首页|Adsorption behavior of amine-modified cotton stalk extract on Congo red in aqueous solution

Adsorption behavior of amine-modified cotton stalk extract on Congo red in aqueous solution

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  • NETL
  • NSTL
  • Elsevier
© 2024Selective adsorbent materials for the remediation of printing and dyeing wastewater were successfully prepared from cotton stalks by sodium chlorite pretreatment and vinylamine modification. Its dye adsorption test showed that the cotton stalk-based adsorbent had a unique selective adsorption capacity for Congo red, and the maximum adsorption amount could reach 997.1 mg/g. It is worth noting that the environmental factors, such as pH value, salt ion concentration, and surfactant, had a small influence on the process. Exploring the adsorption mechanism, it was found that the process conformed to the quasi-secondary kinetic model (R2 > 0.99) and the Langmuir isotherm model (R2 > 0.99), in which electrostatic interactions, π-π, and hydrogen bonding played important roles in the adsorption process. Therefore, this environmentally friendly and efficient adsorbent has a broad application prospect in wastewater treatment.

Adsorption mechanismAzo dyeCotton strawOrganic acid extraction

Zhang Z.、Zhang C.、Liu G.、Lang D.、Wang L.、Yang C.、Fu J.、Wu R.、Wang W.

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Key Laboratory of Oil & Gas Fine Chemicals School of Chemical Engineering Xinjiang University

Center for Pharmacy University of Bergen||Key Laboratory of Oil & Gas Fine Chemicals School of Chemical Engineering Xinjiang UniversityKey Laboratory of Oil & Gas Fine Chemicals School of Chemical Engineering Xinjiang University||Institute of Chemistry University of Bergen||

2025

10.1016/j.reactfunctpolym.2024.106137

Reactive & functional polymers

Reactive & functional polymers

SCI
ISSN：1381-5148
年,卷(期)：2025.207(Feb.)
  • 52