Capture and Removal of Heavy Metals from an Aqueous Media by Polymeric Adsorption


  • Rafia Sharif International University of Africa, GHJ9+933, Madani St, Khartoum 12223,Khartoum ,Sudan
  • Prof. Azhari Hamid Nour International University of Africa, GHJ9+933, Madani St, Khartoum 12223,Khartoum ,Sudan
  • Dr. Issa Ismail Mohammed Ahmed


Bio-based Composite, Cross linker, Chitosan/CMC, Citric Acid, Langmuir-Freundlich Adsorption isotherm


In the present study, a bio-based composite was prepared by reacting chitosan and carboxymethyl cellulose (CMC) with citric acid (CA) and its ability to remove heavy metals [Cr (VI), Pb (II), Ni (II), Zn (II), Cu (II)] from an aqueous media were investigated. The best removal efficiency of heavy metals was noticed for the bio-based composite which were characterized by Fourier-transform Infrared Spectroscopy (FT-IR), Scanning electron microscopy (SEM) and Thermo gravimetric analysis (TGA). The effects of pH, contact time and the initial concentrations of chromium (IV), copper (II), lead (II), nickel (II) and zinc (II) on adsorption process were studied. The optimum conditions for the adsorption of heavy metals on chitosan/CMC bio-based composites were found between pH 2-6 and a contact time between 5-10 mints and initial concentration between 50-70 ppm. The FT-IR spectrum of chitosan/CMC with CA composite was clearly shown the presence of a peak at 1736 cm-1 which represents the formation of ester linkages between the two polymers (the citrate crosslinks). The SEM results were shown the homogeneous morphology of the composite. Around 50%-90% of heavy metals were removed from an aqueous media by chitosan/CMC bio-based composite. Furthermore, the results have shown that the adsorption process follows a pseudo-second order rate model generally while the Langmuir-Freundlich adsorption isotherm provides the best fit with a maximum adsorption capacity from 33.77 to 82.24 mg/g at 25 oC.


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How to Cite

Sharif, R., Prof. Azhari Hamid Nour, & Dr. Issa Ismail Mohammed Ahmed. (2023). Capture and Removal of Heavy Metals from an Aqueous Media by Polymeric Adsorption. International Journal of Applied Sciences: Current and Future Research Trends, 17(1), 16–49. Retrieved from