摘要
为降低四环素(TCs)处理成本,实现“以废治污”的绿色发展目标,以农业废弃物皂荚(GS)为原料,NaHCO3为活化剂,铁和锰为负载金属,通过水热合成法改性制备磁性复合吸附剂(Mn_(2)FeO_(4)@GS)。采用SEM、FTIR、XRD、BET等表征方法对Mn_(2)FeO_(4)@GS的微观结构进行表征,并考察了不同单因素实验条件下,Mn_(2)FeO_(4)@GS对TCs的吸附行为。结果表明,Mn_(2)FeO_(4)@GS对TCs去除率达到91.70%,与未改性GS相比,提高了65.73%,有效弥补了GS吸附能力的不足。吸附过程符合准2级动力学模型和Freundlich等温模型,吸附过程是以化学吸附为主的多层吸附。
In this study,we synthesized a cost-effective adsorbent(Mn_(2)FeO_(4)@GS)to deal with tetracyclines(TCs)in wastewater.We took agricultural waste-gleditsia sinensis(GS)as raw materials,and modified by hydrothermal synthesis method with NaHCO_(3) as activators and iron and manganese as supporting metals.We investigated its microstructure with characterized methods by SEM,FTIR,XRD and BET,and studyed adsorption behavior of Mn_(2)FeO_(4)@GS on TCs under different single factor experimental conditions.The results showed that the removal rate of TCs was up to 91.70%,which was 65.73%higher than that of unmodified GS,effectively remedying defects of GS.The adsorption processes conformed to the pseudosecond-order kinetic model and Freundlich isothermal model,and the adsorption processes were multi-layer adsorptions and dominated by chemical adsorption.
作者
陈川
谢磊
况洪海
熊小晗
CHEN Chuan;XIE Lei;KUANG Honghai;XIONG Xiaohan(Key Laboratory of Pollution Control and Resource Recovery Technology,University of South China,Hengyang 421001,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2022年第11期102-107,共6页
Technology of Water Treatment
基金
国家自然科学基金(11275095)。
