锆-有机骨架对水中染料的高选择性可循环吸附

doi:10.13475/j.fzxb.20181100306

纺织学报 ›› 2019, Vol. 40 ›› Issue (02): 141-146.doi: 10.13475/j.fzxb.20181100306

锆-有机骨架对水中染料的高选择性可循环吸附

李庆¹(), 樊增禄², 张洛红¹, 李勇³, 陈创勋¹

1.西安工程大学环境与化学工程学院, 陕西西安 710048
2.西安工程大学陕西省功能性服装面料重点实验室, 陕西西安 710048
3.塔里木大学机械电气化工程学院, 新疆阿拉尔 843300

收稿日期:2018-11-01 修回日期:2018-12-05 出版日期:2019-02-15 发布日期:2019-02-01
作者简介:李庆(1983—),男,讲师,博士。主要研究方向为金属-有机骨架材料的设计及在纺织印染废水处理领域的应用。E-mail: liqingxpu1@163.com。
基金资助:
国家自然科学基金资助项目(11762020);陕西省重点研发计划资助项目(2017KW-026);陕西省科技计划资助项目(2018KW-036);西安市科技计划资助项目(201805030YD8CG14);国家级大学生创新训练计划资助项目(201810709001)

Preferential and recyclable adsorption of dyes from water by Zr-organic skeleton

LI Qing¹(), FAN Zenglu², ZHANG Luohong¹, LI Yong³, CHEN Chuangxun¹

1. College of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
2. Shaanxi Province Key Laboratory of Functional Garment Material, Xi'an Polytechnic University, Xi'an, Shaanxi710048, China
3. College of Mechanical and Electronic Engineering, Tarim University, Alar, Xinjiang 843300, China

Received:2018-11-01 Revised:2018-12-05 Online:2019-02-15 Published:2019-02-01

摘要/Abstract

摘要：

针对染料废水造成的水污染问题,采用溶剂热合成方法,将氯化锆、2,2'-联喹啉-4,4'-二甲酸(H₂L)和苯甲酸混合后,在100 ℃下反应合成了三维多孔的Zr-有机骨架材料(Zr-MOF),对水中的染料进行选择性、可循环吸附。结果表明,在6组由活性染料与阳离子染料组成的双染料混合水溶液中,Zr-MOF实现了对亚甲基蓝(MB)、阳离子艳红5GN(BR14)和阳离子嫩黄7GL(BY24)的高选择性吸附,吸附效率均在79%以上,其中对MB的去除效率高达99.78%。在连续的8轮吸附-脱附循环实验后,Zr-MOF对40 mL的15.7 mg/L的MB染料的去除效率仍高达97.0%。X射线粉末衍射测试表明,经受8次吸附-脱附循环后,以及在pH值为2~14之间的强酸(盐酸)和强碱(NaOH)水溶液中放置48 h之后,Zr-MOF的结晶性几乎毫无变化,显示出十分可靠的稳定性和可循环使用能力。

关键词: Zr-有机骨架, 染料吸附, 可循环吸附, 水稳定性, 染料废水

Abstract:

In view of the water pollution caused by printing and dyeing wastewater, a three dimensional porous Zr-organic skeleton material with high water stability was successfully assembled from ZrCl₄ with 2,2'-Biquinoline-4,4'-dicarboxylicacid (H₂L) under 100 ℃ with solvothermal synthesis method. It was deployed to realize the selective and recyclable adsorption of dyes with different sizes from water. The results demonstrate that the selective adsorption towards Methylene Blue (MB), Cationic Brilliant Red 5GN (BR14) and Cationic Bright Yellow 7GL (BY24) is achieved in 6 groups of mixed aqueous solution composed of reactive dyes and cationic dyes. The removal efficiency towards cationic dyes are all above 79%, in which the removal efficiency for MB is as high as 99.78%. After 8 rounds of adsorption-desorption cycle experiment, the adsorption efficiency of 40 mL 15.7 mg/L MB is still up to 97.0%. In addition, X-ray powder diffraction measurements shows that the crystallinity of Zr-MOF is almost unchanged after 8 adsorption-desorption cycles and 48 h in strong acid (hydrochloric acid) and strong alkali (NaOH) aqueous solution with pH value of 2-14, demonstrating very reliable stability and recycling ability.

Key words: Zr-organic framework, dyes adsorption, recyclable adsorption, water stability, dyeing waste water

中图分类号:

TS190.2

李庆, 樊增禄, 张洛红, 李勇, 陈创勋. 锆-有机骨架对水中染料的高选择性可循环吸附[J]. 纺织学报, 2019, 40(02): 141-146.

LI Qing, FAN Zenglu, ZHANG Luohong, LI Yong, CHEN Chuangxun. Preferential and recyclable adsorption of dyes from water by Zr-organic skeleton[J]. Journal of Textile Research, 2019, 40(02): 141-146.

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参考文献 13

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锆-有机骨架对水中染料的高选择性可循环吸附

Preferential and recyclable adsorption of dyes from water by Zr-organic skeleton

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