Study on the SBA-15 Silica and ETS-10 Titanosilicate as Efficient Adsorbents for Cu(II) Removal from Aqueous Solution
The efficiency of Cu(II) removal from aqueous solution by two adsorbents, silica SBA-15 and titanosilicate ETS-10, was investigated. Effects of various experimental parameters such as: contact time, pH, initial copper concentration, adsorbent dosage, temperature were investigated in order to determi...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Online Access: | https://www.mdpi.com/2073-4441/14/6/857 |
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| author | Doina Humelnicu Inga Zinicovscaia Ionel Humelnicu Maria Ignat Nikita Yushin Dmitrii Grozdov |
| author_facet | Doina Humelnicu Inga Zinicovscaia Ionel Humelnicu Maria Ignat Nikita Yushin Dmitrii Grozdov |
| author_sort | Doina Humelnicu |
| collection | DOAJ |
| description | The efficiency of Cu(II) removal from aqueous solution by two adsorbents, silica SBA-15 and titanosilicate ETS-10, was investigated. Effects of various experimental parameters such as: contact time, pH, initial copper concentration, adsorbent dosage, temperature were investigated in order to determine the maximum adsorption capacity of the adsorbents. The maximum adsorption capacity of silica SBA-15 was achieved at pH 5.0, and of titanosilicate ETS-10 at pH 6.0. The Freundlich, Langmuir, and Temkin isotherm models were applied in order to describe the equilibrium adsorption of Cu(II) by the studied adsorbents. Equilibrium data fitted well to the Langmuir model with a higher adsorption capacity of ETS-10 (172.53 mg·g<sup>−1</sup>) towards Cu(II) than SBA-15 (52.71 mg·g<sup>−1</sup>). Pseudo-first- and pseudo-second-order, Elovich, and Weber–Morris intraparticle diffusion models were used for description of the experimental kinetic data. It was found that the pseudo-first-order and pseudo-second-order kinetic models were the best applicable models to describe the adsorption kinetic data. Thermodynamic parameters that characterize the process indicated that the adsorption of Cu(II) onto the two adsorbents is spontaneous and endothermic. |
| first_indexed | 2024-03-09T12:14:50Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T12:14:50Z |
| publishDate | 2022-03-01 |
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| record_format | Article |
| series | Water |
| spelling | doaj.art-6b7a5cf060f34728b94e7d60c35b03d02023-11-30T22:48:16ZengMDPI AGWater2073-44412022-03-0114685710.3390/w14060857Study on the SBA-15 Silica and ETS-10 Titanosilicate as Efficient Adsorbents for Cu(II) Removal from Aqueous SolutionDoina Humelnicu0Inga Zinicovscaia1Ionel Humelnicu2Maria Ignat3Nikita Yushin4Dmitrii Grozdov5Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Boulevard Carol I, 11, 700506 Iasi, RomaniaJoint Institute for Nuclear Research, Joliot-Curie Street, 6, 1419890 Dubna, RussiaFaculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Boulevard Carol I, 11, 700506 Iasi, RomaniaFaculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Boulevard Carol I, 11, 700506 Iasi, RomaniaJoint Institute for Nuclear Research, Joliot-Curie Street, 6, 1419890 Dubna, RussiaJoint Institute for Nuclear Research, Joliot-Curie Street, 6, 1419890 Dubna, RussiaThe efficiency of Cu(II) removal from aqueous solution by two adsorbents, silica SBA-15 and titanosilicate ETS-10, was investigated. Effects of various experimental parameters such as: contact time, pH, initial copper concentration, adsorbent dosage, temperature were investigated in order to determine the maximum adsorption capacity of the adsorbents. The maximum adsorption capacity of silica SBA-15 was achieved at pH 5.0, and of titanosilicate ETS-10 at pH 6.0. The Freundlich, Langmuir, and Temkin isotherm models were applied in order to describe the equilibrium adsorption of Cu(II) by the studied adsorbents. Equilibrium data fitted well to the Langmuir model with a higher adsorption capacity of ETS-10 (172.53 mg·g<sup>−1</sup>) towards Cu(II) than SBA-15 (52.71 mg·g<sup>−1</sup>). Pseudo-first- and pseudo-second-order, Elovich, and Weber–Morris intraparticle diffusion models were used for description of the experimental kinetic data. It was found that the pseudo-first-order and pseudo-second-order kinetic models were the best applicable models to describe the adsorption kinetic data. Thermodynamic parameters that characterize the process indicated that the adsorption of Cu(II) onto the two adsorbents is spontaneous and endothermic.https://www.mdpi.com/2073-4441/14/6/857mesoporous silica SBA-15titanosilicate ETS-10adsorptioncopper |
| spellingShingle | Doina Humelnicu Inga Zinicovscaia Ionel Humelnicu Maria Ignat Nikita Yushin Dmitrii Grozdov Study on the SBA-15 Silica and ETS-10 Titanosilicate as Efficient Adsorbents for Cu(II) Removal from Aqueous Solution Water mesoporous silica SBA-15 titanosilicate ETS-10 adsorption copper |
| title | Study on the SBA-15 Silica and ETS-10 Titanosilicate as Efficient Adsorbents for Cu(II) Removal from Aqueous Solution |
| title_full | Study on the SBA-15 Silica and ETS-10 Titanosilicate as Efficient Adsorbents for Cu(II) Removal from Aqueous Solution |
| title_fullStr | Study on the SBA-15 Silica and ETS-10 Titanosilicate as Efficient Adsorbents for Cu(II) Removal from Aqueous Solution |
| title_full_unstemmed | Study on the SBA-15 Silica and ETS-10 Titanosilicate as Efficient Adsorbents for Cu(II) Removal from Aqueous Solution |
| title_short | Study on the SBA-15 Silica and ETS-10 Titanosilicate as Efficient Adsorbents for Cu(II) Removal from Aqueous Solution |
| title_sort | study on the sba 15 silica and ets 10 titanosilicate as efficient adsorbents for cu ii removal from aqueous solution |
| topic | mesoporous silica SBA-15 titanosilicate ETS-10 adsorption copper |
| url | https://www.mdpi.com/2073-4441/14/6/857 |
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