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- W4382364483 abstract "Various works have been conducted for enhancing anionic dye removal onto boehmite. However, the influence of the water content in boehmite on its adsorption performance has not been investigated to date. Therefore, we explored the impact of the level of dehydration of boehmite on its structural water content and anionic dye removal. Adsorbents were prepared via sol-gel method, followed by heat treatment under temperature range of 70°C – 200°C, covering weak and strong dehydration, and were tested for adsorption of methyl orange and Congo red. Surface properties of adsorbents including functional groups, crystallinity, surface area, porosity, and zeta potential were investigated. Strong dehydration yielded crystalline structures with high surface area (110-140 m2/g) and low water content, ineffective for anionic dye removal. Meanwhile, weakly dehydrated samples holding a low surface area (nonporous – 5.05 m2/g) and high water content exhibited excellent adsorption of the tested anionic dyes. The amorphous boehmite prepared at 100°C showed the highest adsorption capacity of methyl orange (320 mg/m2, 900 mg/g), while the nonporous amorphous sample prepared at 200°C demonstrated the highest adsorption capability for Congo red (527 mg/g). Through analyzing the adsorption results, chemical structure of the dyes, and surface characteristics of the adsorbents, we identified that the adsorption mechanism is influenced by electrostatic forces or hydrogen bonding. These findings present a promising application of weak dehydration and its resulting boehmite for effective adsorption of organic dyes in water." @default.
- W4382364483 created "2023-06-29" @default.
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- W4382364483 date "2023-10-01" @default.
- W4382364483 modified "2023-09-25" @default.
- W4382364483 title "Weak dehydration enhances the adsorption capacity of boehmite for anionic dyes" @default.
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- W4382364483 doi "https://doi.org/10.1016/j.colsurfa.2023.131954" @default.
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