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Journal of Polymers and the Environment

, Volume 26, Issue 9, pp 3981–3994 | Cite as

Radiation Crosslinking of Modifying Super Absorbent (Polyacrylamide/Gelatin) Hydrogel as Fertilizers Carrier and Soil Conditioner

  • Mohamed Mohamady Ghobashy
  • Basem Kh. El-Damhougy
  • Norhan Nady
  • H. Abd El-Wahab
  • A. M. Naser
  • Farag Abdelhai
Original Paper
  • 189 Downloads

Abstract

A novel approach is developed for preparing a highly porous super absorbent hydrogel (SAH). Synthetic and natural hydrogel based acrylamide (Am) and gelatin (G) were polymerized and crosslinked by gamma radiation. Three hydrogels compositions have been prepared in weight ratio 1:2, 1.5:1.5 and 2:1 (wt:wt) for 30% PAAM/G and exposed to gamma radiation at dose of 30 kGy. The effect of chemical modifications on increasing the swelling power of polyacrylamide gelatin (PAAM/G) has been evaluated. The alkaline hydrolysis of PAAM/G hydrogel with concentrated NaOH converts amid groups CONH2 to carboxylic groups COONa. The modified hydrogels will take the codes PAAM-COOH/G, PAAM-COONa/G and PAAM-COOK/G that dramatically increased the degree of swelling from 220 to 720 (g/g). Furthermore, studies on the slow release ability of three kinds of fertilizer (K, P and urea) loaded on modified PAAM-COOH/G and evaluated the ability of SAH hydrogels to absorb and then gradually release water and fertilizer. A mathematical model for fertilizer release from PAAM-COOK/G was applied to calculate the diffusion coefficient D. The main aim of this article is performed the effect of soil amendment with PAAM-COOK/G on eliminating water stress was tested for bean plant (Vicia faba) irrigation cycles in drought-prone environments. The growth of bean plant was monitored by measuring the highest and size of leaves and bean seed. The effect of water stress was monitored also, by measuring the intensity of chlorophyll for both SAH and control soil. The results indicated that the chemical modification of (PAAM/G) into (PAAM-COOK/G) could greatly improve water absorbency. The experimental data indicated that the SAH has a positive effect to use as fertilizers carrier and soil conditioner.

Keywords

Radiation crosslinking Chemical modification Super absorbent hydrogel Fertilizers carrier Soil conditioner Chlorophyll 

Notes

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Mohamed Mohamady Ghobashy
    • 1
  • Basem Kh. El-Damhougy
    • 2
  • Norhan Nady
    • 2
    • 3
  • H. Abd El-Wahab
    • 4
  • A. M. Naser
    • 4
  • Farag Abdelhai
    • 4
  1. 1.Radiation Research of Polymer DepartmentNational Center for Radiation Research and Technology (NCRRT), Atomic Energy AuthorityCairoEgypt
  2. 2.Polymeric Material Research DepartmentAdvanced Technology and New Materials Research Institute (ATNMRI)New Borg El-Arab City, AlexandriaEgypt
  3. 3.Chemical and Petrochemicals DepartmentEgypt-Japan University of Science and Technology (E-JUST)New Borg El-Arab City, AlexandriaEgypt
  4. 4.Department of Chemistry, Faculty of ScienceAl-Azher UniversityCairoEgypt

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