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Metal-doped (Cu,Zn)Fe 2 O 4 from integral utilization of toxic Zn-containing electric arc furnace dust: An environment-friendly heterogeneous Fenton-like catalyst
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-07-13 , DOI: 10.1007/s12613-019-1962-y
Jun-wu Li , Xing Han , Rong-xia Chai , Fang-qin Cheng , Mei Zhang , Min Guo

Pure metal-doped (Cu,Zn)Fe2O4 was synthesized from Zn-containing electric arc furnace dust (EAFD) by solid-state reaction using copper salt as additive. The effects of pretreated EAFD-to-Cu2(OH)2CO3·6H2O mass ratio, calcination time, and calcination temperature on the structure and catalytic ability were systematically studied. Under the optimum conditions, the decolorization efficiency and total organic carbon (TOC) removal efficiency of the as-prepared ferrite for treating a Rhodamine B solution were approximately 90.0% and 45.0%, respectively, and the decolorization efficiency remained 83.0% after five recycles, suggesting that the as-prepared (Cu,Zn)Fe2O4 was an efficient heterogeneous Fenton-like catalyst with high stability. The high catalytic activity mainly depended on the synergistic effect of iron and copper ions occupying octahedral positions. More importantly, the toxicity characteristic leaching procedure (TCLP) analysis illustrated that the toxic Zn-containing EAFD was transformed into harmless (Cu,Zn)Fe2O4 and that the concentrations of toxic ions in the degraded solution were all lower than the national emission standard (GB/31574—2015), further confirming that the as obtained sample is an environment-friendly heterogeneous Fenton-like catalyst.



中文翻译:

综合利用有毒含锌电弧炉粉尘产生的金属掺杂(Cu,Zn)Fe 2 O 4:一种环境友好的非均相类Fenton催化剂

以铜盐为添加剂,通过固相反应,由含锌电弧炉粉尘(EAFD)合成了纯金属掺杂的(Cu,Zn)Fe 2 O 4。系统研究了预处理的EAFD与Cu 2(OH)2 CO 3 ·6H 2 O的质量比,煅烧时间和煅烧温度对结构和催化性能的影响。在最佳条件下,所制备的用于处理若丹明B溶液的铁氧体的脱色效率和总有机碳(TOC)去除效率分别约为90.0%和45.0%,经过五次循环后,脱色效率保持在83.0%,表明所制备的(Cu,Zn)Fe 2O 4是高效且具有高稳定性的非均相类Fenton催化剂。高催化活性主要取决于占据八面体位置的铁和铜离子的协同作用。更重要的是,毒性特征浸出程序(TCLP)分析表明,有毒的含锌EAFD被转化为无害的(Cu,Zn)Fe 2 O 4,并且降解溶液中的有毒离子浓度均低于国家标准。排放标准(GB / 31574—2015),进一步证实所获得的样品是一种环境友好的非均相芬顿样催化剂。

更新日期:2020-07-13
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