Swelling and kinetic investigations of basic blue-3 sorption by polyacrylamide/Gum Arabic hybrid hydrogel in aqueous medium

Uzma; Sultan Alam; Hanif Subhan; Luqman Ali Shah; Noor Saeed Khattak

doi:10.1515/zpch-2020-1808

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Swelling and kinetic investigations of basic blue-3 sorption by polyacrylamide/Gum Arabic hybrid hydrogel in aqueous medium

Uzma , Sultan Alam , Hanif Subhan , Luqman Ali Shah und Noor Saeed Khattak

Veröffentlicht/Copyright: 3. September 2021

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Aus der Zeitschrift Zeitschrift für Physikalische Chemie Band 236 Heft 2

Abstract

Removal of noxious dyes from waste water is highly desirable for the safety of humans, aquatic life and natural environment. The issue was addressed in the present work by one pot fabrication of polyacrylamide/Gum Arabic (pAAm/GA) composite hydrogel which was applied as sorbent for basic blue-3 (BB3) eradication. The synthesis of the material was confirmed by scanning electron microscopy (SEM), Fourier Transformed Infrared (FTIR) spectroscopy and thermo gravimetric analysis (TGA). Besides, the same techniques also evidenced BB3 uptake by the hydrogel. In distilled water, the swelling capacities of the hydrogel was investigated at pH 7 and the nature of water diffusion into the hydrogel was probed from the resultant data. The composite hydrogel reached equilibrium point in 24 h after which no appreciable water absorption occurred. The adsorption of BB3 by the hybrid material was comprehensively investigated which involved the effect of contact time, temperature and pH on the sorption capacity of the hybrid sorbent. The obtained data fitted well into pseudo second order kinetic model and the adsorption took place in three consecutive kinetic phases. Moreover, sorption thermodynamics revealed non spontaneous and endothermic nature of BB3 sorption accompanied with increase in degree of order.

Keywords: composite hydrogel; pollutants; purification; sorption capacity; swelling capacity

Corresponding author: Luqman Ali Shah, Polymer Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan, E-mail: Luqman_alisha@uop.edu.pk

Funding source: Higher Education Commision, Pakistan

Award Identifier / Grant number: NRPU-HEC-7309

Acknowledgment

Higher Education Commission (HEC) of Pakistan is gratefully acknowledged for financial support under research grant No: NRPU-HEC-7309.

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was supported by Higher Education Commission (HEC) of Pakistan (NRPU-HEC-7309).
Conflict of interest statement: No conflict of interest exist to declare.

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Received: 2020-12-13

Accepted: 2021-08-25

Published Online: 2021-09-03

Published in Print: 2022-02-23

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Artikel in diesem Heft

https://doi.org/10.1515/zpch-2020-1808

Schlagwörter für diesen Artikel

composite hydrogel; pollutants; purification; sorption capacity; swelling capacity