A dipeptide-based superhydrogel: Removal of toxic dyes and heavy metal ions from waste water

Nandi, Nibedita ; Baral, Abhishek ; Basu, Kingshuk ; Roy, Subhasish ; Banerjee, Arindam (2017) A dipeptide-based superhydrogel: Removal of toxic dyes and heavy metal ions from waste water Biopolymers, 108 (1). e22915. ISSN 0006-3525

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Official URL: http://doi.org/10.1002/bip.22915

Related URL: http://dx.doi.org/10.1002/bip.22915

Abstract

A short peptide-based molecule has been found to form a strong hydrogel at phosphate buffer solution of pH 7.46. The hydrogel has been characterized thoroughly using various techniques including field emission scanning electron microscopy (FE-SEM), wide angle powder X-ray diffraction (PXRD), and rheological analysis. It has been observed from FE-SEM images that entangled nanofiber network is responsible for gelation. Rheological investigation demonstrates that the self-assembly of this synthetic dipeptide results in the formation of mechanically strong hydrogel with storage modulus (G′) around 104 Pa. This gel has been used for removing both cationic and anionic toxic organic dyes (Brilliant Blue, Congo red, Malachite Green, Rhodamine B) and metal ions (Co2+ and Ni2+) from waste water. Moreover, only a small amount of the gelator is required (less than 1 mg/mL) for preparation of this superhydrogel and even this hydrogel can be reused three times for dye/metal ion absorption. This signifies the importance of the hydrogel towards waste water management.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons, Inc.
ID Code:129446
Deposited On:16 Nov 2022 09:48
Last Modified:16 Nov 2022 09:48

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