI) ions from aqueous solutions such as initial concentration, pH, temperature and contact time were analyzed. The results showed excellent efficiency of Cr(VI) adsorption by HPC. The kinetics and isotherms for Cr(VI) adsorption from a binary mixture Cr(VI)-Ni(II) by HPC were studied. The adsorption equilibrium described by the Langmuir isotherm model is better than that described by the Freundlich isotherm model for the binary mixture in this study. The maximum adsorption capacity was reliably found to be as high as 192.68 mg/g in the binary mixture at pH 2. On fitting the experimental data to both pseudo-first- and second-order equations, the regression analysis of the second-order equation gave a better R² value.
研究了使用猪骨制备的分级多孔碳（HPC）对二元混合物中Cr(VI)-Ni(II)体系中Cr(VI)的吸附情况。分析了诸如初始浓度、pH值、温度和接触时间等影响水溶液中Cr(VI)离子吸附的各种因素。结果表明HPC对Cr(VI)具有优异的吸附效率。研究了HPC对二元混合物Cr(VI)-Ni(II)中Cr(VI)的吸附动力学和等温线。在本研究中，对于二元混合物，由朗缪尔等温线模型描述的吸附平衡比由弗伦德利希等温线模型描述的更好。在pH为2的二元混合物中，可靠地发现最大吸附容量高达192.68 mg/g。将实验数据拟合到伪一级和二级方程时，二级方程的回归分析给出了更好的R²值。
