Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Novel Adsorbent Prepared by Aluminum-Containing Waste Residue and Its Application for Congo Red Wastewater Decolorization

Version 1 : Received: 1 July 2023 / Approved: 3 July 2023 / Online: 4 July 2023 (03:23:42 CEST)

How to cite: Longfei, Z.; Xiaogang, H.; Jinxin, M. A Novel Adsorbent Prepared by Aluminum-Containing Waste Residue and Its Application for Congo Red Wastewater Decolorization. Preprints 2023, 2023070091. https://doi.org/10.20944/preprints202307.0091.v1 Longfei, Z.; Xiaogang, H.; Jinxin, M. A Novel Adsorbent Prepared by Aluminum-Containing Waste Residue and Its Application for Congo Red Wastewater Decolorization. Preprints 2023, 2023070091. https://doi.org/10.20944/preprints202307.0091.v1

Abstract

Modified aluminum slag (MAS) was applied as an adsorbent for Congo red (CR) prepared by the hydrothermal treatment of Ca (OH) 2. At 25 ℃, with a MAS dosage of 0.3g, initial CR concentration of 100 mg/L and initial pH=5, and the adsorption time was 40 min, the CR removal efficiency was 98.41%. The adsorption trend of CR conformed to the second-order kinetics, and the adsorption isotherm follows the Freundlich isotherm model. Compared with RAS, MAS has a larger pore volume and specific surface area. The mechanism of action of MAS on CR was the interaction between membrane diffusion and internal diffusion, and the adsorption rate during the membrane diffusion was the fastest.

Keywords

modified; aluminum containing waste; Congo red; adsorption; wastewater

Subject

Chemistry and Materials Science, Applied Chemistry

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