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- W4380608385 abstract "Abstract A reinforced composite aerogel absorbent was synthesized using a green chemistry method and an environmentally friendly freeze-drying technique. The absorbent consisted of sodium alginate, Polyethyleneimine (PEI), and graphene oxide (GO). The ability of the absorbent to remove Cr(Ⅵ) ions from aqueous solutions was studied. PEI was a nitrogen source for Cr(Ⅵ) removal and a cross-linking agent for GO sheets, while SA was a reinforcing material. The aerogel was investigated using X-ray diffraction, scanning electron microscopy, Fourier transform infrared (FTIR) spectroscopy, texture analysis, Raman spectroscopy, and thermogravimetric analysis (TGA). Batch studies were conducted to investigate the effect of pH and contact time on adsorption. The results indicated that the SA/PEI/GO aerogel had a maximum adsorption capacity of 174.05 mg/g for Cr(Ⅵ) at pH 2. The adsorption mechanism was described using the Langmuir isotherm and pseudo-second-order kinetic models. Thermodynamic studies revealed that the adsorption process was spontaneous and endothermic. The aerogel demonstrated good regeneration ability and satisfactory recovery for Cr(Ⅵ) even after five cycles. These findings suggest that the composite aerogel could be a promising adsorbent for efficiently removing Cr(Ⅵ) from wastewater." @default.
- W4380608385 created "2023-06-15" @default.
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- W4380608385 date "2023-06-14" @default.
- W4380608385 modified "2023-09-23" @default.
- W4380608385 title "Effective Removal of Cr(VI) from Aqueous Solution by Reinforced Sodium Alginate/Polyethyleneimine/Graphene Oxide Composite Aerogels" @default.
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- W4380608385 doi "https://doi.org/10.21203/rs.3.rs-2917919/v1" @default.
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