Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous Solutions
The adsorption of Eu(III) on composites synthesised from graphene oxide (GO), maghemite (MGH), and chitosan (CS) has been studied using different approaches. The physicochemical and morphological characteristics of the composites GO-MGH, GO-CS, GO-MGH-CS I, II, and III were determined by XRD, Mössba...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/22/8035 |
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| author | Galina Lujanienė Raman Novikau Edith Flora Joel Karolina Karalevičiūtė Sergej Šemčuk Kęstutis Mažeika Martynas Talaikis Vidas Pakštas Saulius Tumėnas Jonas Mažeika Kęstutis Jokšas |
| author_facet | Galina Lujanienė Raman Novikau Edith Flora Joel Karolina Karalevičiūtė Sergej Šemčuk Kęstutis Mažeika Martynas Talaikis Vidas Pakštas Saulius Tumėnas Jonas Mažeika Kęstutis Jokšas |
| author_sort | Galina Lujanienė |
| collection | DOAJ |
| description | The adsorption of Eu(III) on composites synthesised from graphene oxide (GO), maghemite (MGH), and chitosan (CS) has been studied using different approaches. The physicochemical and morphological characteristics of the composites GO-MGH, GO-CS, GO-MGH-CS I, II, and III were determined by XRD, Mössbauer spectroscopy, FTIR, Raman spectroscopy, and TEM. According to the results of batch experiments, the maximum experimental adsorption capacity was 52, 54, 25, 103, and 102 mg/g for GO-MGH, GO-CS, GO-MGH-CS I, II, and III, respectively. The data obtained are in better agreement with the Langmuir, pseudo-second-order, and pseudo-first-order models only for GO-MGH. Thus, the adsorption of Eu(III) on the composites was a favourable, monolayer, and occurred at homogeneous sites. The nature of adsorption is chemical and, in the case of GO-MGH, physical. Tests of the composites in natural waters showed a high removal efficiency for Eu(III), Pu(IV), and Am(III), ranging from 74 to 100%. The ANFIS model has quite good predictive ability, as shown by the values for R<sup>2</sup>, MSE, SSE, and ARE. The GO-MGH-CS composites with the high adsorption capacity could be promising candidates for the removal of Eu(III) and the pre-concentration of Pu(IV) and Am(III) from natural waters. |
| first_indexed | 2024-03-09T18:07:21Z |
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| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T18:07:21Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-cbe8ceb59dba4a6ca95e60e826b1f6b52023-11-24T09:25:24ZengMDPI AGMolecules1420-30492022-11-012722803510.3390/molecules27228035Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous SolutionsGalina Lujanienė0Raman Novikau1Edith Flora Joel2Karolina Karalevičiūtė3Sergej Šemčuk4Kęstutis Mažeika5Martynas Talaikis6Vidas Pakštas7Saulius Tumėnas8Jonas Mažeika9Kęstutis Jokšas10SRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Center for Physical Sciences and Technology, Savanorių Str. 231, LT-02300 Vilnius, LithuaniaSRI Nature Research Centre, Akademijos Str. 2, LT-08412 Vilnius, LithuaniaSRI Nature Research Centre, Akademijos Str. 2, LT-08412 Vilnius, LithuaniaThe adsorption of Eu(III) on composites synthesised from graphene oxide (GO), maghemite (MGH), and chitosan (CS) has been studied using different approaches. The physicochemical and morphological characteristics of the composites GO-MGH, GO-CS, GO-MGH-CS I, II, and III were determined by XRD, Mössbauer spectroscopy, FTIR, Raman spectroscopy, and TEM. According to the results of batch experiments, the maximum experimental adsorption capacity was 52, 54, 25, 103, and 102 mg/g for GO-MGH, GO-CS, GO-MGH-CS I, II, and III, respectively. The data obtained are in better agreement with the Langmuir, pseudo-second-order, and pseudo-first-order models only for GO-MGH. Thus, the adsorption of Eu(III) on the composites was a favourable, monolayer, and occurred at homogeneous sites. The nature of adsorption is chemical and, in the case of GO-MGH, physical. Tests of the composites in natural waters showed a high removal efficiency for Eu(III), Pu(IV), and Am(III), ranging from 74 to 100%. The ANFIS model has quite good predictive ability, as shown by the values for R<sup>2</sup>, MSE, SSE, and ARE. The GO-MGH-CS composites with the high adsorption capacity could be promising candidates for the removal of Eu(III) and the pre-concentration of Pu(IV) and Am(III) from natural waters.https://www.mdpi.com/1420-3049/27/22/8035Eu(III)adsorptioncompositegraphene oxidemaghemitechitosan |
| spellingShingle | Galina Lujanienė Raman Novikau Edith Flora Joel Karolina Karalevičiūtė Sergej Šemčuk Kęstutis Mažeika Martynas Talaikis Vidas Pakštas Saulius Tumėnas Jonas Mažeika Kęstutis Jokšas Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous Solutions Molecules Eu(III) adsorption composite graphene oxide maghemite chitosan |
| title | Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous Solutions |
| title_full | Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous Solutions |
| title_fullStr | Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous Solutions |
| title_full_unstemmed | Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous Solutions |
| title_short | Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous Solutions |
| title_sort | preparation of graphene oxide maghemite chitosan composites for the adsorption of europium ions from aqueous solutions |
| topic | Eu(III) adsorption composite graphene oxide maghemite chitosan |
| url | https://www.mdpi.com/1420-3049/27/22/8035 |
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