铁基微电解材料脱除水中Cr(Ⅵ)的研究进展  

RESEARCH PROGRESS ON THE REMOVAL OF Cr(Ⅵ)FROM WATER BY IRON-BASED MICRO ELECTROLYTIC MATERIALS

作　　者：史肖宁 甄常亮 赵凯 李俊国 Shi Xiaoning;Zhen Changliang;Zhao Kai;Li Junguo(School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210

出　　处：《河北冶金》2023年第11期14-18,46,共6页Hebei Metallurgy

基　　金：河北省科技厅中央引导地方项目(236Z3806G)。

摘　　要：工业生产过程中产生的高毒性Cr(Ⅵ)易对人体健康和环境安全构成严重威胁,铁基微电解材料脱除水体Cr(Ⅵ)的研究进展表明,以Fe0、Fe^(2+)和H^(+)将Cr(Ⅵ)还原为Cr(Ⅲ),通过吸附、还原、共沉淀等一系列协同反应,可实现Cr(Ⅵ)无害化处置。综述了铁基微电解材料的原料、制备工艺、Cr(Ⅵ)脱除能效等方面的研究进展,结果表明:在铁碳基体中添加Ni、Cu、Pd等催化金属加速阳极Fe氧化及电子的转移、催化H+的产生、与Fe^(2+)和Fe^(3+)之间的氧化还原反应利于多路径脱除Cr(Ⅵ),显著提高脱铬效率,该工艺有望成为该领域的研究方向,但上述金属的添加制备复杂且导致成本增加。在此基础上,提出了一种以钒钛铁精粉碳热法制备微电解材料的工艺,实现基于钒钛复杂伴生矿矿物特性的综合利用,但其中铁-碳-钒-钛多元耦合体系的协同脱铬机制有待深入研究。The highly toxic Cr(Ⅵ)produced in the industrial production process is easy to pose a serious threat to human health and environmental safety,and the research progress of iron-based micro electrolytic materials to remove Cr(Ⅵ)from water shows that the reduction of Cr(Ⅵ)to Cr(Ⅲ)by Fe 0,Fe^(2+)and H^(+)can realize the harmless disposal of Cr(Ⅵ)through a series of synergistic reactions such as adsorption,reduction and co-precipitation.The results show that the addition of Ni,Cu,Pd and other catalytic metals to the iron-carbon matrix accelerates the oxidation of anode Fe and electron transfer,catalyzes the generation of H+,and the redox reaction with Fe^(2+)and Fe^(3+)is conducive to the multipath removal of Cr(Ⅵ)and significantly improves the efficiency of chromium removal.On this basis,a process for preparing micro electrolytic materials by carbothermal method of vanadium-titanium-iron fine powder was proposed to realize the comprehensive utilization of the mineral characteristics of vanadium-titanium complex associated minerals,but the synergistic dechromization mechanism of iron-carbon-vanadium-titanium multiple coupling system needs to be further studied.

关 键 词：微电解材料 Cr(Ⅵ) 脱铬 氧化还原 催化金属 电子转移 

分 类 号：TF04[冶金工程—冶金物理化学]