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用延安子长煤在550℃热解后的半焦为原料,采用化学活化法制得活性焦,并对其进行了N2等温吸附、扫描电子显微镜(SEM)、X射线衍射(XRD)等表征。以苯酚和对硝基苯酚为目标吸附物,以吸附剂添加量、溶液浓度、吸附时间等为考察因素,研究了该活性焦对苯酚和对硝基苯酚模拟含酚废水的吸附性能,探索了该活性焦对苯酚、对硝基苯酚的吸附动力学行为。结果表明,该活性半焦对上述2种酚均具有良好的吸附性能,准二级动力学模型拟合的相关系数均在0.999以上,模型饱和吸附量与实验值相近,能很好地描述了2种酚类在该活性焦上的吸附行为。
The active coke was prepared by chemical activation method using semi-coke from pyrolysis of longan coal at 550 ℃ as raw material. The isothermal adsorption, scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the active coke. Taking phenol and p-nitrophenol as the target adsorbents, taking the adsorbent dosage, solution concentration and adsorption time as the investigation factors, the adsorption performance of phenol and p-nitrophenol on the simulated phenol-containing wastewater was studied. The activity of coke phenol, p-nitrophenol adsorption kinetics behavior. The results showed that the active semi-coke had good adsorption properties on the two phenols mentioned above, and the correlation coefficient of the quasi-second-order kinetic model fitting was above 0.999. The saturated adsorption capacity of the model was close to the experimental value and could well describe Adsorption Behavior of Two Phenols on the Activated Coke.