Iranian Polymer Journal

, Volume 28, Issue 10, pp 859–872 | Cite as

Modification of Fe2O3-contained lignocellulose nanocomposite with silane group to remove nitrate and bacterial contaminations from wastewater

  • Sara AbdolmalekiEmail author
  • S. Mojtaba Amininasab
  • Mohammad Ghadermazi
Original Research


Natural composite containing iron oxide in lignocellulose (L/IO) was obtained from an extract of apricot tree wood by heating it in a wood coal furnace. This method provided a facile, “green” pathway for the fabrication of magnetic carbon substrate without using chemical reactions. Ion exchange technology was used to remove the nitrate using (L/IO) modified with 3-chloropropyltrimethoxysilane and 1,4-diazabicyclo[2.2.2]octane (Dabco) (ML/IO). The physicochemical properties were characterized by field emission scanning electron micrographs (FESEM), energy-dispersive X-ray analysis (EDX), alternating gradient force magnetometer (AGFM), thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectra for both (L/IO) and (ML/IO) as adsorbents. Preliminary experiments indicated less favorability of (L/IO) in removing nitrate from water compared to (ML/IO). Batch adsorption experiments were performed and the effects of pH, contact time, adsorbent dosage, initial nitrate concentration (Ci), temperature and competing anions were assayed on nitrate adsorption by (ML/IO). The obtained data were modeled using four kinetic models including the pseudo-first order (PFO), pseudo-second order (PSO), Weber–Morris and Elovich. The best fit of experimental adsorption data was exhibited by means of the pseudo-second-order model (R2 0.99). Also, the equilibrium data were fitted to the Langmuir, Freundlich, Temkin, Redlich–Peterson isotherm equations and the favorable fit exhibited with two Langmuir and Redlich–Peterson isotherms (R2 0.98). Finally, the desorption and regeneration studies showed a promising reusability of the (ML/IO). Antimicrobial activities of both (L/IO) and (ML/IO) were investigated by disc diffusion method against two Gram-positive bacteria, namely S. aureus and B. cereus, and four Gram-negative bacteria, namely E. coli, K. pneumoniae, P. aeruginosa and S. typhi, and two fungi, namely Aspergillus niger and Saccharomyces cerevisiae, in vitro. The antimicrobial effects were more prominent in all cases for (ML/IO) compared to (L/IO). The investigations confirmed that (ML/IO) was more active against Gram-negative (IZD 8–19 mm) than Gram-positive (IZD 6–8 mm) bacteria. The highest antibacterial activity of (ML/IO) was exhibited against E. coli with IZD value of 19 mm.


Iron oxide-loaded lignocellulose 3-Chloropropyltrimethoxysilane Pseudo-second-order kinetic model Antimicrobial activities Disc diffusion method 



The authors gratefully acknowledge the Research Council of Kermanshah University of Medical Sciences (Grant Number: 97864) for the financial support.

Supplementary material

13726_2019_749_MOESM1_ESM.docx (32 kb)
Supplementary material 1 (DOCX 31 kb)


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Copyright information

© Iran Polymer and Petrochemical Institute 2019

Authors and Affiliations

  • Sara Abdolmaleki
    • 1
    Email author
  • S. Mojtaba Amininasab
    • 2
  • Mohammad Ghadermazi
    • 2
  1. 1.Nano Drug Delivery Research Center, Health Technology InstituteKermanshah University of Medical SciencesKermanshahIran
  2. 2.Department of Chemistry, Faculty of ScienceUniversity of KurdistanSanandajIran

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