金属有机骨架杂化泡沫对TC和Cu2+的吸附
ADSORPTION PERFORMANCE OF TC AND Cu2+BY METAL-ORGANIC SKELETON HYBRID FOAMS
李微 1胡淏婷 1刘宁 2叶友林 1高明杰 3冯青4
作者信息
- 1. 沈阳建筑大学市政与环境工程学院,沈阳 110168
- 2. 碧桂园房地产开发有限公司,沈阳 110013
- 3. 辽宁省城乡建设规划设计院有限责任公司,沈阳 110006
- 4. 中国中建设计研究院有限公司,北京 100037
- 折叠
摘要
针对医药废水中抗生素和重金属难以被有效去除的问题,采用金属有机骨架杂化泡沫MIL-100(Fe)/CMC吸附四环素(tetracycline,TC)和铜离子(Cu2+),利用X射线衍射、扫描电镜、氮气吸附脱附和热重分析技术,分析MOFs杂化泡沫理化性能,通过吸附试验研究杂化泡沫吸附性能影响因素、稳定性和吸附机理.结果表明:MIL-100(Fe)/CMC具有丰富的孔道结构和较高的热稳定性,在初始浓度为30 mg/L,MIL-100(Fe)/CMC投加量为40 mg,吸附时间为16 h,pH=6时,MIL-100(Fe)/CMC对TC和Cu2+的最大吸附容量分别为80.40,80.04 mg/g,且离子强度(NaCl)与吸附性能呈负相关.MIL-100(Fe)/CMC具有良好的吸附和循环再生性能,6次循环再生后对TC和Cu2+去除率均保持在70％以上;MIL-100(Fe)/CMC对TC与Cu2+的吸附为 自发放热过程,符合Langmuir等温线模型和拟一级动力学模型.金属有机骨架杂化泡沫对于抗生素和重金属混合污染物去除效果表明其在处理医药废水方面具有广阔的应用前景.
Abstract
The removal of antibiotics and heavy metals in the medicine wastewater is a tricky problem,and the metal-organic skeleton hybrid foam MIL-100(Fe)/CMC was used to remove tetracycline(TC)and copper ions(Cu2+).The physicochemical properties of the MOFs hybrid foams were analyzed by X-ray diffraction,scanning electron microscopy,nitrogen adsorption and desorption,as well as thermogravimetric analysis techniques;the influencing factors,stability,and adsorption mechanisms of hybrid foams were analyzed by adsorption experiments.The results showed that MIL-100(Fe)/CMC had porous structure and high thermal stability;MIL-100(Fe)/CMC had-maximum adsorption capacity of 80.40 and 80.04 mg/g for tetracycline(TC)and Cu2+,respectively,in the optimal working condition of 30 mg/L contaminants,40 mg dosage of MIL-100(Fe)/CMC,16 hours adsorption time,pH of 6 the ionic strength(NaCl)was negatively correlated with adsorption performance.MIL-100(Fe)/CMC had excellent adsorption and cyclic regeneration performance,and the removal rates of TC and Cu2+maintained above 70％after six cycles of regeneration.The adsorption of TC and Cu2+by MIL-100(Fe)/CMC was a self-exothermic process,matching the Langmuir isotherm model and the proposed first-order kinetic model.In conclusion,the metal organic skeleton hybrid foam is proven to have a broad research prospect in the removal of mixed contaminants of antibiotics and heavy metals in the treatment of pharmaceutical wastewater.
关键词
金属有机骨架杂化泡沫/吸附/四环素/Cu2+/循环再生Key words
metal-organic skeletal hybrid foam/adsorbent/tetracycline/Cu2+/cyclic regeneration引用本文复制引用
基金项目
沈阳市科技计划项目(22322310)
辽宁省教育厅科学研究项目(lnqn202010)
辽宁省科技厅自然科学基金(2019ZD0671)
出版年
2024
NETL
NSTL
万方数据