Remarkable purification of organic dyes by NiOOH-modified industrial waste residues

• Published in: Journal of colloid and interface science 2024-06, Vol.664, p.136-145
• Main Authors: Xie, De-An, Sun, Yu, Yang, Yan-Ling, Shi, Xiao-Lei, Suo, Guoquan, Hou, Xiaojiang, Ye, Xiaohui, Zhang, Li, Chen, Zhi-Gang
• Format: Article
• Language: English
• Subjects: Adsorbent; adsorbents; adsorption; industrial wastes; NiOOH; Organic dye; porosity; Red mud; sewage; surface area; wastewater; wastewater treatment; Water pollution
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2024.02.190

[Display omitted] •A “Turning waste into treasure” strategy was proposed.•An efficient ARM/NiOOH adsorbent has been successfully prepared.•The adsorption kinetics model has been reasonably established.•348.0 mg g−1 congo red was adsorbed with a ∼ 100 % adsorption efficiency within 5 min. Extracting functional materials from industrial waste residues to absorb organic dyes can maximize waste reuse and minimize water pollution. However, the extraordinarily low purification efficiency still limits the practical application of this strategy. Herein, the lamellar NiOOH is in-situ anchored on the industrial waste red mud surface (ARM/NiOOH) as an adsorbent to purify organic dyes in wastewater. ARM/NiOOH adsorbent with high specific surface area and porosity provides considerable active sites for the congo red (CR), thereby significantly enhancing the removal efficiency of CR. Besides, we fit a reasonable adsorption model for ARM/NiOOH adsorbent and investigate its adsorption kinetics. Resultantly, ARM/NiOOH adsorbent can remarkably adsorb 348.0 mg g−1 CR within 5 min, which is 7.91 times that of raw RM. Our work provides a strategy for reusing industrial waste and purifying sewage pollution, which advances wastewater treatment engineering.