Details

Autor(en) / Beteiligte

• Zhang, Tao
• Wan, Xin
• Chen, Hui
• Luo, Jiaqi
• Ran, Yi
• Xie, Lingying
• Li, Yan
• Zhang, Yue-Fei

Titel

Incorporation of copper ion promoted adsorption of anionic dye (Acid Yellow 36) by acrolein-crosslinked polyethyleneimine/chitosan hydrogel: Adsorption, dynamics, and mechanisms

Ist Teil von

• International journal of biological macromolecules, 2024-08, Vol.274 (Pt 1), p.133281, Article 133281

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2024

Quelle

MEDLINE

Beschreibungen/Notizen

• In this study, a novel adsorbent, A-PEI/CS-Cu2+, was developed by crosslinking polyethyleneimine/chitosan hydrogel with acrolein and loading it with copper ions. The adsorption process of A-PEI/CS-Cu2+ on the anionic dye acid yellow 36 (AY36) was investigated by kinetic, isothermal and thermodynamic modeling. It was noteworthy that A-PEI/CS-Cu2+ exhibited rapid adsorption with a 90 % removal rate achieved within just 5 min, which was much faster than the adsorption rate of A-PEI/CS without load of copper ions and showed its potential for rapid adsorption applications. The maximum adsorption capacity for AY36 could reach up to 3114 mg g−1. In addition, the high concentration of saline wastewater was found to have almost no effect on the adsorption reaction in the salt effect test experiment. In five desorption-regeneration cycle experiments, the sample exhibited good recyclability and regeneration performance. The driving force of the adsorption process mainly originated from the electrostatic interaction, hydrogen bonding, and intermolecular interaction, in which the addition of copper ions led to the enhancement of the electrostatic interaction and chelation between A-PEI/CS-Cu2+ and AY36. Overall, the findings suggest the excellent potential of A-PEI/CS-Cu2+ for rapid and efficient adsorption, as well as its suitability for practical applications in wastewater treatment. [Display omitted] •A facile-preparation A-PEI/CS-Cu2+ adsorbent was studied to recover AY36.•The removal rate of AY36 could be up to 90 % within 5 min.•Cu(II) could enhance the adsorption of A-PEI/CS to adsorb AY36.•The copper bridge enhanced the electrostatic and chelation interaction.•A-PEI/CS-Cu2+ could be applied in rapid and efficient adsorption with good reusability.