Highly efficient adsorption of direct Scarlet dye using guanidinium-based covalent organic polymer DOI Creative Commons
Narges Abdolhossein Rejali, Mohammad Dinari

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 21, 2025

Ionic covalent organic polymers are promising water pollutant adsorbents with enhanced adsorption potential compared to their neutral counterparts benefiting from both electrostatic attractions and the ion-exchange process. This work deals construction of a cationic COP through facile direct approach assessment its performance for scavenging Direct Scarlet 4BS (DS-4BS) anionic dye. Many analytical techniques including FT-IR, TGA, BET, XRD, zeta potential, FE-SEM/EDS were conducted validate this polymer formation. As results revealed maximum capacity (qmax) was obtained 236.4 mg/g under pH = 2, adsorbent quantity 0.005 g, dye concentration 250 ppm, time 3.5 h. Based on regression coefficient (R2) values, experimental data suitably matched Langmuir model, indicating monolayer best-fitted kinetics model pseudo-second-order. Also, according calculated energy (Ea 4.5 kJ/mol), mechanism mainly governed by physisorption Additionally, thermodynamic investigations that negative values standard free Gibb's (∆G0), process is spontaneous. positive value enthalpy (∆H0 38.5 kJ/mol) indicated endothermic nature adsorption, which means increases increase in temperature.

Language: Английский

A Sustainable and Cost-Effective Approach for Efficient removal of Direct Blue-14 azo dye from Wastewater Using North American Zeolite for developing countries DOI
Eman A. Alabbad, Rabia Rehman,

Muhammad Sadiq Hussain

et al.

Physics and Chemistry of the Earth Parts A/B/C, Journal Year: 2025, Volume and Issue: unknown, P. 103888 - 103888

Published: Feb. 1, 2025

Language: Английский

Citations

0
Highly efficient adsorption of direct Scarlet dye using guanidinium-based covalent organic polymer DOI Creative Commons
Narges Abdolhossein Rejali, Mohammad Dinari

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 21, 2025

Ionic covalent organic polymers are promising water pollutant adsorbents with enhanced adsorption potential compared to their neutral counterparts benefiting from both electrostatic attractions and the ion-exchange process. This work deals construction of a cationic COP through facile direct approach assessment its performance for scavenging Direct Scarlet 4BS (DS-4BS) anionic dye. Many analytical techniques including FT-IR, TGA, BET, XRD, zeta potential, FE-SEM/EDS were conducted validate this polymer formation. As results revealed maximum capacity (qmax) was obtained 236.4 mg/g under pH = 2, adsorbent quantity 0.005 g, dye concentration 250 ppm, time 3.5 h. Based on regression coefficient (R2) values, experimental data suitably matched Langmuir model, indicating monolayer best-fitted kinetics model pseudo-second-order. Also, according calculated energy (Ea 4.5 kJ/mol), mechanism mainly governed by physisorption Additionally, thermodynamic investigations that negative values standard free Gibb's (∆G0), process is spontaneous. positive value enthalpy (∆H0 38.5 kJ/mol) indicated endothermic nature adsorption, which means increases increase in temperature.

Language: Английский

Citations

0