摘要
以玉米秸秆为生物炭原料,在600℃高温缺氧条件下煅烧成炭,并利用共沉淀法在其上负载Fe3O4,制得Fe3O4@玉米秸秆炭磁性非均相芬顿催化剂。运用XRD、SEM、EDS和TEM技术对材料进行表征,研究其在不同条件下光-类Fenton协同催化降解水中盐酸四环素的性能,考察材料的磁性回收能力和催化稳定性。结果表明,Fe3O4纳米颗粒均匀覆盖在炭载体表面,整体形貌上保持玉米秸秆通道状多孔结构。初始pH=7条件下降解盐酸四环素的最佳参数为:溶液初始过氧化氢量为10 mmol/L、Fe3O4@玉米秸秆炭催化剂投加量为0.3 g/L、反应时间为60 min。材料具有pH为3~7的适用范围和磁性回收能力。催化剂稳定性强,进行5次重复实验后仍可保持98%的降解率。
The maize straws were used as biological carbon material,calcined at 600℃under high temperature and anoxic conditions and Fe3O4 was loaded on it by co-precipitation method to prepare Fe3O4@maize straws carbon magnetic heterogenous Fenton catalyst.The materials were characterized by XRD,SEM,EDS and TEM.The photo-Fenton-like degradation of tetracycline hydrochloride in water was studied under different conditions.The magnetic recovery and catalytic stability of the materials were investigated.The results show that the Fe3O4 nano-particles uniformly cover the surface of the carbon support and the overall morphology maintains the channel-like porous structure of maize straws.The optimal parameters for the tetracycline hydrochloride degradation under the initial pH 7 condition are as the initial amount of H2O2 in the solution 10 mmol/L,the dosage of Fe3O4@maize straws carbon 0.3 g/L and the reaction time 60 min.The material has a pH range of 3 to 7 and magnetic recovery.It has strong catalytic stability and can maintain a 98%degradation rate after 5 repeated experiments.
作者
林鑫辰
于晓丹
肖成龙
林森
冯威
LIN Xinchen;YU Xiaodan;XIAO Chenglong;LIN Sen;FENG Wei(College of New Energy and Environment,Jilin University,Changchun 130021,China;School of Environment,Harbin Institute of Technology,Harbin 150090,China;Northeast Oil and Gas Corporation,China Petroleum and Chemical Corporation,Changchun 130062,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第5期89-93,共5页
Environmental Science & Technology
基金
国家自然科学基金(6177030724)
