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采用自制的负载铈-锰双金属型活性炭( Ce-Mn/AC)吸附兰炭废水,通过静态吸附平衡实验研究pH值及Ce-Mn/AC投加量对兰炭废水化学需氧量( COD)去除率的影响；通过吸附动力学、吸附等温线及吸附热力学模型方程拟合兰炭废水在Ce-Mn/AC的吸附过程,考察其吸附特性,并采用气相色谱-质谱联用仪( GC-MS)及紫外光谱仪(UV-vis)分析其可能的吸附机理。结果表明：在Ce-Mn/AC投加量为10 g·L-1,不调节pH值时,Ce-Mn/AC对兰炭废水的吸附量为82.9 mg·L-1,COD去除率为84.6%；吸附动力学符合拟二级动力学模型,Freundlich模型可更好地描述Ce-Mn/AC对兰炭废水的吸附平衡过程,△G<0,△H>0及△S>0,表明兰炭废水在Ce-Mn/AC上的吸附是自发吸热的、以化学吸附为主的过程；兰炭废水中难降解的多环芳烃及含氮杂环有机物先于单环芳烃吸附在Ce-Mn/AC上,因而经此吸附工艺后可很大程度地减小兰炭废水后续工艺中难降解物对废水处理系统的影响,并提供了一定的基础数据及理论,吸附解吸实验表明,Ce-Mn/AC具有较优的重复使用性能。

Semi-coking wastewater was treated by self-made Ce-Mn/AC. The effects of pH and dosage of Ce-Mn/AC on COD removal rate of semi-coking waste water were studied by static examination of equilibrium adsorption. The adsorption properties of semi-coking wastewater on Ce-Mn/AC was investigated by using adsorption kinetics model, adsorption isotherm and adsorption thermodynamics model to fit the adsorption process, and the probable adsorption mechanism was induced by GC-MS and UV-vis analysis. The results show that the semi-coking wastewater adsorption capacity on Ce-Mn/AC was 82. 9 mg·g-1, and the COD removal rate was 84. 6% when under the Ce-Mn/AC dosage was 10 g· L-1 without adjusting the pH value of semi-coking wastewater. The adsorption kinetics fitted pseudo-second-order model, Freundlich model could better describe adsorption of semi-coking waste water by Ce-Mn/AC,△G<0,△H>0 and △S>0 indicated that the adsorption was spontaneous, endothermic and mainly by chemisorption process. Refractory organic compounds such as polycyclic aromatic hydrocarbons and nitrogen heterocyclic compounds were adsorbed before monocyclic aromatic compounds, so the effect of refractory organic compounds on the following semi-coking wastewater-treatment system was greatly induced and some data and theory foundation were provided. Adsorption and desorption experiments indicated that the adsorbent had a better property for repeated use.