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.
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)
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).
关键词
复合水凝胶
碳酸钙改性
吸附
CIP
Composite hydrogel
Calcium carbonate modification
Adsorption
CIP
