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- Title
Enhanced adsorption of quinoline from aqueous solution by NaOH-treated biochar derived from orange peel: preparation, performance, mechanism, and density functional theory study.
- Authors
Yiwei Cao; Dongyan Xu
- Abstract
Low-cost biochar with a large surface area and enriched oxygen functional groups was prepared by pyrolysis of orange peel and post-NaOH modification. The modified orange peel-based bio-char (MOPBC) was examined for its performance in removing quinoline from aqueous solution by adsorption. As high as 197.53 mg/g of adsorption capacity of MOPBC for quinoline was achieved. The quinoline adsorption on MOPBC conforms to the pseudo-second-order kinetic model, well-fitted with the Freundlich isotherm model. Moreover, density functional theory calculation results show that quinoline is more readily adsorbed on oxygen-containing functional groups on the surface of MOPBC, especially hydroxyl groups. The plausible chemisorption mechanisms involve hydrogen bonding, acid-base interaction, π-π, and n-π interactions. This study proves that modified biochar is a prospective adsorbent concerning the disposal of quinoline in wastewater.
- Subjects
ORANGE peel; DENSITY functional theory; QUINOLINE; AQUEOUS solutions; BIOCHAR
- Publication
Desalination & Water Treatment, 2023, Vol 316, p306
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2023.30197