State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 10083, PR China.
Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes, Shanxi University, Taiyuan, 030006, PR China.
J Hazard Mater. 2020 Jun 15;392:122295. doi: 10.1016/j.jhazmat.2020.122295. Epub 2020 Feb 14.
A facile and cost effective acid leaching-coprecipitation method was developed to prepare spinel-type (Mg,Ni)(Fe,Al)O from saprolite laterite ore in large scale. The as-prepared (Mg,Ni)(Fe,Al)O exhibited excellent photo-Fenton-like catalytic activity in decomposing different kinds of organic dyes and antibiotic tetracycline in the present of oxalic acid (HCO). The influential factors of RhB degradation efficiency were investigated, including the (Mg,Ni)(Fe,Al)O dosage, HCO concentration and the intensity of simulated sunlight. Meanwhile, the reaction mechanism of (Mg,Ni)(Fe,Al)O/HCO/simulated sunlight system was also proposed. As the formation of highly photochemical [≡Fe(CO)] complex ions on the surface of the (Mg,Ni)(Fe,Al)O, the obtained (Mg,Ni)(Fe,Al)O showed degradation efficiency (η) over 90.0 % for common organic dyes and antibiotic tetracycline within 180 min under the optimum conditions. The η and TOC removal for RhB were still over 98.0 % and 46.0 % after five reuse cycles, respectively. The excellent catalytic performance and recyclability make the (Mg,Ni)(Fe,Al)O fabricated from natural saprolite laterite ore more competitive in dealing with wastewaters contaminated by organic pollutants.
一种简便、经济的酸浸-共沉淀法被开发用于大规模制备来自腐泥土矿的尖晶石型（Mg,Ni）（Fe,Al）O。所制备的（Mg,Ni）（Fe,Al）O 在草酸（HCO）存在下，在分解不同类型的有机染料和抗生素四环素方面表现出优异的类芬顿光催化活性。研究了 RhB 降解效率的影响因素，包括（Mg,Ni）（Fe,Al）O 用量、HCO 浓度和模拟太阳光强度。同时，还提出了（Mg,Ni）（Fe,Al）O/HCO/模拟太阳光体系的反应机制。由于（Mg,Ni）（Fe,Al）O 表面形成了高光化学的[≡Fe(CO)]配合物离子，在最佳条件下，该（Mg,Ni）（Fe,Al）O 对常见的有机染料和抗生素四环素在 180 分钟内的降解效率（η）超过 90.0%。经过五次重复使用循环后，RhB 的 η 和 TOC 去除率仍分别超过 98.0%和 46.0%。该（Mg,Ni）（Fe,Al）O 的优异催化性能和可回收性使其在处理有机污染物污染的废水方面更具竞争力。
