One-Step Functionalization of Chitosan Using Aromatic Groups via Hydrothermal Assisted Grafting for Removal of Reactive Orange 16 Dye: Optimization and Adsorption Mechanism

Nurul Izzati Normi; Ahmed Saud Abdulhameed; R. RazuanEmad YousifZeid A. ALOthmanLee D. WilsonAli H. Jawad

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One-Step Functionalization of Chitosan Using Aromatic Groups via Hydrothermal Assisted Grafting for Removal of Reactive Orange 16 Dye: Optimization and Adsorption Mechanism

机译：One-Step Functionalization of Chitosan Using Aromatic Groups via Hydrothermal Assisted Grafting for Removal of Reactive Orange 16 Dye: Optimization and Adsorption Mechanism

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Herein, the biopolymer chitosan (CHI) was functionalized by grafting aromatic groups (benzaldehyde, BZA) onto its backbone using a hydrothermal technique to create an efficient hydrothermally chitosan-benzaldehyde adsorbent (CHI-BZA). The characterization results revealed a mesoporous and crystalline structural features of the CHI-BZA, further supporting that the aromatic ring of BZA was successfully grafted onto CHI. The resulting CHI-BZA product was applied as a promising adsorbent to remove a model of acidic dye (reactive orange 16, RO16) from simulated wastewater. Optimizing the major adsorption factors (A: CHI-BZA dose (0.02-0.08 g); B: pH (4-10); C: time (5-25)) was accomplished by the Box-Behnken design (BBD). The Freundlich isotherm and pseudo-second-order kinetic models match the adsorption profile of RO16 species. The hydrothermally prepared CHI-BZA was found to possess a maximum adsorption capacity (q_(max)) of 228.9 mg/g for the RO16 dye. The adsorption of RO16 species onto the CHI-BZA surface is controlled by several types of interactions: electrostatic, n-π,π-π, and H-bonding. This work highlights that hydrothermally prepared CHI-BZA may serve as an efficient and promising adsorbent for the removal of acidic dyes from contaminated water.

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《Journal of polymers and the environment》 |2023年第4期|1292-1307|共16页
作者
Nurul Izzati Normi; Ahmed Saud Abdulhameed; R. RazuanEmad YousifZeid A. ALOthmanLee D. WilsonAli H. Jawad;
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Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia;

Department of Medical Instrumentation Engineering, Al-Mansour University College, Baghdad, Iraq, College of Engineering, University of Warith Al-Anbiyaa, Karbala, Iraq;

Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, IraqChemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Chemistry, University of Saskatchewan, 110 Science Place, Thorvaldson Building, Saskatoon, SK S7N 5C9, Canada;

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Grafted chitosan; Benzaldehyde; Adsorption; Reactive orange 16; Box-Behnken design;

One-Step Functionalization of Chitosan Using Aromatic Groups via Hydrothermal Assisted Grafting for Removal of Reactive Orange 16 Dye: Optimization and Adsorption Mechanism

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