Wang Song, Dou Jiali, Zhang Tingting, Li Sanxi, Chen Xuecheng
School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang 110870, China.
Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland.
ACS Omega. 2023 Sep 15;8(38):35024-35033. doi: 10.1021/acsomega.3c04124. eCollection 2023 Sep 26.
As the discharge amount of dye wastewater increases with the development of the textile printing and dyeing industries, the treatment of the dyes in the wastewater becomes more complex. The adsorption method is a commonly used method for treating dye wastewater. The adsorbent is the key factor affecting the adsorption performance. To develop a high-performance adsorbent, a porous carbon material prepared from potassium citrate by the calcination method was applied in the adsorption of dye-containing water in this study. The morphology and pore structure of the porous carbon materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and N adsorption/desorption isotherm. The porous carbon material with a specific surface area of 1436 m g, PC-900, was used as an adsorbent for the adsorption of methyl orange (MO) and methylene blue (MB). The results showed that the maximum adsorption capacity of PC-900 for MO and MB reached 927 and 1853.6 mg g, respectively. Studies on adsorption kinetics and adsorption isotherms showed that the pseudo-second-order kinetic model and the Langmuir isotherm model were more appropriate to describe the adsorption process of MO and MB by PC-900. In addition, the results of the mixed adsorption experiment of MO and MB dyes showed that PC-900 had selective adsorption for MB.
随着纺织印染行业的发展，染料废水排放量不断增加，废水中染料的处理变得更加复杂。吸附法是处理染料废水常用的方法。吸附剂是影响吸附性能的关键因素。为了开发一种高性能吸附剂，本研究将通过煅烧法由柠檬酸钾制备的多孔碳材料应用于含染料水的吸附。通过扫描电子显微镜（SEM）、X射线衍射（XRD）和N吸附/脱附等温线对多孔碳材料的形貌和孔结构进行了表征。将比表面积为1436 m²/g的多孔碳材料PC-900用作吸附剂来吸附甲基橙（MO）和亚甲基蓝（MB）。结果表明，PC-900对MO和MB的最大吸附容量分别达到927和1853.6 mg/g。吸附动力学和吸附等温线研究表明，准二级动力学模型和朗缪尔等温线模型更适合描述PC-900对MO和MB的吸附过程。此外，MO和MB染料的混合吸附实验结果表明，PC-900对MB具有选择性吸附。
