中文关键词纳米零价铜(nZVC)分子氧降解羟基自由基恩诺沙星(ENR) 英文关键词nanoscale zero-valent copper(nZVC)molecular oxygendegradationhydroxyl radicalsenrofloxacin(ENR)

作者	单位	E-mail
倪永炯	浙江工业大学建筑工程学院, 杭州 310014	niyongjiong1984@163.com
程永清	浙江工业大学建筑工程学院, 杭州 310014
徐梦苑	浙江工业大学建筑工程学院, 杭州 310014
邱春根	浙江工业大学建筑工程学院, 杭州 310014
马晓雁	浙江工业大学建筑工程学院, 杭州 310014
李军	浙江工业大学环境学院, 杭州 310014
邓靖	浙江工业大学建筑工程学院, 杭州 310014	zjut_djing@163.com

中文摘要 采用纳米零价铜（nanoscale zero-valent copper，nZVC）活化分子氧对水中恩诺沙星（enrofloxacin，ENR）的去除进行了系统研究.通过表征可以发现，纳米铜粉比表面积高于微米级铜粉，无孔隙结构，表面粗糙且容易团聚.纳米级ZVC活化分子氧的性能明显优于微米级ZVC，这主要归因于其较大的比表面积，更容易被腐蚀.通过探究活化机制可以发现，活化分子氧产生的H₂O₂和表面腐蚀产生的Cu⁺构成了新型类Fenton体系，持续释放的羟基自由基是造成水中ENR高效去除的主导活性物种；同时，反应过程中产生的超氧自由基能够促进Cu²⁺还原成Cu⁺，从而加速ENR的去除过程.反应条件对nZVC活化分子氧降解ENR有一定的影响，较高的nZVC投加量、较低ENR浓度、较高的反应温度以及强酸性条件均有利于ENR的去除. 英文摘要 Systematically studied the oxidation of enrofloxacin (ENR) in a nanoscale zero-valent copper (nZVC)-activated molecular oxygen system. The results show that nanoscale copper powder has a higher surface area than microscale copper powder, non-porous structure, and rough surface and exists in form of agglomerates. Nanoscale ZVC shows a superior activated performance toward molecular oxygen compared with microscale ZVC, which is due to its larger specific area and the fact that it corrodes easier. The H₂O₂ generated from the activation of molecular oxygen and the Cu⁺ released from surface corrosion form a novel Fenton-like system in which hydroxyl radicals are continuously produced, resulting in high-efficiency removal of ENR from water. The superoxide radicals produced during the reaction promote the reduction of Cu²⁺ to Cu⁺, thus speeding up the removal of ENR. The reaction conditions have a certain effect on the ENR degradation in nZVC-activated molecular oxygen systems. A higher nZVC dosage, lower ENR concentration, higher reaction temperature, and strong acidic conditions are favorable for the ENR removal.

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