Chinese Journal of Chemical Engineering ›› 2021, Vol. 32 ›› Issue (4): 341-352.doi: 10.1016/j.cjche.2020.09.052

• Energy, Resources and Environmental Technology • Previous Articles     Next Articles

Synthesis and characterization of a series of cross-linked polyamines for removal of Erichrome Black T from aqueous solution

Mohammad Saood Manzar1, Shamsuddeen A. Haladu2, Mukarram Zubair1, Nuhu Dalhat Mu'azu1, Aleem Qureshi1, Nawaf I. Blaisi1, Thomas F. Garrison3, Othman Charles S. Al Hamouz3   

  1. 1 Department of Environmental Engineering, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia;
    2 Department of Basic Engineering Sciences, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia;
    3 Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
  • Received:2019-12-22 Revised:2020-09-12 Online:2021-04-28 Published:2021-06-19
  • Contact: Shamsuddeen A. Haladu, Othman Charles S. Al Hamouz;
  • Supported by:
    The authors thank Imam Abdulrahman Bin Faisal University (IAU), Dammam for providing research facilities.

Abstract: A new series of polymers comprising four terpolymers was synthesized via Mannich polycondensation of benzene-1,4-diamine, formaldehyde and piperazine by varying the benzene-1,4-diamine and piperazine ratio. The new polyamines (labeled Dipip) were characterized using 13C solid-state NMR, FT-IR, TGA, DSC, XRD, SEM and EDX. The adsorptive performances of the synthesized polymers for Erichrome Black T (EBT) uptake from aqueous solution were investigated under batch process. Equilibrium, kinetic, and thermodynamic studies were conducted to determine the influence of different operational parameters of the adsorption process. The two most promising polymers among the series show an excellent EBT removal efficiency of ~100% and ~95% with high adsorption capacities of 775 mg·g-1 and 917 mg·g-1, respectively at a meager dosage of 5 mg. The sorption of EBT on the polymers was well described by Redlich-Peterson & Langmuir model while the kinetic studies indicate that pseudo-second order model was followed. For the thermodynamic studies, the negative DG and positive DH values obtained suggest a spontaneity of the sorption process which was endothermic in nature. The results of reusability test of the resins were promising even at the fourth cycle, showcasing the potentials of the new polymers in dyes contaminated water treatment.

Key words: Erichrome Black T dye, Cross-linked polymer, Adsorption, Regeneration, Langmuir, Thermodynamics