Journal
CHEMICAL ENGINEERING JOURNAL
Volume 371, Issue -, Pages 252-259Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.04.039
Keywords
Adsorption; Big dyes; Metal-organic frameworks; PCN-222(Fe); Water purification
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and future Planning [2017R1A2B2008774]
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Dyes are considered as harmful water pollutants because of their high water solubility, wide uses and toxicity. A highly mesoporous metal-organic framework PCN-222(Fe), together with commercial activated carbon (AC), was applied for the removal of both cationic (brilliant green (BG), crystal violet (CV), and methylene blue (MB)) and anionic (acid red 1 (AR 1), acid blue 80 (AB 80) and methyl orange (MO)) dyes from water through adsorption. The adsorptive performances of PCN-222(Fe) are much higher than AC for big dyes (BG, CV, AR 1, and AB 80). On the contrary, PCN-222(Fe) and AC show not very much different performances for the adsorption of small dyes (MB and MO). The maximum adsorption capacity of PCN-222(Fe) for BG, CV, AR 1, and AB 80 was higher than that of any reported adsorbent so far. The remarkably high adsorption capacity of PCN-222(Fe) for BG (854 mg.g(-1)), CV (812 mg.g(-1)), AR 1 (417 mg.g(-1)) and AB 80 (371 mg.g(-1)) could be explained by suitable pore size of PCN-222(Fe) together with electrostatic and p-p interactions. Moreover, PCN-222(Fe) could be successfully regenerated and reused for several cycles without any severe decrease in adsorption performance. Therefore, PCN-222(Fe) is suggested as an effective adsorbent for the dyes (especially with big size) removal from water.
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