Journal of Polymers and the Environment

, Volume 26, Issue 5, pp 2018–2029 | Cite as

Efficient Retention of Chromate from Industrial Wastewater onto a Green Magnetic Polymer Based on Shrimp Peels

  • Khalid Z. Elwakeel
  • Abdullah S. Al-Bogami
  • Ahmed M. Elgarahy
Original Paper


Magnetic chitosan grafted with Schiff’s base polymer (M-Schiff’s-Chit) was prepared as a green sorbent starting from shrimp peels for the effective removal of hexavalent chromium. Chitosan extraction involved three main stages as preconditioning, demineralization deproteinization and deacetylation. The grafting process is confirmed by elemental analysis, Fourier transform infrared spectroscopy. Adsorption experiments were carried out in batch sorption mode to investigate the effect of pH, contact time, sorbent dose, concentration of Cr(VI) and evaluating the thermodynamics. Sorption kinetics are effectively modeled using the pseudo-second order rate equation while Langmuir equation successfully fits sorption isotherms. The sorption is endothermic, spontaneous and entropic. Chromate desorption can be successfully performed with 2 M of NaCl in 0.5 M NaOH and the sorbent can be recycled for at least three sorption/desorption cycles without significant loss in sorption/desorption performances. Furthermore, the environmentally friendly and low-cost M-Schiff’s-Chit could be applied as an effective sorbent to remediate Cr(VI) contamination from tannery effluent.


Chromium(VI) Sorption/desorption Schiff’s base chitosan Sorption isotherm Competitive sorption 

Supplementary material

10924_2017_1096_MOESM1_ESM.docx (97 kb)
Supplementary material 1 (DOCX 96 KB)


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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Chemistry Department, Faculty of ScienceUniversity of JeddahJeddahSaudi Arabia
  2. 2.Environmental Science Department, Faculty of SciencePort-Said UniversityPort-SaidEgypt

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