改性海藻酸钠-聚乙烯亚胺-氧化石墨烯复合水凝胶对环丙沙星的吸附研究  

Adsorption of Ciprofloxacin by Modified Sodium Alginate Polyvinyl Imine Go Composite Hydrogel

作　　者：李茂林 戴友芝 张柱 于芹芹 LI Mao-lin;DAI You-zhi;ZHANG Zhu;YU Qin-qin(College of Environment and Resources,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学环境与资源学院,湖南湘潭411105

出　　处：《环境科技》2022年第3期1-6,共6页Environmental Science and Technology

基　　金：国家自然科学基金(21777135);湖南省社会发展领域第七批重点研发项目(2018SK2021).

摘　　要：为了解改性SA-PEI-GO材料的结构特点、理化特性及pH值、投加量对改性凝胶球吸附CIP的影响,根据该材料的扫描电镜及能量散射光谱(SEM-EDS)和红外光谱(FT-IR)表征图像,通过对改性与未改性凝胶球吸附环丙沙星(CIP)过程进行研究。研究结果证明:改性后增强了SA-PEI-GO对CIP吸附性能;吸附去除率提高为91%;平衡时间缩短为10 h;最佳pH值为7;最佳投加量为1.0 g(湿重);吸附过程符合Freundlich等温模型和伪二级动力学模型;连续6次吸附-解吸循环后,仍有较高去除率。In order to understand the structural characteristics,physical and chemical properties,pH value and dosage of the modified SA-PEI-GO material on the adsorption of CIP,according to the scanning electron microscopy and energy scattering spectrum(SEM-EDS)and infrared spectrum(FT-IR)characterization images of the material,The adsorption of ciprofloxacin(CIP)by modified and unmodified gel spheres was studied.The results showed that the modification enhanced the adsorption capacity of SA-PEI-GO to CIP.The adsorption removal rate increased to 91%.Balance time reduced to 10 h;The optimal pH value is 7.The optimal dosage is 1.0 g(wet weight).The adsorption process accords with Freundlich isothermal model and pseudo-second-order kinetic model.After 6 cycles of adsorption-desorption,the removal rate is still high.

关 键 词：复合水凝胶 碳酸钙改性 吸附 CIP 

分 类 号：X5[环境科学与工程—环境工程]