Departament d'Enginyeria Química, ETSEIB, Universitat Politècnica de Catalunya, 08028 Barcelona, Spain.
J Hazard Mater. 2010 Feb 15;174(1-3):144-50. doi: 10.1016/j.jhazmat.2009.09.028. Epub 2009 Sep 12.
Grape stalk wastes generated in the wine production process were used for the removal of nickel (II) from aqueous solution. The experimental breakthrough curves were obtained in fixed-bed columns. Experiments we carry out in order to evaluate the influence of inlet metal concentration (30 and 70 mg L(-1)) and the regeneration process in a double sorption cycle. The CXTFIT code was used to fit the experimental data and to determine the transport and sorption parameters of the convective-dispersive equation (CDE) and the two-site deterministic non-equilibrium (TSM/CDE) model by adjusting the models to the experimental breakthrough curves (BTC). The results showed that bed capacity as well as transport and sorption parameters were affected by the initial metal concentration, at the highest Ni(II) concentration the grape stalks column saturated quickly leading to earlier breakthrough. The sorption capacity of the sorbent was slightly reduced in a double sorption cycle, while the recovery of the metal in the desorption step was ranging between 80% and 85% in both cycles.
酿酒过程中产生的葡萄茎废料被用于从水溶液中去除镍（II）。在固定床柱中获得了实验突破曲线。我们进行实验以评估入口金属浓度（30 和 70 mg L（-1））和双吸附循环中的再生过程的影响。使用 CXTFIT 代码拟合实验数据，并通过调整模型来确定对流弥散方程（CDE）和双位点确定性非平衡（TSM/CDE）模型的传输和吸附参数到实验突破曲线（BTC）。结果表明，床容量以及传输和吸附参数受初始金属浓度的影响，在最高 Ni（II）浓度下，葡萄茎柱很快饱和，导致较早的突破。在双吸附循环中，吸附剂的吸附容量略有降低，而在两个循环中，解吸步骤中金属的回收率在 80%到 85%之间。
