Cyanoguanidine-Modified Chitosan as an Efficacious Adsorbent for Removing Cupric Ions from Aquatic Solutions: Kinetics, Isotherms, and Mechanisms

Inorganics, Год журнала: 2025, Номер 13(4), С. 116 - 116

Опубликована: Апрель 6, 2025

One of the most critical environmental needs is to remove metal ions from industrial wastewater. In this investigation, chitosan modified by cyanoguanidine (CCs) was employed for first time adsorb cupric ions. The optimal conditions eliminating were adsorbent dose = 0.015 g, ion concentration 0.2 g L−1, pH 6, and temperature 25 °C. adsorption kinetics fit pseudo-second-order model, showing a value correlation coefficient (R2) 1.00, which highest. experimental qe determined be 99.05 mg g−1, comparable 100 g−1 (the theoretical one). adsorbent’s removal efficacy 96.05%, isotherms, conform Freundlich show that multi-layered homogeneous. chemosorption physisorption processes are major factors in elimination copper Therefore, good approach generate an appropriate efficient adsorbent, alternative elimination, incorporate cyanoguanidine, possesses additional binding sites between chains. Further, mechanism Cu2+ onto CCs proposed on basis FTIR analysis computational studies.

Язык: Английский

Design, Synthesis, and Characterization of Novel Pyrazole Cross-Linked Chitosan Derivatives Modified with Zinc Oxide Nanoparticles for Boosting Their Anticancer Activity

Polymers, Год журнала: 2025, Номер 17(8), С. 1061 - 1061

Опубликована: Апрель 15, 2025

A new series of chitosan-based pyrazole derivatives was successfully prepared via crosslinking chitosan using either malonopyrazole (MPy-Cs) or thiopyrazole (TPy-Cs). Three TPy-Cs were produced based on their content TPy, namely TPy-Cs1, TPy-Cs2, and TPy-Cs3 degrees 71, 48, 29%, respectively. Further, various weight ratios ZnO nanoparticles loaded into some these to obtain the corresponding ZnONP bio-composites. FTIR, XRD, SEM, TEM techniques employed emphasize chemical, internal, morphological structure derivatives. Although MPy-Cs did not show any activity against all examined cancer cell lines, exhibited an appreciable anticancer which greatly improved with increasing TPy content, i.e., from TPy-Cs1. The TPy-Cs1 displayed IC50 (14.4 μg/mL) HN9 line that comparable Doxorubicin (DOX) standard drug (12.6 μg/mL). Among composites, TPy-Cs3/ZnONPs-5% most potent candidate tested although it does exceed DOX. Tpy-Cs2 its composites safe normal human skin fibroblast (HSF) lines. Thus, inclusion both ZnONPs matrix fostered efficiency.

Язык: Английский

Effective Removal of Cu(II) Ions from Aqueous Solution by Cross-Linked Chitosan-Based Hydrogels

Water, Год журнала: 2024, Номер 16(16), С. 2324 - 2324

Опубликована: Авг. 18, 2024

The elimination of metal ions from industrial waste water is one the most significant environmental needs. For first time, two chitosan hydrogels that we had previously synthesized, cross-linked with varying concentrations trimellitic anhydride isothiocyanate (represented by H1 and H2), were utilized in this investigation to adsorb Cu(II) ions. We found pH 6, 25 °C, 200 mg L−1 concentration, 15 hydrogel dosage ideal parameters for ion elimination. kinetics their adsorption fitted pseudo-second-order model highest correlation coefficient (R2) values equal 0.999 1.00 H2, respectively. experimental qe when was 97.59 g−1 (theoretical value 98.04 g−1) H2 96.20 99.01 g−1). achieved a removal effectiveness 97.59% isotherms matched Freundlich model, indicating multi-layered homogeneous nature. copper significantly driven physisorption phenomenon. have great possibility be as promising, efficacious, reusable adsorbents wastewater remediation. Thus, incorporation cross-linker, containing binding centers ions, between chains good way obtain suitable efficient which are choices application field

Язык: Английский