狐尾藻生物炭活化过硫酸盐降解四环素的研究  

Research of Tetracycline Degradation by Persulfate Activated with Myriophyllum spicatum Biochar

作　　者：李凯 刘新璐 李辉 马双龙 刘世亮[2] 刘锋 吴善德 徐圣君 LI Kai;LIU Xinlu;LI Hui;MA Shuanglong;LIU Shiliang;LIU Feng;WU Shande;XU Shengjun(Shenzhen Beilinyuan Landscape and Architecture Planning and Design Institute Co.,Ltd.,Shenzhen 518038,China;College of Resource and Environmental Science,Henan Agricultural University,Zhengzhou 450002,China;Research Center for Eco-environmental Science,Chinese Academy of Sciences,Beijing 100085,China;Research Institute of Subtropical Agricultural Ecology,Chinese Academy of Sciences,Changsha 410125,China)

机构地区：[1]深圳市北林苑景观及建筑规划设计院有限公司,广东深圳518038 [2]河南农业大学资源与环境学院,河南郑州450002 [3]中国科学院亚热带农业生态研究所,北京海淀100085 [4]中国科学院生态环境研究中心,湖南长沙410125

出　　处：《环境科学与技术》2021年第6期50-57,共8页Environmental Science & Technology

基　　金：深圳市技术创新计划技术攻关项目(JSGG20180718115204691);国家自然科学基金项目(41907150)。

摘　　要：该文使用K2FeO4活化法构建了环境友好的基于狐尾藻的新型多孔石墨化生物炭(PGMC)。以PGMC作为催化剂来活化过一硫酸盐(PMS)降解水中的四环素(TC)。不同热解温度条件(700、800和900℃)对制备出的PGMC(PGMC700、PGMC800、PGMC900)的物理化学性质影响很大。PGMC800展现出最好活化PMS降解TC的性能得易于其更大的比表面积。在反应温度为25℃、PGMC800的用量为0.05 g/L、PMS的加入量为0.5 g/L的条件下,可以实现对30 mg/L TC的高效去除(30 min去除82.2%)。化学淬灭剂、电子顺磁共振(EPR)和线性扫描伏安(LSV)测试揭示了TC的降解得益于非自由基路径(^(1)O_(2)和电子传导)而不是自由基路径(SO_(4)^(·-)和·OH)。Novel porous graphitized Myriophyllum spicatum biochar(PGMC)was prepared by K2FeO4 activation method.PGMC was used as a catalyst to activate permonosulfate(PMS)for the degradation of tetracycline(TC)in water.Different pyrolysis temperatures(700℃,800℃and 900℃)have significant effects on the physicochemical property of PGMC(PGMC700,PGMC800 and PGMC900).Thanks to the larger specific surface area,PGMC800 owned the best PMS activation performance for TC degradation.Under such a condition that the reaction temperature is 25℃,the usage amount of PGMC800 is 0.05 g/L and the addition amount of PMS is 0.5 g/L,30 mg/L TC can be efficient removed with removal rate of 82.2%after 30 min.Moreover,chemical scavengers,electron paramagnetic resonance(EPR)and linear scanning voltammetric(LSV)experiments revealed that that the degradation of TC was due to non-radical pathway(^(1)O_(2) and electron transfer)rather than radical pathway(SO_(4)^(·-) and·OH).

关 键 词：生物炭 过一硫酸盐 四环素 热解温度 非自由基路径 

分 类 号：X505[环境科学与工程—环境工程]