Facile synthesis of hetaryl-modified MCM-41 and targeted removal of Pb(II) ions for water purification
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Facile synthesis of hetaryl‑modified MCM‑41 and targeted removal of Pb(II) ions for water purification Farah Suhail1 · Madeeha Batool1 · Muhammad Imran Din1 · Misbahul Ain Khan1,2 · Ghayoor Abbas Chotana3 · Iqra Zubair4 · Asma Tufail Shah5
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract A novel pyrazole grafted MCM-41 hybrid has been synthesized by post-grafting method for targeted water purification. MCM-41 was first functionalized with 3-aminopropyltriethoxysilane (APTES) followed by immobilization of acyl functionalized pyrazole derivative through Schiff’s base formation. Fourier transform infrared (FTIR) spectroscopy, solid state 13 C nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA) and elemental analysis confirmed the covalent attachment of organic moiety to the silica surface, whilst scanning electron microscope (SEM) and N 2 adsorption–desorption analysis confirmed the structural integrity and the preservation of mesoporous structure of MCM-41 during surface modification. The novel material showed excellent results for the removal of Pb(II) metal ions with highest adsorption capacity (qe) of 2416 mg g−1. With this adsorption capacity, the prepared hybrid efficiently removed 96.6% of Pb(II) metal ions from aqueous solution using minimum adsorbent concentration (1 mg) ever reported. The adsorbent was reused for five cycles with minimum 94.85% removal efficiency after simple treatment with 6 N HCl. This reusable adsorbent may further be applied for heavy metal removal from industrial effluent. Keywords Mesoporous silica · Pyrazole · Functionalized MCM-41 · Adsorption capacity · Pb(II)
1 Introduction
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10934-020-00919-8) contains supplementary material, which is available to authorized users.
Heavy metal pollution has turned out to be a major threat to environment as well as public health. Heavy metal poisoning is created when they enter into ecosystem and food chain. Being non-biodegradable, they gradually accumulate in the living bodies to produce chronic toxic effects.
* Madeeha Batool [email protected]; [email protected]
1
Institute of Chemistry, University of the Punjab, Lahore 54590, Pakistan
* Asma Tufail Shah [email protected]
2
Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
Farah Suhail [email protected]
3
Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences, Lahore 54792, Pakistan
4
Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
5
Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan
Muhammad Imran Din [email protected] Misbahul Ain Khan [email protected] Ghayoor Abbas Chotana [email protected]
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