A Study on the Correlation Between Adsorption and Swelling for Poly(Hydroxamic Acid) Hydrogels-Triarylmethane Dyes Systems
The influence of crosslinker and dye type on the swelling and adsorption characteristics of poly(hydroxamic acid) (PHA) hydrogels have been investigated. PHA hydrogels with crosslinker such as N,N′-methylenebisacrylamide or ethylene glycol dimethacrylate were used in experiments on swelling, diffusion and adsorption of the triarylmethane dye such as Malachite Green, Methyl Violet 6B and Crystal Violet. The equilibrium swelling (Se) values of PHA hydrogels in the dye solutions were calculated as 2.26–21.57 g g−1. Some swelling, swelling kinetics, diffusional behavior and diffusional kinetics parameters were found. Diffusional behavior of the triarylmethane dye solutions was investigated. Diffusion behavior analyses determined that dye solution diffusion into hydrogels followed the anomalous Fickian behavior. It was observed that swelling characteristics of hydrogels are highly affected by the by the crosslinker type. Sorption of the triarylmethane dyes onto PHA hydrogels were studied by batch sorption technique at 25 °C. PHA hydrogels in the triarylmethane dye solutions showed the dark coloration. In the experiments of the adsorption, S type adsorption in the Giles classification system were found with an adsorption mechanism well represented by the Freundlich model. It has been found that there is an increasing linear correlation between swelling and adsorption values. The adsorbed amounts of the dyes by PHA–EGM hydrogels were very high (95% of the total concentration of the dyes), whereas the dyes were adsorbed in smaller (77%) amounts by PHA–NBis hydrogels. At the end of this study, it can be said that PHA hydrogels may be used a sorbent for removal of some agents (such as organic molecules) and dye molecules.
KeywordsHydrogel Poly(hydroxamic acid) Triarylmethane dye Swelling Adsorption
The authors were financially supported by grants supported the Scientific Research Project Unit in Cumhuriyet University (F-037).
Compliance with Ethical Standards
Conflict of interest
None of the authors has any financial interest related to this study to disclose.
- 1.Nagam SP, Jyothi AN, Poojitha J, Aruna S, Nadendla RR (2016) Int J Curr Pharm Res 8(1):19–23Google Scholar
- 3.Morkhande VK, Pentewar RS, Gapat SV, Sayyad SR, Duve Amol B, Sachin B, Sandip K (2016) Pharm Res 6(3):4678–4689Google Scholar
- 4.Saini K (2017) PharmaTutor 5(1):27–36Google Scholar
- 5.Mishra SB, Mishra AK (2016) Polymeric hydrogels: a review of recent developments In: Kalia S (eds) Polymeric hydrogels as smart biomaterials. Springer, Switzerland, pp 1–17Google Scholar
- 6.Muya FN, Sunday CE, Baker P, Iwuoha E (2016) Water Sci Technol 73(5):983–992Google Scholar
- 11.Saraydın D, Karadağ E (2016) Radiation induced hydrogels: acrylamide/itaconic acid and acrylamide/maleic acid copolymers for adsorption of heavy metal ions. In: Méndez-Vilas A, Solano A (eds) Dyes and biomolecules in polymer science: research advances, practical applications and educational aspects. Formatex Research Center, Badajoz, Spain, pp 448–460Google Scholar
- 14.Sayed WM, Abed YM, Gad ESA, Salem TA (1998) Monat Chem/Chem Mon 129(3):245–252Google Scholar
- 17.Hosseini HS, Entezarni AA (1995) Iran J Polym Sci Technol 4:84–88Google Scholar
- 24.Sadeghi M, Koutchakzadeh G (2007) J Sci IAU 17(64):19–26Google Scholar
- 25.Sadeghi M, Yarahmadi M (2011) Asian J Chem 23(12):5225–5228Google Scholar
- 26.Bamgbose JT, Bamigbade AA, Adewuyi S, Dare EO, Lasisi AA, Njah AN (2012) J Chem Chem Eng 6(3):272–283Google Scholar
- 30.Sposito G (2016) The surface chemistry of soils, 3rd edn. Oxford University Press, New York, p 272Google Scholar