| Autor: |
Birniwa, Abdullahi Haruna, Abubakar, Abdulsalam Salisu, Huq, A. K. Obidul, Mahmud, Habibun Nabi Muhammad Ekramul |
| Předmět: |
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| Zdroj: |
Journal of Macromolecular Science: Pure & Applied Chemistry; 2021, Vol. 58 Issue 3, p206-217, 12p |
| Abstrakt: |
In order to use nitrogen atoms in polymers as the active adsorption sites for heavy metal ions, an effort has been made to couple polyethyleneimine, a water soluble polymer with polypyrrole, a conjugated polymer for nickel ion adsorption from aqueous solution due to a large number of nitrogen atoms available in the prepared water insoluble polypyrrole-polyethyleneimine (PPy-PEI) polymer nanocomposite. The BET surface area and average particle size of the prepared PPy-PEI nanocomposites were found to be 17 m2/g and ∼ 18–34 nm, respectively. TGA and DSC were used to study the thermal behavior of the composites. The nickel ion adsorption efficiency shown by pristine polypyrrole was found to be 42%, while a much higher adsorption efficiency of 99.8% was observed using polypyrrole-polyethyleneimine (PPy-PEI) nanocomposite in a batch equilibrium system. The optimum adsorption dosage was found to be 0.08 g at a pH of 4.5 and a contact time of 60 mins at room temperature. The ATR-FTIR, XRD and EDX provide the evidence of nickel ion adsorption by PPy-PEI nanocomposites. The adsorption data was well-fitted to Freundlich isotherm model and followed the pseudo-first order kinetic model. The adsorbent can be reused with more than 82% at the 3rd cycle. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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