Fe-Zr双金属-有机框架材料吸附去除水中磷酸盐  

Adsorption Removal of Phosphate from Water with an Fe-Zr Bimetallic Organic Framework

作　　者：陈红成 黄玉明[1] 奉萍[1] CHEN Hong-cheng;HUANG Yu-ming;FENG Ping(The Key Laboratory of the Three Gorges Reservoir Region s Eco-Environments, Ministry of Education/School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China)

机构地区：[1]三峡库区生态环境教育部重点实验室/西南大学化学化工学院,重庆400715

出　　处：《西南大学学报（自然科学版）》2019年第5期80-84,共5页Journal of Southwest University(Natural Science Edition)

基　　金：国家重点研发计划课题(2017YFC0404704)

摘　　要：用溶剂热法合成Fe-Zr双金属有机框架(metal organic framework, MOF)材料并研究了其吸附水中磷酸盐的性能,考察了溶液pH值和吸附剂用量对吸附的影响.结果表明, pH值为中性时Fe-Zr MOF吸附磷的效果最佳; Fe-Zr MOF对磷酸盐的吸附在24 h时达到平衡,吸附过程符合准二级动力学方程;吸附等温曲线可用Langmuir方程描述,最大吸附量为285.7 mg/g; Fe-Zr MOF材料重复利用10次后,对磷酸盐的吸附量为最初吸附量的80.6%,显示出良好的重复利用性能.An Fe-Zr bimetallic organic framework(MOF) was synthesized with the solvothermal method, and the adsorption characteristics of phosphate onto Fe-Zr MOF in aqueous solution were studied. The effects of solution pH and dosage of Fe-Zr MOF adsorbent on the removal of phosphate were investigated. The results showed that the maximum phosphate adsorption with Fe-Zr MOF was obtained at the neutral pH condition. Also, the adsorption of phosphate onto Fe-Zr MOF reached equilibrium at 24 h, and the pseudo-second-order kinetic model was well suitable for modeling phosphate adsorption by Fe-Zr MOF. The adsorption isotherm of phosphate fitted well with the Langmuir equation, with a maximum adsorption capacity of 285.7 mg/g. After ten regeneration cycles, the removal efficiency of phosphate remained as high as 80.6%, showing a good reusability of the Fe-Zr MOF adsorbent.

关 键 词：金属有机框架 吸附 磷酸盐 除磷吸附剂 

分 类 号：X703[环境科学与工程—环境工程]