We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Adsorptive Removal of Methylene Blue Dye Using Biodegradable Superabsorbent Hydrogel Polymer Composite Incorporated with Activated Charcoal.
- Authors
Shah, Syed Sikandar; Ramos, Bruno; Teixeira, Antonio Carlos Silva Costa
- Abstract
Hydrogels have attracted great attention as good adsorbents due to their extraordinary water retention capacity, unique hydrophilic nature, biocompatibility, and abundance in availability. In this work, a superabsorbent polymer (SAP) hydrogel and its composite were synthesized, with the introduction of activated charcoal (SAP-AC) for deep removal of the ecotoxic organic dye methylene blue (MB). The formation of the hydrogel was confirmed by FTIR analysis, and scanning electron microscopy (SEM) revealed the appearance of a porous microstructure due to the incorporation of AC. A continuous upflow column was set up, and the adsorption parameters were optimized using an experimental Doehlert uniform array design. The residual concentration of MB was analyzed by UV-Vis spectrophotometry at 665 nm (λmax). The experimental data were also discussed in terms of adsorption kinetics and adsorption isotherm models. Accordingly, MB adsorption followed pseudo second-order kinetics and better fits the Freundlich isotherm, suggesting a chemisorption mechanism and a multilayer MB adsorption system. The maximum adsorption capacity was 202.84 mg g−1 (96.96%) using the SAP and 213.2 mg g−1 (99.48%) using the SAP-AC. The present study proved that the synthesized composite hydrogel has good activity and selectivity for deep removal of the MB dye and can be effectively used in wastewater treatment.
- Subjects
SUPERABSORBENT polymers; ACTIVATED carbon; METHYLENE blue; ADSORPTION kinetics; ADSORPTION isotherms; ADSORPTION capacity; ORGANIC dyes
- Publication
Water (20734441), 2022, Vol 14, Issue 20, pN.PAG
- ISSN
2073-4441
- Publication type
Article
- DOI
10.3390/w14203313