CuFe_(2)O_(4)改性荔枝壳生物炭对水中盐酸四环素的吸附研究  

Study on Adsorption Performance of CuFe_(2)O_(4)-Modified Lychee Sell Biochar for Tetracycline Hydrochloride in Water

作　　者：蔡桦伊 石德智[1] 黄杰[1] 徐硕 刘嘉宇 罗丹[1] CAI Huayi;SHI Dezhi;HUANG Jie;XU Shuo;LIU Jiayu;LUO Dan(Key Laboratory of Three Gorges Reservoir Region's Eco-Environment,Ministry of Education,College of Environment and Ecology,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学环境与生态学院,三峡库区生态环境教育部重点实验室,重庆400044

出　　处：《水处理技术》2024年第7期72-78,共7页Technology of Water Treatment

基　　金：国家重点研发计划项目(2018YFD1100501)。

摘　　要：为实现“以废治污”的目标,以废弃荔枝壳为原料制备生物炭(BC),并采用共沉淀法制备出CuFe_(2)O_(4)改性荔枝壳生物炭复合吸附材料(CuFe_(2)O_(4)@BC)用于水体中盐酸四环素(TCH)的去除。通过BET、SEM-EDS、XRD、FTIR分析了复合吸附材料的微观结构和理化特性,证实了CuFe_(2)O_(4)在荔枝壳生物炭上成功合成且分布均匀。考察了溶液pH、材料投加量、环境温度等因素对CuFe_(2)O_(4)@BC吸附TCH性能的影响,结果表明,相较于改性前BC,CuFe_(2)O_(4)@BC对TCH的吸附能力显著提升,且当pH=5、投加量为0.7 g/L、温度为298 K时,对20 mg/L TCH的去除率达86.34%。吸附过程更符合准二级动力学模型和Freundlich等温模型,吸附过程是以化学吸附为主导的多分子层吸附。For treating pollution with waste,agricultural waste-lychee sell was used as raw material for preparing biochar(BC).The BC was modified by CuFe_(2)O_(4)with the co-precipitation method for synthesizing CuFe_(2)O_(4)@BC,which was applied as composite adsorption material for the removal of tetracycline hydrochloride(TCH)in water.The microstructure and physicochemical properties of CuFe_(2)O_(4)@BC were analyzed by BET,SEM-EDS,XRD,and FTIR.The successful synthesis of CuFe_(2)O_(4)on the lychee shell biochar was confirmed,and CuFe_(2)O_(4)was distributed evenly on the surface of BC.The effect of pH,material dosage,and environmental temperature on the TCH adsorption performance was investigated.Compared to the BC,the adsorption capacity of CuFe_(2)O_(4)@BC was significantly improved.When the initial pH=5,the dosage of 0.7 g/L,and the temperature of 298 K,the removal rate of CuFe_(2)O_(4)@BC for 20 mg/L of TCH reached 86.34%.The adsorption process conformed to the quasi-second-order kinetic model and the Freundlich isothermal model,indicating the adsorption process is a multi-molecular layer adsorption dominated by chemical adsorption.

关 键 词：CuFe_(2)O_(4) 荔枝壳生物炭 吸附 盐酸四环素 

分 类 号：TQ424[化学工程]