Synthesis and characterization of a series of cross-linked polyamines for removal of Erichrome Black T from aqueous solution
| Autor: | Shamsuddeen A. Haladu, Mukarram Zubair, Nuhu Dalhat Mu’azu, Mohammad Saood Manzar, Othman Charles S. Al Hamouz, Aleem Qureshi, Thomas F. Garrison, Nawaf I. Blaisi |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Condensation polymer Aqueous solution General Chemical Engineering Langmuir adsorption model Sorption 02 engineering and technology General Chemistry Polymer 021001 nanoscience & nanotechnology Biochemistry Endothermic process Piperazine chemistry.chemical_compound symbols.namesake Adsorption 020401 chemical engineering chemistry symbols 0204 chemical engineering 0210 nano-technology Nuclear chemistry |
| Zdroj: | Chinese Journal of Chemical Engineering. 32:341-352 |
| ISSN: | 1004-9541 |
| DOI: | 10.1016/j.cjche.2020.09.052 |
| Popis: | 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 ΔG and positive ΔH 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. |
| Databáze: | OpenAIRE |
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