A Comparative Study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels
Materials coming from renewable resources have drawn recently an increased attention in various applications as an eco-friendly alternative in the synthesis of novel functional materials. Polysaccharides, with their prominent representative – chitosan (CS), are well-known for their sorption properti...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/25/11/2664 |
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| author | Doina Humelnicu Ecaterina Stela Dragan Maria Ignat Maria Valentina Dinu |
| author_facet | Doina Humelnicu Ecaterina Stela Dragan Maria Ignat Maria Valentina Dinu |
| author_sort | Doina Humelnicu |
| collection | DOAJ |
| description | Materials coming from renewable resources have drawn recently an increased attention in various applications as an eco-friendly alternative in the synthesis of novel functional materials. Polysaccharides, with their prominent representative – chitosan (CS), are well-known for their sorption properties, being able to remove metal ions from dilute solutions either by electrostatic interactions or chelation. In this context, we proposed here a comparative study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> metal ions removal from industrial wastewaters by CS-based composite cryogels using batch technique. The composite cryogels consisting of CS embedding a natural zeolite, namely clinoptilolite, were synthesized by cryogelation, and their sorption performance were compared to those of CS cryogels and of acid-activated zeolite. A deeper analysis of thermodynamics and kinetics sorption data was performed to get insights into the sorption mechanism of all metal ions onto sorbents. Based on the optimized sorption conditions, the removal of the above-mentioned ions from aqueous solutions by the composite sorbent using dynamic technique was also evaluated. |
| first_indexed | 2024-03-10T19:17:40Z |
| format | Article |
| id | doaj.art-24e95ff6ee6748c4978efd13312e37dc |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T19:17:40Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-24e95ff6ee6748c4978efd13312e37dc2023-11-20T03:11:16ZengMDPI AGMolecules1420-30492020-06-012511266410.3390/molecules25112664A Comparative Study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite CryogelsDoina Humelnicu0Ecaterina Stela Dragan1Maria Ignat2Maria Valentina Dinu3Faculty of Chemistry, “Alexandru Ioan Cuza” University of Iasi, 700506 Iasi, RomaniaDepartment of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, RomaniaFaculty of Chemistry, “Alexandru Ioan Cuza” University of Iasi, 700506 Iasi, RomaniaDepartment of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, RomaniaMaterials coming from renewable resources have drawn recently an increased attention in various applications as an eco-friendly alternative in the synthesis of novel functional materials. Polysaccharides, with their prominent representative – chitosan (CS), are well-known for their sorption properties, being able to remove metal ions from dilute solutions either by electrostatic interactions or chelation. In this context, we proposed here a comparative study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> metal ions removal from industrial wastewaters by CS-based composite cryogels using batch technique. The composite cryogels consisting of CS embedding a natural zeolite, namely clinoptilolite, were synthesized by cryogelation, and their sorption performance were compared to those of CS cryogels and of acid-activated zeolite. A deeper analysis of thermodynamics and kinetics sorption data was performed to get insights into the sorption mechanism of all metal ions onto sorbents. Based on the optimized sorption conditions, the removal of the above-mentioned ions from aqueous solutions by the composite sorbent using dynamic technique was also evaluated.https://www.mdpi.com/1420-3049/25/11/2664chitosanzeolitecryogel sorbentsdynamic studymetal ions removal |
| spellingShingle | Doina Humelnicu Ecaterina Stela Dragan Maria Ignat Maria Valentina Dinu A Comparative Study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels Molecules chitosan zeolite cryogel sorbents dynamic study metal ions removal |
| title | A Comparative Study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels |
| title_full | A Comparative Study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels |
| title_fullStr | A Comparative Study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels |
| title_full_unstemmed | A Comparative Study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels |
| title_short | A Comparative Study on Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Fe<sup>3+</sup>, and Cr<sup>3+</sup> Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels |
| title_sort | comparative study on cu sup 2 sup zn sup 2 sup ni sup 2 sup fe sup 3 sup and cr sup 3 sup metal ions removal from industrial wastewaters by chitosan based composite cryogels |
| topic | chitosan zeolite cryogel sorbents dynamic study metal ions removal |
| url | https://www.mdpi.com/1420-3049/25/11/2664 |
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