Rapid, Highly-Efficient and Selective Removal of Anionic and Cationic Dyes from Wastewater Using Hollow Polyelectrolyte Microcapsules

Herein, poly (allylamine hydrochloride) (PAH)/ poly (styrene sulfonic acid) sodium salt (PSS) microcapsules of (PAH/PSS) PAH (P2P MCs) and (PAH/PSS) (P2 MCs) were obtained by a layer-by-layer method. The P2 MCs show high adsorption capacity for Rhodamine B (642.26 mg/g) and methylene blue (909.25 mg...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2023-03, Vol.28 (7), p.3010
Main Authors: Zhao, Zhiqi, Zhou, Hongbing, Han, Xu, Han, Lun, Xu, Zhenzhen, Wang, Peng
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Analysis
Cationic dyes
Color removal
Composition
Contamination
Dye industry wastes
Dyes
dyes removal
fast adsorption
high adsorption capacity
Methods
Methylene blue
Microencapsulation
Morphology
polyelectrolyte microcapsule
Polyelectrolytes
Porous materials
Rhodamine
Sodium salts
Styrene
Sulfonic acid
Wastewater
Water treatment
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Summary:Herein, poly (allylamine hydrochloride) (PAH)/ poly (styrene sulfonic acid) sodium salt (PSS) microcapsules of (PAH/PSS) PAH (P2P MCs) and (PAH/PSS) (P2 MCs) were obtained by a layer-by-layer method. The P2 MCs show high adsorption capacity for Rhodamine B (642.26 mg/g) and methylene blue (909.25 mg/g), with an extremely low equilibrium adsorption time (~20 min). The P2P MCs exhibited high adsorption capacities of reactive orange K-G (ROKG) and direct yellow 5G (DY5G) which were 404.79 and 451.56 mg/g. Adsorption processes of all dyes onto microcapsules were best described by the Langmuir isotherm model and a pseudo-second-order kinetic model. In addition, the P2P MCs loaded with reactive dyes (P2P-ROKG), could further adsorb rhodamine B (RhB) dye, and P2 MCs that had adsorbed cationic MB dyes could also be used for secondary adsorption treatment of direct dye waste-water, respectively. The present work confirmed that P2P and P2 MCs were expected to become an excellent adsorbent in the water treatment industry.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules28073010