Synthesis and Characterization of Phosphorus-Containing Sorbent for Basic Dye Removal
Monika Wawrzkiewicz1, Sławomir Frynas2, Beata Podkościelna3
1Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland.
Molecules (Basel, Switzerland)
|September 28, 2023
Summary
A novel phosphorus-based sorbent effectively removes cationic dyes like Basic Yellow 2 and Basic Blue 3, with adsorption kinetics following a pseudo-second-order model. Regeneration efficiency is limited, not exceeding 60%.
Area of Science:
- Materials Science
- Environmental Chemistry
- Polymer Chemistry
Background:
- Wastewater contamination by cationic dyes poses environmental and health risks.
- Developing efficient and cost-effective sorbent materials is crucial for dye removal.
- Phosphorus-containing polymers offer potential for enhanced adsorption properties.
Purpose of the Study:
- To synthesize and characterize a new phosphorus-containing sorbent.
- To evaluate the sorbent's efficiency in removing cationic dyes from aqueous solutions.
- To investigate the adsorption mechanism, kinetics, and regeneration capabilities.
Main Methods:
- Copolymerization of ethylene glycol dimethacrylate (EGDMA), trimethylvinyl silane (TMVS), and diphenylvinylphoshine oxide (DPVO) to create the sorbent.
- Batch adsorption experiments for removing C.I. Basic Yellow 2 (BY2), C.I. Basic Blue 3 (BB3), and C.I. Basic Red 46 (BR46).
- Adsorption isotherm (Langmuir, Freundlich, Temkin, D-R) and kinetic (pseudo-first-order, pseudo-second-order, intraparticle diffusion) modeling.
Main Results:
- Spectroscopic analysis confirmed the successful incorporation of phosphinoyl groups into the sorbent structure.
- The Freundlich model best described BB3 and BY2 adsorption, while the Langmuir model fit BR46 adsorption.
- Adsorption kinetics followed the pseudo-second-order model, indicating chemisorption as the rate-limiting step.
- Sorbent performance was negatively impacted by Na2SO4 and cationic surfactants.
- Regeneration efficiency was below 60% using common acidic and saline solutions with methanol.
Conclusions:
- The synthesized DPVO-EGDMA-TMVS sorbent demonstrates potential for cationic dye removal.
- Adsorption behavior is dye-specific, with different models providing the best fit.
- Further optimization is needed to improve regeneration efficiency for practical applications.
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