改性沼渣生物炭活化过硫酸盐去除加替沙星研究  

Research on the Removal of Gatifloxacin by Activated Persulfate with Modified Biogas Residue Biochar

作　　者：张楠 殷进[1] 高润 梁声振 贾晓曼 罗芸 ZHANG Nan;YIN Jin;GAO Run;LIANG Shengzhen;JIA Xiaoman;LUO Yun(School of Environmental Science and Engineering,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225009

出　　处：《水处理技术》2024年第3期64-70,共7页Technology of Water Treatment

基　　金：国家自然科学基金(51108401);江苏省自然科学基金项目(BK20151313);2021年江苏省研究生实践创新计划资助项目(SJCX21_1573)。

摘　　要：为探究生物炭(BC)活化过硫酸氢钾(PMS)去除加替沙星(GAT)的机制,本实验以厨余沼渣为原料,制备沼渣生物炭,并进行改性处理得到钴炭复合材料(Co-BC)。探索了Co-BC活化PMS降解GAT的机理,研究了催化剂投加量、PMS溶液浓度、初始pH和反应温度对GAT去除率的影响,同时探究了Co-BC活化PMS的反应机制及其作为催化剂的可再生性。结果表明,改性后生物炭的孔隙结构得到改善,Co元素以CoO晶体形式存在于材料表面,且含有丰富羧基羟基等含氧官能团;Co-BC活化PMS体系对GAT的降解效果最佳,材料投加量和PMS浓度越大反应速率越快,高温碱性条件有利于反应进行;Co-BC活化PMS体系过程中存在自由基和非自由基两种机制协同降解机制;所制备的材料具备良好的再生性能,研究结论为水体中GAT的污染治理提供了新的思路。In order to explore the mechanism of biochar(BC)activation of potassium persulfate(PMS)to remove Gatifloxacin(GAT),the experiment used kitchen waste biogas residue as raw material to prepare biogas residue biochar and modified it to obtain cobalt carbon composite material(Co-BC).The mechanism of Co-BC activated PMS to degrade GAT was explored,and the effects of catalyst dosage,PMS solution concentration,initial pH and reaction temperature on GAT removal rate were studied.At the same time,the reaction mechanism of Co-BC activated PMS and its renewability as a catalyst were also explored.The results show that the pore structure of the modified biochar is improved,and Co exists on the surface of the material in the form of CoO crystal and contains rich oxygen-containing functional groups such as carboxyl hydroxyl group.The Co-BC activated PMS system had the best degradation effect on GAT.The higher the dosage of materials and the concentration of PMS,the faster the reaction rate.In the process of Co-BC activating PMS system,there are two mechanisms of free radical and non-free radical co-degradation mechanism.The results provide a new idea for the treatment of GAT pollution in water.

关 键 词：改性生物炭 过硫酸盐 加替沙星 催化剂活化 

分 类 号：X705[环境科学与工程—环境工程]