Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater
This study presents the feasibility of using various functionalized substrates, Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) and Al<sub>2</sub>O<sub>3</sub> spheres, for the removal of Cd from aqueous solution. To improve the materials’ affinity to...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-07-01
|
| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/26/14/4150 |
| _version_ | 1797526557222240256 |
|---|---|
| author | Ana Lucía Campaña Amaimen Guillén Ricardo Rivas Veronica Akle Juan C. Cruz Johann F. Osma |
| author_facet | Ana Lucía Campaña Amaimen Guillén Ricardo Rivas Veronica Akle Juan C. Cruz Johann F. Osma |
| author_sort | Ana Lucía Campaña |
| collection | DOAJ |
| description | This study presents the feasibility of using various functionalized substrates, Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) and Al<sub>2</sub>O<sub>3</sub> spheres, for the removal of Cd from aqueous solution. To improve the materials’ affinity to Cd, we explored four different surface modifications, namely (3-Aminopropyl) triethoxysilane (APTES), L-Cysteine (Cys) and 3-(triethoxysilyl) propylsuccinic anhydride (CAS). Particles were characterized by FTIR, FIB-SEM and DLS and studied for their ability to remove metal ions. Modified NPs with APTES proved to be effective for Cd removal with efficiencies of up to 94%, and retention ratios up to 0.49 mg of Cd per g of NPs. Batch adsorption experiments investigated the influence of pH, contact time, and adsorbent dose on Cd adsorption. Additionally, the recyclability of the adsorbent and its potential phytotoxicity and animal toxicity effects were explored. The Langmuir, Freundlich, pseudo-first-order and pseudo-second-order models were applied to describe the behavior of the Cd adsorption processes. The adsorption and desorption results showed that Fe<sub>3</sub>O<sub>4</sub> NPs modified with APTES are promising low-cost platforms with low phytotoxicity for highly efficient heavy metal removal in wastewater. |
| first_indexed | 2024-03-10T09:30:58Z |
| format | Article |
| id | doaj.art-e596aa6f28714523bef2108b7fbd7caa |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T09:30:58Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-e596aa6f28714523bef2108b7fbd7caa2023-11-22T04:29:20ZengMDPI AGMolecules1420-30492021-07-012614415010.3390/molecules26144150Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in WastewaterAna Lucía Campaña0Amaimen Guillén1Ricardo Rivas2Veronica Akle3Juan C. Cruz4Johann F. Osma5Department of Electrical and Electronic Engineering, Universidad de Los Andes, Bogotá 111711, ColombiaDepartment of Electrical and Electronic Engineering, Universidad de Los Andes, Bogotá 111711, ColombiaDepartment of Chemistry, Science Faculty, Universidad de Los Andes, Bogotá 111711, ColombiaLaboratory of Neuroscience and Circadian Rhythms, School of Medicine, Universidad de Los Andes, Bogotá 111711, ColombiaDepartment of Biomedical Engineering, Universidad de Los Andes, Bogotá 111711, ColombiaDepartment of Electrical and Electronic Engineering, Universidad de Los Andes, Bogotá 111711, ColombiaThis study presents the feasibility of using various functionalized substrates, Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) and Al<sub>2</sub>O<sub>3</sub> spheres, for the removal of Cd from aqueous solution. To improve the materials’ affinity to Cd, we explored four different surface modifications, namely (3-Aminopropyl) triethoxysilane (APTES), L-Cysteine (Cys) and 3-(triethoxysilyl) propylsuccinic anhydride (CAS). Particles were characterized by FTIR, FIB-SEM and DLS and studied for their ability to remove metal ions. Modified NPs with APTES proved to be effective for Cd removal with efficiencies of up to 94%, and retention ratios up to 0.49 mg of Cd per g of NPs. Batch adsorption experiments investigated the influence of pH, contact time, and adsorbent dose on Cd adsorption. Additionally, the recyclability of the adsorbent and its potential phytotoxicity and animal toxicity effects were explored. The Langmuir, Freundlich, pseudo-first-order and pseudo-second-order models were applied to describe the behavior of the Cd adsorption processes. The adsorption and desorption results showed that Fe<sub>3</sub>O<sub>4</sub> NPs modified with APTES are promising low-cost platforms with low phytotoxicity for highly efficient heavy metal removal in wastewater.https://www.mdpi.com/1420-3049/26/14/4150wastewatercadmiummagnetite nanoparticlesaluminafunctionalization |
| spellingShingle | Ana Lucía Campaña Amaimen Guillén Ricardo Rivas Veronica Akle Juan C. Cruz Johann F. Osma Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater Molecules wastewater cadmium magnetite nanoparticles alumina functionalization |
| title | Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater |
| title_full | Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater |
| title_fullStr | Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater |
| title_full_unstemmed | Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater |
| title_short | Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater |
| title_sort | functionalization and evaluation of inorganic adsorbents for the removal of cadmium in wastewater |
| topic | wastewater cadmium magnetite nanoparticles alumina functionalization |
| url | https://www.mdpi.com/1420-3049/26/14/4150 |
| work_keys_str_mv | AT analuciacampana functionalizationandevaluationofinorganicadsorbentsfortheremovalofcadmiuminwastewater AT amaimenguillen functionalizationandevaluationofinorganicadsorbentsfortheremovalofcadmiuminwastewater AT ricardorivas functionalizationandevaluationofinorganicadsorbentsfortheremovalofcadmiuminwastewater AT veronicaakle functionalizationandevaluationofinorganicadsorbentsfortheremovalofcadmiuminwastewater AT juanccruz functionalizationandevaluationofinorganicadsorbentsfortheremovalofcadmiuminwastewater AT johannfosma functionalizationandevaluationofinorganicadsorbentsfortheremovalofcadmiuminwastewater |