Duan Qiannan, Lee Jianchao, Chen Han, Zheng Yunyun
State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University, Nanjing 210046, China; Department of Environment Science, Shaanxi Normal University, Xi'an 710062, China E-mail:
Department of Environment Science, Shaanxi Normal University, Xi'an 710062, China E-mail:
Water Sci Technol. 2017 Dec;76(11-12):3069-3078. doi: 10.2166/wst.2017.475.
A novel magnetically separable magnetic activated carbon supporting-copper (MCAC) catalyst for catalytic wet peroxide oxidation (CWPO) was prepared by chemical impregnation. The prepared samples were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) method, and scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS). The catalytic performance of the catalysts was evaluated by direct violet (D-BL) degradation in CWPO experiments. The influence of preparative and operational parameters (dipping conditions, calcination temperature, catalyst loading HO dosage, pH, reaction temperature, additive salt ions and initial D-BL concentration) on degradation performance of CWPO process was investigated. The resulting MCAC catalyst showed higher reusability in direct violet oxidation than the magnetic activated carbon (MAC). Besides, dynamic tests also showed the maximal degradation rate reached 90.16% and its general decoloring ability of MCAC was 34 mg g for aqueous D-BL.
通过化学浸渍法制备了一种用于催化湿式过氧化物氧化（CWPO）的新型磁分离磁性活性炭负载铜（MCAC）催化剂。采用X射线衍射（XRD）、布鲁诺尔-埃米特-泰勒（BET）法以及配备能谱仪（EDS）的扫描电子显微镜（SEM）对制备的样品进行了表征。通过CWPO实验中直接紫（D-BL）的降解来评估催化剂的催化性能。研究了制备和操作参数（浸渍条件、煅烧温度、催化剂负载量、过氧化氢用量、pH值、反应温度、添加盐离子和初始D-BL浓度）对CWPO过程降解性能的影响。所得的MCAC催化剂在直接紫氧化中比磁性活性炭（MAC）表现出更高的可重复使用性。此外，动态测试还表明，MCAC对水溶液中D-BL的最大降解率达到90.16%，其一般脱色能力为34 mg/g。
