Adsorption of phosphate on iron oxide doped halloysite nanotubes
<p dir="ltr">Excess phosphate in water is known to cause eutrophication, and its removal is imperative. Nanoclay minerals are widely used in environmental remediation due to their low-cost, adequate availability, environmental compatibility, and adsorption efficiency. However, the re...
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| مؤلفون آخرون: | , , , |
| منشور في: |
2019
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| _version_ | 1864513554526240768 |
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| author | Dema A. Almasri (14152743) |
| author2 | Navid B. Saleh (1929187) Muataz A. Atieh (14152746) Gordon McKay (1755814) Said Ahzi (8968706) |
| author2_role | author author author author |
| author_facet | Dema A. Almasri (14152743) Navid B. Saleh (1929187) Muataz A. Atieh (14152746) Gordon McKay (1755814) Said Ahzi (8968706) |
| author_role | author |
| dc.creator.none.fl_str_mv | Dema A. Almasri (14152743) Navid B. Saleh (1929187) Muataz A. Atieh (14152746) Gordon McKay (1755814) Said Ahzi (8968706) |
| dc.date.none.fl_str_mv | 2019-03-01T03:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1038/s41598-019-39035-2 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Adsorption_of_phosphate_on_iron_oxide_doped_halloysite_nanotubes/21598110 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Biomedical and clinical sciences Oncology and carcinogenesis Pharmacology and pharmaceutical sciences Leukemia Leukemic Blast Cells (LBCs) Oncogenic Activity Molecular Expression Calcium Influx Pulmonary Dysfunction |
| dc.title.none.fl_str_mv | Adsorption of phosphate on iron oxide doped halloysite nanotubes |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">Excess phosphate in water is known to cause eutrophication, and its removal is imperative. Nanoclay minerals are widely used in environmental remediation due to their low-cost, adequate availability, environmental compatibility, and adsorption efficiency. However, the removal of anions with nanoclays is not very effective because of electrostatic repulsion from clay surfaces with a net negative charge. Among clay minerals, halloysite nanotubes (HNTs) possess a negatively charged exterior and a positively charged inner lumen. This provides an increased affinity for anion removal. In this study, HNTs are modified with nano-scale iron oxide (Fe<sub>2</sub>O<sub>3</sub>) to enhance the adsorption capacity of the nanosorbent. This modification allowed for effective distribution of these oxide surfaces, which are known to sorb phosphate via ligand exchange and by forming inner-sphere complexes. A detailed characterization of the raw and (Fe<sub>2</sub>O<sub>3</sub>) modified HNTs (Fe-HNT) is conducted. Influences ofFe<sub>2</sub>O<sub>3</sub> loading, adsorbent dosage, contact time, pH, initial phosphate concentration, and coexisting ions on the phosphate adsorption capacity are studied. Results demonstrate that adsorption on Fe-HNT is pH-dependent with fast initial adsorption kinetics. The underlying mechanism is identified as a combination of electrostatic attraction, ligand exchange, and Lewis acid-base interactions. The nanomaterial provides promising results for its application in water/wastewater treatment.</p><h2>Other Information</h2><p dir="ltr">Published in: Scientific Reports<br>License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="http://dx.doi.org/10.1038/s41598-019-39035-2" target="_blank">http://dx.doi.org/10.1038/s41598-019-39035-2</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_a8a6748820ed2d4cff2cf853d120cd20 |
| identifier_str_mv | 10.1038/s41598-019-39035-2 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/21598110 |
| publishDate | 2019 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Adsorption of phosphate on iron oxide doped halloysite nanotubesDema A. Almasri (14152743)Navid B. Saleh (1929187)Muataz A. Atieh (14152746)Gordon McKay (1755814)Said Ahzi (8968706)Biomedical and clinical sciencesOncology and carcinogenesisPharmacology and pharmaceutical sciencesLeukemiaLeukemic Blast Cells (LBCs)Oncogenic ActivityMolecular ExpressionCalcium InfluxPulmonary Dysfunction<p dir="ltr">Excess phosphate in water is known to cause eutrophication, and its removal is imperative. Nanoclay minerals are widely used in environmental remediation due to their low-cost, adequate availability, environmental compatibility, and adsorption efficiency. However, the removal of anions with nanoclays is not very effective because of electrostatic repulsion from clay surfaces with a net negative charge. Among clay minerals, halloysite nanotubes (HNTs) possess a negatively charged exterior and a positively charged inner lumen. This provides an increased affinity for anion removal. In this study, HNTs are modified with nano-scale iron oxide (Fe<sub>2</sub>O<sub>3</sub>) to enhance the adsorption capacity of the nanosorbent. This modification allowed for effective distribution of these oxide surfaces, which are known to sorb phosphate via ligand exchange and by forming inner-sphere complexes. A detailed characterization of the raw and (Fe<sub>2</sub>O<sub>3</sub>) modified HNTs (Fe-HNT) is conducted. Influences ofFe<sub>2</sub>O<sub>3</sub> loading, adsorbent dosage, contact time, pH, initial phosphate concentration, and coexisting ions on the phosphate adsorption capacity are studied. Results demonstrate that adsorption on Fe-HNT is pH-dependent with fast initial adsorption kinetics. The underlying mechanism is identified as a combination of electrostatic attraction, ligand exchange, and Lewis acid-base interactions. The nanomaterial provides promising results for its application in water/wastewater treatment.</p><h2>Other Information</h2><p dir="ltr">Published in: Scientific Reports<br>License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="http://dx.doi.org/10.1038/s41598-019-39035-2" target="_blank">http://dx.doi.org/10.1038/s41598-019-39035-2</a></p>2019-03-01T03:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1038/s41598-019-39035-2https://figshare.com/articles/journal_contribution/Adsorption_of_phosphate_on_iron_oxide_doped_halloysite_nanotubes/21598110CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/215981102019-03-01T03:00:00Z |
| spellingShingle | Adsorption of phosphate on iron oxide doped halloysite nanotubes Dema A. Almasri (14152743) Biomedical and clinical sciences Oncology and carcinogenesis Pharmacology and pharmaceutical sciences Leukemia Leukemic Blast Cells (LBCs) Oncogenic Activity Molecular Expression Calcium Influx Pulmonary Dysfunction |
| status_str | publishedVersion |
| title | Adsorption of phosphate on iron oxide doped halloysite nanotubes |
| title_full | Adsorption of phosphate on iron oxide doped halloysite nanotubes |
| title_fullStr | Adsorption of phosphate on iron oxide doped halloysite nanotubes |
| title_full_unstemmed | Adsorption of phosphate on iron oxide doped halloysite nanotubes |
| title_short | Adsorption of phosphate on iron oxide doped halloysite nanotubes |
| title_sort | Adsorption of phosphate on iron oxide doped halloysite nanotubes |
| topic | Biomedical and clinical sciences Oncology and carcinogenesis Pharmacology and pharmaceutical sciences Leukemia Leukemic Blast Cells (LBCs) Oncogenic Activity Molecular Expression Calcium Influx Pulmonary Dysfunction |