MOF-808@PAN吸附剂去除水中抗生素性能研究

Performance study of MOF-808@PAN adsorbent removing antibiotics from water

中文关键词: 水污染  抗生素  吸附分离  金属有机框架(MOF)  MOF-808

英文关键词: water pollution  antibiotics  adsorption separation  metal-organic framework (MOF)  MOF-808

中文摘要:

      吸附法被广泛认为是一种高效去除水中抗生素的技术．但是，传统的吸附材料存在吸附容量低、回收困难等问题．选择MOF-808材料作为吸附主体，聚丙烯腈(PAN)作为载体，采用相转化法制备了MOF-808@PAN吸附剂．四环素溶液的静态吸附实验结果表明，当MOF-808和PAN质量比优化为2.5∶1时，吸附剂对四环素的吸附效率超过90%，并具有112.2 mg/g的最大吸附容量．该吸附过程符合Langmuir等温吸附模型、准二级动力学模型以及颗粒内扩散模型．此外，该吸附剂在宽泛的pH范围以及高浓度的四环素溶液中均表现良好．首次将MOF-808材料用于水中抗生素的吸附去除，可为其他粉末吸附材料的工程化应用提供参考．

英文摘要:

      The adsorption method has been widely considered as an efficient technology for removing antibiotics from water. However, the traditional adsorbents have insufficient adsorption capacity and difficult recovery. The MOF-808@PAN adsorbent is prepared using phase inversion method with MOF-808 and polyacrylonitrile (PAN) as adsorption sites and support, respectively. For the static adsorption experiment of tetracycline solution, the MOF-808@PAN adsorbent with optimized mass ratio (m(MOF-808)/m(PAN)=2.5∶1) shows maximum adsorption capacity of 112.2 mg/g and over 90% of adsorption efficiency. This adsorption process fits well with Langmuir adsorption isotherm model, pseudo-second order kinetic model and intra-particle diffusion model. Furthermore, this adsorbent exhibits good performance in wide pH range and high concentration of tetracycline solution. MOF-808 is utilized to adsorb antibiotics from water for the first time, which can provide reference for the engineering application of other powder adsorbents.