Melamine‐based microporous polymer for highly efficient removal of copper(II) from aqueous solution |
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| Authors: | Omer Suat Taskin Nagihan Ersoy Abdullah Aksu Baris Kiskan Nuray Balkis Yusuf Yagci |
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| Affiliation: | 1. Istanbul Technical University, Faculty of Science and Letters, Department of Chemistry, Maslak, Istanbul, Turkey;2. Kirklareli University, Department of Chemistry, Merkez, Kirklareli, Turkey;3. Istanbul University, Institute of Marine Science and Management, Department of Chemical Oceanography, Vefa 34134, Istanbul, Turkey;4. King Abdulaziz University, Center of Excellence for Advanced Materials Research (CEAMR) and Chemistry Department, Jeddah 21589, Saudi Arabia |
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| Abstract: | In this study, we investigated the ability of a melamine‐based microporous polymer network as an adsorbent for removal of copper(II) species from aqueous solutions. A designed Schiff based network (SNW) with high specific surface area was synthesized using melamine and terephthalaldehyde monomers at 180 °C for 3 days followed by a freeze‐drying process. The porous structure of the material was confirmed by SEM analysis and CO2 adsorption/desorption studies at 77.3 K. The adsorption character of the SNW polymer for various metal salts, namely Pb(II), Fe(II), Hg(II), Zn(II), Ni(II) and Cd(II), was investigated and a specific sorption behaviour against Cu(II) salts was observed. The role of pH and contact time was examined and the highest adsorption capacity for Cu(II) was found as 92% with pH 3.5 at the end of 300 min. As evidenced by XRD and Fourier transform infrared spectral analysis, the sorption mechanism is attributed to the coordination system formed between amino groups in the porous structure and Cu(II) ions. Reusability of the system was also demonstrated by applying four cycles without any significant loss of activity. © 2016 Society of Chemical Industry |
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| Keywords: | melamine microporous adsorbent polymer adsorption copper removal |
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