Multifunctional amphoteric resin to remove both anionic and cationic dyes from aqueous solution

Coşkun, Ramazan; Öncel, K; Akköz, Yasin

doi:10.1002/app.51283

Cited by 8 publications

(1 citation statement)

References 70 publications

(72 reference statements)

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“…This phenomenon is attributed to the increase of surface charge density with increasing pH (2-12). The consequence is a strengthened electrostatic attraction between the positively charged dye (MB) and the negatively charged membrane surface, resulting in an increased adsorption capacity (Coşkun et al, 2021). The alteration in pH levels exerts an influence on both the ionization of functional groups on the membrane surface and the ionization of MB dye molecules.…”

Section: Effect Of Ph and Phpzc On Mb Removalmentioning

confidence: 99%

Fabrication of cellulose nanocrystals/carboxymethyl cellulose/zeolite membranes for methylene blue dye removal: understanding factors, adsorption kinetics, and thermodynamic isotherms

Ibrahim,

Salama,

Zahran

et al. 2024

Front. Chem.

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This study introduces environmentally-friendly nanocellulose-based membranes for AZO dye (methylene blue, MB) removal from wastewater. These membranes, made of cellulose nanocrystals (CNCs), carboxymethyl cellulose (CMC), zeolite, and citric acid, aim to offer eco-friendly water treatment solutions. CNCs, obtained from sugarcane bagasse, act as the foundational material for the membranes. The study aims to investigate both the composition of the membranes (CMC/CNC/zeolite/citric acid) and the critical adsorption factors (initial MB concentration, contact time, temperature, and pH) that impact the removal of the dye. After systematic experimentation, the optimal membrane composition is identified as 60% CNC, 15% CMC, 20% zeolites, and 5% citric acid. This composition achieved a 79.9% dye removal efficiency and a 38.3 mg/g adsorption capacity at pH 7. The optimized membrane exhibited enhanced MB dye removal under specific conditions, including a 50 mg adsorbent mass, 50 ppm dye concentration, 50 mL solution volume, 120-min contact time, and a temperature of 25°C. Increasing pH from neutral to alkaline enhances MB dye removal efficiency from 79.9% to 94.5%, with the adsorption capacity rising from 38.3 mg/g to 76.5 mg/g. The study extended to study the MB adsorption mechanisms, revealing the chemisorption of MB dye with pseudo-second-order kinetics. Chemical thermodynamic experiments determine the Freundlich isotherm as the apt model for MB dye adsorption on the membrane surface. In conclusion, this study successfully develops nanocellulose-based membranes for efficient AZO dye removal, contributing to sustainable water treatment technologies and environmental preservation efforts.

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Section: Effect Of Ph and Phpzc On Mb Removalmentioning

confidence: 99%

Fabrication of cellulose nanocrystals/carboxymethyl cellulose/zeolite membranes for methylene blue dye removal: understanding factors, adsorption kinetics, and thermodynamic isotherms

Ibrahim,

Salama,

Zahran

et al. 2024

Front. Chem.

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Comparative study on the adsorption characteristics of a triazine‐Si hybrid polymer adsorbent and the natural adsorbents for removal of methylene blue from industrial wastewaters

Zargoosh

Ashrafzade

Afshari

et al. 2022

J of Applied Polymer Sci

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This work aims to compare the practical ability of the novel triazine‐based polymer adsorbents (TBPA‐Si hybrid polymer) with those of the natural adsorbents for the adsorption of methylene blue (MB) from the industrial wastewaters. In this regard, a new TBPA‐Si hybrid polymer includes SH, NH, and aromatic ring functional groups for effective interactions with a wide range of organic pollutants was synthesized. In addition, pine leaves, soybean meal (SBM), and wheat bran were selected as representative of the well‐known natural adsorbents. The optimum pH values for natural adsorbents and TBPA‐Si for MB adsorption were 7 and 8, respectively. The optimum time for wheat bran and TBPA‐Si to reach the maximum MB adsorption was 15 min and for pine leaves and SBM was 5 min. The isotherm data for TBPA‐Si hybrid was well fitted to Langmuir isotherm. Pine leaves showed a mix of Langmuir and Temkin isotherms. In addition, SBM and wheat bran also showed Temkin isotherm. During the kinetics investigations, the pseudo‐second‐order kinetics models were observed for all adsorbents. The maximum adsorption capacities for TBPA‐Si and pine leaves were 15.3 and 32.1 mg.g−1, respectively. The empirical adsorption capacity for SBM and wheat brans were 71.6 and 38.3 mg.g−1, respectively. The key advantage of the TBPA‐Si is its ability for removing MB in the presence of high concentrations of electrolytes, where the removal efficiencies of the natural adsorbent were extremely reduced in these conditions. The main advantage of the natural adsorbents is their low cost for removal of MB from the effluents containing very low concentration of electrolytes.

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Laponite-AMPS/AA composite hydrogels for efficient removal of methylene blue (MB)

et al. 2021

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Multifunctional amphoteric resin to remove both anionic and cationic dyes from aqueous solution

Cited by 8 publications

References 70 publications

Fabrication of cellulose nanocrystals/carboxymethyl cellulose/zeolite membranes for methylene blue dye removal: understanding factors, adsorption kinetics, and thermodynamic isotherms

Fabrication of cellulose nanocrystals/carboxymethyl cellulose/zeolite membranes for methylene blue dye removal: understanding factors, adsorption kinetics, and thermodynamic isotherms

Comparative study on the adsorption characteristics of a triazine‐Si hybrid polymer adsorbent and the natural adsorbents for removal of methylene blue from industrial wastewaters

Laponite-AMPS/AA composite hydrogels for efficient removal of methylene blue (MB)

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