摘要
为开发高效抗生素吸附剂,将钨酸铜通过静电作用负载到碘氧化铋晶体表面,制备了新型多金属氧酸盐复合材料(BiOI/CuWO_(4)),并以扫描电镜、傅里叶红外光谱与X射线能谱等对其进行表征.选用环丙沙星(CIP)、恩诺沙星(ENR)、诺氟沙星(NOR)、氧氟沙星(OFL)这4种典型氟喹诺酮类抗生素(FQs)作为研究对象,在建立同时测定这4种FQs的高效液相色谱分析方法基础上,研究了BiOI/CuWO_(4)对FQS的吸附性能及溶液pH值和吸附剂量等对吸附的影响.结果表明,实验浓度范围内BiOI/CuWO_(4)对NOR、CIP、ENR和OFL的最大吸附量分别为277.8、149.3、113.6和112.4 mg·g^(-1),且能够在3 h内达到吸附平衡,吸附动力学符合准二级吸附动力学模型,对CIP、ENR和OFL的吸附等温线基本复合Langmuir模型,而对NOR的吸附则更加符合Freundlich模型.与其它吸附剂相比,BiOI/CuWO_(4)对4种典型FQs具有较高的吸附量及较好的重复利用性,更符合实际应用需求.
Copper tungstate was electrostatically loaded onto the surface of iodine bismuth oxide crystals to obtain a novel polyoxometallate composite of BiOI/CuWO_(4),whihc was characterized with scanning electron microscopy,Fourier transform infrared spectrometer,energy dispersive X-ray spectroscopy,and etc.The simultaneous determination of ciprofloxacin(CIP),enrofloxacin(ENR),norfloxacin(NOR)and oxfloxacin(OFL)with a high performance liquid chromatography was first developed,and the absorption performance of BiOI/CuWO_(4) for the four fluoroquinolones and its influening factors such as pH value and adsorbent dosage were also investigated.The results show that BiOI/CuWO_(4) presents favorable absorption towards FQs,with the maximum adsorption capacities for NOR,CIP,ENR and OFL being 277.8,149.3,113.6 and 112.4 mg·g^(-1),respectively.The absorption equilibrium can be obtained in 3 h,and the data well fit the pseudo second-order kinetic model.The adsorption isotherms of CIP,ENR and OFL basically fit with Langmuir model,and the adsorption of NOR better fits with Freundlich model.Compared with other adsorbents,BiOI/CuWO_(4) has high adsorption capacities for four FQs with good reusability,and is suitable for practical application.
作者
周莉
童裳伦
ZHOU Li;TONG Changlun(Key Laboratory of Environmental Remediation and Ecological Health of Ministry of Education,College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058)
出处
《环境科学学报》
CAS
CSCD
北大核心
2021年第10期3993-4002,共10页
Acta Scientiae Circumstantiae
基金
国家自然科学基金面上项目(No.21677120)。
关键词
钨酸铜
氟喹诺酮
吸附动力学
吸附剂
吸附等温
copper tungstate
fluoroquinolones
adsorption kinetics
adsorbent
adsorption isotherm
