Department of Petrochemical, Faculty of Technology, 20 August 1955 University of Skikda, El Hadaik Road, Skikda 21000, Algeria.
Laboratory of Catalysis, Bioprocess and Environment, Department of Process Engineering, Faculty of Technology, 20 August 1955 University of Skikda, El Hadaik Road, Skikda 21000, Algeria.
Molecules. 2022 Nov 3;27(21):7528. doi: 10.3390/molecules27217528.
In this study, natural Algerian kaolin was used as a support and impregnated with nickel at different loading amounts (2 wt.%, 5 wt.%, and 7 wt.%) in order to prepare a supported catalyst. The wet impregnation technique was used in this preparation; nickel oxide (NiO) was the active phase precursor of the catalyst, and the catalysts were designated as follows: 2%, 5%, and 7% Ni/kaolin. These catalysts were put to the test in catalytic wet peroxide oxidation (CWPO) for degrading the organic contaminant malachite green dye (MG). Analytical techniques such as FTIR spectroscopy, X-ray diffraction, BET, and X-fluorescence were used to examine the structure, morphology, and chemical composition of the support and the produced catalysts. Several parameters, including temperature, catalytic dose, metal loading, hydrogen peroxide volume, and kinetic model were systematically investigated. The combination of improved parameters resulted in a significant increase in the catalytic activity, achieving a high removal rate of MG dye of 98.87%.
在这项研究中，天然阿尔及利亚高岭土被用作载体，并以不同的负载量（2wt.%、5wt.%和 7wt.%）浸渍镍，以制备负载型催化剂。该制备过程采用湿法浸渍技术，镍氧化物（NiO）为催化剂的活性相前体，催化剂分别命名为：2%、5%和 7%Ni/高岭土。这些催化剂在催化湿式过氧化物氧化（CWPO）中用于降解有机污染物孔雀石绿染料（MG）。采用傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、BET 和 X 射线荧光（XRF）等分析技术对载体和制备的催化剂的结构、形貌和化学组成进行了研究。系统研究了温度、催化剂量、金属负载量、过氧化氢体积等参数，并建立了动力学模型。优化这些参数的组合使催化活性显著提高，MG 染料的去除率达到了 98.87%。
