引用本文:陈红成, 黄玉明, 奉萍.Fe-Zr双金属有机框架材料吸附去除水中磷酸盐[J].西南大学学报(自然科学版),2019,41(5):80~84
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Fe-Zr双金属有机框架材料吸附去除水中磷酸盐
陈红成, 黄玉明, 奉萍
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
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.
关键词:  金属有机框架|吸附|磷酸盐|除磷吸附剂
DOI:10.13718/j.cnki.xdzk.2019.05.013
分类号:X703
基金项目:国家重点研发计划课题(2017YFC0404704).
Adsorption Removal of Phosphate from Water with an Fe-Zr Bimetallic Organic Framework
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
Abstract:
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.
Key words:  metal organic framework|adsorption|phosphate|phosphorus removal adsorbent
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