Chemistry Department, Aswan Faculty of Science, Aswan 81528, Egypt.
Chem Biodivers. 2010 Apr;7(4):878-86. doi: 10.1002/cbdv.200900205.
The adsorption potential of the blast furnace slag of a ferrosilicon firm in Aswan Governorate, Egypt, to decolorize aqueous solutions of 3-methyl-1-phenylpyrazol-5-one 4[2] merocyanine dye (1) was investigated at room temperature. The influence of the solution pH, the quantity of adsorbent, the initial concentration of 1, and the applied contact time were studied with the batch technique. The maximum percentage of removal of 1 was observed at pH 4. The adsorption data were better fitted by the Freundlich than by the Langmuir adsorption isotherm model, confirming the formation of monolayers of 1 on the adsorbent surface. Kinetic rate constants and the transient behavior at different initial concentrations of 1 were determined with both the Lagergren pseudo-first-order and the Ho and McKay pseudo-second-order kinetic models. The calculated kinetic parameters revealed that the adsorption of 1 on blast furnace slag followed a second-order chemisorption process.
埃及阿斯旺省一家硅铁厂的高炉渣对 3-甲基-1-苯基吡唑-5-酮 4[2]甲川菁染料（1）水溶液的室温吸附性能进行了研究。采用批量技术研究了溶液 pH 值、吸附剂用量、1 的初始浓度和施加的接触时间的影响。在 pH 值为 4 时，观察到 1 的去除率最大。吸附数据更符合 Freundlich 吸附等温线模型，而不是 Langmuir 吸附等温线模型，这证实了 1 在吸附剂表面形成单层。通过 Lagergren 拟一级和 Ho 和 McKay 拟二级动力学模型确定了不同 1 初始浓度下的动力学速率常数和瞬态行为。计算出的动力学参数表明，1 在高炉渣上的吸附遵循二级化学吸附过程。
