Hierarchical porous induced competent removal of low concentration azo dye molecules by generating a leachy crystalline structure H-MIL-53(Fe) |
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| Institution: | 1. State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China;3. Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, Hungary;1. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433 China;2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092 China;1. College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 211816, PR China;2. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing, 211800, PR China;1. Researcher & Quality Control Expert in Water and Wastewater Company of East Azerbaijan Province, Iran;2. Department of Applied Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran;3. Zabol Medicinal Plants Research Center, Zabol University of Medical Sciences, P.O. Box 3333-669699, Zabol, Iran;4. Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran |
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| Abstract: | The development in technology of synthetic azo dyes, has led to excessive water resources pollution. Even at lower concentration they can impart the quality of water and human life. Herein, we have developed a novel synthesis strategy via introducing salicylic acid (SA) for the synthesis of a leachy crystalline material H-MIL-53(Fe) with hierarchical pores (HP) and exposed coordination unsaturated sites (CUS), which had higher surface area and larger pore volume than the as synthesized MIL-53(Fe). Due to these characteristics, H-MIL-53(Fe) was competent removal of orange G (OG, one of the frequently used azo dyes) with equilibrium in 300 min and the maximum adsorption capacity of 163.9 mg/g. The adsorption mechanism of OG onto H-MIL-53(Fe) was mostly based on electrostatic attraction between CUS of H-MIL-53(Fe) along with HP as active species to OG diffusion and bind. By comparing H-MIL-53(Fe) with other adsorbents for OG adsorption, it is undoubtedly that H-MIL-53(Fe) can be used as a promising adsorbent for OG removal from aqueous solutions. |
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| Keywords: | H-MIL-53(Fe) Salicylic acid Leachy crystalline Adsorption Orange G removal |
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