Polyethylenimine-Modified Magnetic Chitosan for the Uptake of Arsenic from Water
The removal of heavy metals from water has become a global environmental problem. Various materials have been applied as adsorbent to remove metals from water. In this field, nanomaterials have been gaining increasing interest due to their exceptional properties. In this work, we discuss the synthes...
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MDPI AG
2021-06-01
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| author | Norah Salem Alsaiari Fatimah Mohammed Alzahrani Khadijah Mohammedsaleh Katubi Abdelfattah Amari Faouzi Ben Rebah Mohamed A. Tahoon |
| author_facet | Norah Salem Alsaiari Fatimah Mohammed Alzahrani Khadijah Mohammedsaleh Katubi Abdelfattah Amari Faouzi Ben Rebah Mohamed A. Tahoon |
| author_sort | Norah Salem Alsaiari |
| collection | DOAJ |
| description | The removal of heavy metals from water has become a global environmental problem. Various materials have been applied as adsorbent to remove metals from water. In this field, nanomaterials have been gaining increasing interest due to their exceptional properties. In this work, we discuss the synthesis of a core-shell structure nanocomposite by the modification of magnetic chitosan (CS) (Fe<sub>3</sub>O<sub>4</sub>/CS) with polyethylenimine (PEI) to produce Fe<sub>3</sub>O<sub>4</sub>/CS/PEI composite for the adsorption of arsenic ions (As(V) and As(III)) from aqueous solution. The synthesized materials were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), and vibrating sample magnetometer (VSM). The results indicated the successful combination of three components of the nanocomposite. The adsorption conditions were optimized by studying the effect of different parameters included pH, contact time, initial concentration, and adsorbent dosage. The optimum adsorption pH was found to be 6.7 while the optimum adsorbent dosage was found to be 2.0 and 1.5 g/L for As(III) and As(V), respectively. The removal efficiency for the uptake of As(III) and As(V) ions over Fe<sub>3</sub>O<sub>4</sub>/CS/PEI nanocomposite at optimum conditions was found to be 99.5 and 99.7%, respectively. The experimental results were fitted using Freundlich’s and Langmuir’s isotherms. The data were more fitted to Langmuir isotherm providing a suggestion of monolayer adsorption with maximum adsorption capacity equal to 77.61 and 86.50 mg/g for the removal of As(III) and As(V), respectively. Moreover, linear regression coefficient (R<sup>2</sup>) indicated that the adsorption of arsenic ions over the synthesized magnetic nanocomposite obeyed pseudo 2nd order suggesting the chemisorption process. The reusability of the nanosorbent for arsenic uptake using sodium hydroxide as eluent was also assessed up to five cycles. Interestingly, Fe<sub>3</sub>O<sub>4</sub>/CS/PEI nanocomposite can be considered as a promising adsorbent for As ions’ removal from water and should be tested for the removal of other pollutants. |
| first_indexed | 2024-03-10T10:19:02Z |
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| spelling | doaj.art-f210e839a1da4a45a48d9bf04272fe932023-11-22T00:39:13ZengMDPI AGApplied Sciences2076-34172021-06-011112563010.3390/app11125630Polyethylenimine-Modified Magnetic Chitosan for the Uptake of Arsenic from WaterNorah Salem Alsaiari0Fatimah Mohammed Alzahrani1Khadijah Mohammedsaleh Katubi2Abdelfattah Amari3Faouzi Ben Rebah4Mohamed A. Tahoon5Chemistry Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi ArabiaChemistry Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi ArabiaChemistry Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi ArabiaDepartment of Chemical Engineering, College of Engineering, King Khalid University, Abha 61411, Saudi ArabiaHigher Institute of Biotechnology of Sfax (ISBS), Sfax University, P.O. Box 263, Sfax 3000, TunisiaDepartment of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi ArabiaThe removal of heavy metals from water has become a global environmental problem. Various materials have been applied as adsorbent to remove metals from water. In this field, nanomaterials have been gaining increasing interest due to their exceptional properties. In this work, we discuss the synthesis of a core-shell structure nanocomposite by the modification of magnetic chitosan (CS) (Fe<sub>3</sub>O<sub>4</sub>/CS) with polyethylenimine (PEI) to produce Fe<sub>3</sub>O<sub>4</sub>/CS/PEI composite for the adsorption of arsenic ions (As(V) and As(III)) from aqueous solution. The synthesized materials were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), and vibrating sample magnetometer (VSM). The results indicated the successful combination of three components of the nanocomposite. The adsorption conditions were optimized by studying the effect of different parameters included pH, contact time, initial concentration, and adsorbent dosage. The optimum adsorption pH was found to be 6.7 while the optimum adsorbent dosage was found to be 2.0 and 1.5 g/L for As(III) and As(V), respectively. The removal efficiency for the uptake of As(III) and As(V) ions over Fe<sub>3</sub>O<sub>4</sub>/CS/PEI nanocomposite at optimum conditions was found to be 99.5 and 99.7%, respectively. The experimental results were fitted using Freundlich’s and Langmuir’s isotherms. The data were more fitted to Langmuir isotherm providing a suggestion of monolayer adsorption with maximum adsorption capacity equal to 77.61 and 86.50 mg/g for the removal of As(III) and As(V), respectively. Moreover, linear regression coefficient (R<sup>2</sup>) indicated that the adsorption of arsenic ions over the synthesized magnetic nanocomposite obeyed pseudo 2nd order suggesting the chemisorption process. The reusability of the nanosorbent for arsenic uptake using sodium hydroxide as eluent was also assessed up to five cycles. Interestingly, Fe<sub>3</sub>O<sub>4</sub>/CS/PEI nanocomposite can be considered as a promising adsorbent for As ions’ removal from water and should be tested for the removal of other pollutants.https://www.mdpi.com/2076-3417/11/12/5630magnetic nanomaterialsarsenic removaladsorptioncore-shell structures |
| spellingShingle | Norah Salem Alsaiari Fatimah Mohammed Alzahrani Khadijah Mohammedsaleh Katubi Abdelfattah Amari Faouzi Ben Rebah Mohamed A. Tahoon Polyethylenimine-Modified Magnetic Chitosan for the Uptake of Arsenic from Water Applied Sciences magnetic nanomaterials arsenic removal adsorption core-shell structures |
| title | Polyethylenimine-Modified Magnetic Chitosan for the Uptake of Arsenic from Water |
| title_full | Polyethylenimine-Modified Magnetic Chitosan for the Uptake of Arsenic from Water |
| title_fullStr | Polyethylenimine-Modified Magnetic Chitosan for the Uptake of Arsenic from Water |
| title_full_unstemmed | Polyethylenimine-Modified Magnetic Chitosan for the Uptake of Arsenic from Water |
| title_short | Polyethylenimine-Modified Magnetic Chitosan for the Uptake of Arsenic from Water |
| title_sort | polyethylenimine modified magnetic chitosan for the uptake of arsenic from water |
| topic | magnetic nanomaterials arsenic removal adsorption core-shell structures |
| url | https://www.mdpi.com/2076-3417/11/12/5630 |
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