Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe)
The present work introduces a new sorbent, so-called PANI/MIL100(Fe), for removing Pb (II) and Cr (VI) from wastewater. The successful preparation of PANI/MIL100(Fe) was verified via Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM),...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/3/299 |
| _version_ | 1797609995715477504 |
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| author | Asghar Azizi Mojtaba Forghani Leila Asadi Kafshgari Ahmad Hassanzadeh |
| author_facet | Asghar Azizi Mojtaba Forghani Leila Asadi Kafshgari Ahmad Hassanzadeh |
| author_sort | Asghar Azizi |
| collection | DOAJ |
| description | The present work introduces a new sorbent, so-called PANI/MIL100(Fe), for removing Pb (II) and Cr (VI) from wastewater. The successful preparation of PANI/MIL100(Fe) was verified via Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) characterizations. This adsorptive material showed a microporous structure with surface area magnitudes of up to 261.29 m<sup>2</sup>/g, a total pore volume of 0.2124 cm<sup>3</sup>/g, and a pore size distribution of around 1.2 nm. The maximum adsorption capacities of PANI/MIL100(Fe) for Cr (VI) (pH = 2) and Pb (II) (pH = 6) were obtained as 72.37 and 81.76 mg/g, respectively. The isotherm modeling assessments illustrated that the sorption of Pb (II) and Cr (VI) was consistent with the Sips model (R<sup>2</sup> > 0.99), while the adsorption kinetics were suited to a pseudo-second-order model (R<sup>2</sup> > 0.95). Thermodynamic studies of both metal ions demonstrated the spontaneous and endothermic nature of the process. The reusability of the PANI/MIL100(Fe) indicated promising adsorption properties for Pb (II) and Cr (VI) up to three cycles. Moreover, the XRD and FT-IR spectroscopy results after adsorption/desorption showed excellent stability of the adsorbent and physisorption mechanism, wherein electrons were exchanged between the PANI/MIL-100(Fe) and Pb (II) and Cr (VI). Finally, the findings suggested that PANI/MIL100(Fe) can be considered an efficient and environmentally friendly adsorbent to remove Pb (II) and Cr (VI) from wastewater. |
| first_indexed | 2024-03-11T06:09:15Z |
| format | Article |
| id | doaj.art-5ac78a0a71f54322ac02abfd1ab7440c |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-11T06:09:15Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-5ac78a0a71f54322ac02abfd1ab7440c2023-11-17T12:46:39ZengMDPI AGMinerals2075-163X2023-02-0113329910.3390/min13030299Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe)Asghar Azizi0Mojtaba Forghani1Leila Asadi Kafshgari2Ahmad Hassanzadeh3Faculty of Mining Engineering, Petroleum and Geophysics, Shahrood University of Technology, Shahrood 36199-95161, IranFaculty of Mining Engineering, Petroleum and Geophysics, Shahrood University of Technology, Shahrood 36199-95161, IranDepartment of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol 47148-73113, IranDepartment of Geoscience and Petroleum, Faculty of Engineering, Norwegian University of Science and Technology, 7491 Trondheim, NorwayThe present work introduces a new sorbent, so-called PANI/MIL100(Fe), for removing Pb (II) and Cr (VI) from wastewater. The successful preparation of PANI/MIL100(Fe) was verified via Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) characterizations. This adsorptive material showed a microporous structure with surface area magnitudes of up to 261.29 m<sup>2</sup>/g, a total pore volume of 0.2124 cm<sup>3</sup>/g, and a pore size distribution of around 1.2 nm. The maximum adsorption capacities of PANI/MIL100(Fe) for Cr (VI) (pH = 2) and Pb (II) (pH = 6) were obtained as 72.37 and 81.76 mg/g, respectively. The isotherm modeling assessments illustrated that the sorption of Pb (II) and Cr (VI) was consistent with the Sips model (R<sup>2</sup> > 0.99), while the adsorption kinetics were suited to a pseudo-second-order model (R<sup>2</sup> > 0.95). Thermodynamic studies of both metal ions demonstrated the spontaneous and endothermic nature of the process. The reusability of the PANI/MIL100(Fe) indicated promising adsorption properties for Pb (II) and Cr (VI) up to three cycles. Moreover, the XRD and FT-IR spectroscopy results after adsorption/desorption showed excellent stability of the adsorbent and physisorption mechanism, wherein electrons were exchanged between the PANI/MIL-100(Fe) and Pb (II) and Cr (VI). Finally, the findings suggested that PANI/MIL100(Fe) can be considered an efficient and environmentally friendly adsorbent to remove Pb (II) and Cr (VI) from wastewater.https://www.mdpi.com/2075-163X/13/3/299PANI/MIL100(Fe)hydrothermal processadsorption characteristicsPb (II)Cr (VI) |
| spellingShingle | Asghar Azizi Mojtaba Forghani Leila Asadi Kafshgari Ahmad Hassanzadeh Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe) Minerals PANI/MIL100(Fe) hydrothermal process adsorption characteristics Pb (II) Cr (VI) |
| title | Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe) |
| title_full | Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe) |
| title_fullStr | Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe) |
| title_full_unstemmed | Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe) |
| title_short | Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe) |
| title_sort | adsorptive removal behavior of pb ii and cr vi pollutants from an aqueous environment onto polyaniline modified mil100 fe |
| topic | PANI/MIL100(Fe) hydrothermal process adsorption characteristics Pb (II) Cr (VI) |
| url | https://www.mdpi.com/2075-163X/13/3/299 |
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