采用过渡金属Cu、Co和Mn对纳米零价铁(nZVI)掺杂改性,制备铁基双金属nZVI/Cu、nZVI/Co和nZVI/Mn催化剂,用于活化过氧单硫酸盐(PMS),研究了不同过渡金属、催化体系和过渡金属掺杂量对催化降解诺氟沙星(NOR)性能的影响.结果表明,当 Co 的掺杂量为 5%时,nZVI/Co-5%/PMS 活化体系在 120 min 内实现了84.4%的NOR去除.优异的活化降解性能主要得益于过渡金属Co的引入抑制了nZVI的钝化和团聚.
Study on the removal performance of norfloxacin by activated peroxymonosulfate(PMS)over iron-based bimetallic catalysts
The transition metals(Cu,Co and Mn)were used to dope-modify nanozero-valent iron(nZ-VI),and iron-based bimetallic nZVI/Cu,nZVI/Co and nZVI/Mn catalysts were prepared for the activa-tion of PMS to achieve the efficient degradation of norfloxacin(NOR).The effects of different transition metals,catalytic systems and transition metal doping mass ratios on the catalytic degradation performance of NOR were investigated.The results showed that the nZVI/Co-5%/PMS activated system achieved 84.4%NOR removal within 120 min when the doping amount of Co was 5%.The excellent activated degradation performance was mainly attributed to the introduction of transition metal Co to inhibit the pas-sivation and agglomeration of nZVI.
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