Ni Yong-Jiong, Cheng Yong-Qing, Xu Meng-Yuan, Qiu Chun-Gen, Ma Xiao-Yan, Li Jun, Deng Jing
College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China.
College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
Huan Jing Ke Xue. 2019 Jan 8;40(1):293-299. doi: 10.13227/j.hjkx.201803215.
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 HO 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 Cu 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.
系统研究了恩诺沙星（ENR）在纳米零价铜（nZVC）活化分子氧体系中的氧化过程。结果表明，纳米级铜粉比微米级铜粉具有更高的比表面积、无孔结构和粗糙表面，且以团聚体形式存在。与微米级零价铜（ZVC）相比，纳米级ZVC对分子氧表现出更优异的活化性能，这归因于其更大的比表面积以及更易腐蚀的特性。分子氧活化产生的羟基自由基（HO）和表面腐蚀释放的铜形成了一种新型类芬顿体系，其中羟基自由基不断产生，从而实现了水中恩诺沙星的高效去除。反应过程中产生的超氧自由基促进了铜还原为铜，进而加速了恩诺沙星的去除。反应条件对nZVC活化分子氧体系中恩诺沙星的降解有一定影响。较高的nZVC投加量、较低的恩诺沙星浓度、较高的反应温度和强酸性条件有利于恩诺沙星的去除。
