Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (02): 141-146.doi: 10.13475/j.fzxb.20181100306

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

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

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

  1. 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

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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

CLC Number: 

  • TS190.2

Fig.1

FT-IR spectra of Zr-MOF and H2L"

Fig.2

TGA plot of Zr-MOF"

Fig.3

XRD patterns of single crystal and bulk samples"

Fig.4

Normalized sequential UV-Vis spectra of mixed aqueous solution after addition of Zr-MOF"

Fig.5

Adsorption of Zr-MOF towards (MB+MO) mixed aqueous solution"

Fig.6

Desorption of MB from MB@Zr-MOF in saturated methanol solution of sodium chloride (a) and adsorption/desorption efficiency varied with recycle number of Zr-MOF towards MB (b)"

Fig.7

XRD patterns of Zr-MOF 8 times of recycle and different pH"

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