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Alginate/PVP/Pomegranate Seed Hydrogels as Bio-sorbents of Water Pollutants

Hashemzadeh, Payam | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55621 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Frounchi, Masoud; Mollaabasi, Payam
  7. Abstract:
  8. In the past decades, hydrogels have been used as an adsorbent with high potential to remove pollutants in water. Hydrogels are three-dimensional polymer networks that have the ability to absorb and store water and water-soluble compounds due to the presence of hydrophilic functional groups in their structure. Different particles with unique characteristics can be used to increase the efficiency of hydrogel absorption. Based on the type of pollutant, hydrogels are divided into three different forms, including particles, films and nanocomposites. In this research, the absorption effect of metal cations as well as the absorption kinetics of polyvinyl pyrrolidine-based hydrogels, sodium alginate, which has been synthesized through calcium chloride cross-linker and creating a physical network, along with pomegranate seed powder as nano The particle that is added in order to improve and increase the pollutant absorption capacity is discussed. The parameters affecting absorption including solution pH, nanoparticle weight percentage and contact time were investigated and the effect of changing each parameter along with the appropriate and optimal value of that parameter was obtained. Also, spectrophotometric analyzes were used to check the amount of absorption, Fourier transform infrared spectroscopy test to check the hydrogel structure and scanning electron microscope test to check the porosity of the hydrogel surface. The obtained results showed that these hydrogels follow the Langmuir isotherm and second-order kinetic model. Also, the addition of pomegranate seed powder nanoparticles increased the surface porosity and pollutant absorption
  9. Keywords:
  10. Hydrogel ; Sodium Alginate ; Polyvinylpyrolidon ; Water Treatment ; Pollution Removal ; Pomegranate Seed

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