Efficient Removal of Mercury from Wastewater Solutions by a Nitrogen-Doped Hyper-Crosslinked Polyamine
Mercury, a highly toxic metal and pollutant, poses a significant risk to human health and the environment. This study describes the synthesis of a new nitrogen-doped heteroaromatic hyper-crosslinked polyamine ( ) via the polycondensation of 2,6-diaminopyrazine and tris(4-formylphenyl)amine for the e...
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| Veröffentlicht in: | Polymers 2024-08, Vol.16 (17), p.2495 |
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| creator | Al Ghamdi, Khalid Ahmad, Aqeel Falca, Gheorghe Alrefaeia, Meshal Nawaf Al-Hamouz, Othman Charles S |
| description | Mercury, a highly toxic metal and pollutant, poses a significant risk to human health and the environment. This study describes the synthesis of a new nitrogen-doped heteroaromatic hyper-crosslinked polyamine (
) via the polycondensation of 2,6-diaminopyrazine and tris(4-formylphenyl)amine for the efficient removal of mercury ions from aqueous solutions. The
polymer was characterized by solid-state
C-NMR and FT-IR spectroscopy. A powder X-ray diffraction and thermogravimetric analysis showed that the polymer was semicrystalline in nature and stable up to 500 °C. Adsorption isotherms indicated that mercury adsorption occurred via mono- and multilayer adsorption by
, as depicted by the Langmuir, Freundlich, and Redlich-Peterson isotherm models, with a maximum adsorption capacity of
= 333.3 mg/g. Adsorption kinetic models suggested that the adsorption process was fast and effective, reaching equilibrium within 20 min. Thermodynamics of the adsorption process revealed that it was endothermic and spontaneous in nature due to the positive Δ
of 48 kJ/mol and negative Δ
values of -4.5 kJ/mol at 293 K. Wastewater treatment revealed 98% removal of mercury indicating the selective nature of
. Finally,
exhibited excellent performance and regeneration up to three cycles, demonstrating its great potential as an adsorbent for environmental remediation applications. |
| doi_str_mv | 10.3390/polym16172495 |
| format | Article |
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) via the polycondensation of 2,6-diaminopyrazine and tris(4-formylphenyl)amine for the efficient removal of mercury ions from aqueous solutions. The
polymer was characterized by solid-state
C-NMR and FT-IR spectroscopy. A powder X-ray diffraction and thermogravimetric analysis showed that the polymer was semicrystalline in nature and stable up to 500 °C. Adsorption isotherms indicated that mercury adsorption occurred via mono- and multilayer adsorption by
, as depicted by the Langmuir, Freundlich, and Redlich-Peterson isotherm models, with a maximum adsorption capacity of
= 333.3 mg/g. Adsorption kinetic models suggested that the adsorption process was fast and effective, reaching equilibrium within 20 min. Thermodynamics of the adsorption process revealed that it was endothermic and spontaneous in nature due to the positive Δ
of 48 kJ/mol and negative Δ
values of -4.5 kJ/mol at 293 K. Wastewater treatment revealed 98% removal of mercury indicating the selective nature of
. Finally,
exhibited excellent performance and regeneration up to three cycles, demonstrating its great potential as an adsorbent for environmental remediation applications.</description><identifier>ISSN: 2073-4360</identifier><identifier>EISSN: 2073-4360</identifier><identifier>DOI: 10.3390/polym16172495</identifier><identifier>PMID: 39274128</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Adsorbents ; Adsorption ; Aqueous solutions ; Crosslinking ; Efficiency ; Endothermic reactions ; Equilibrium ; Infrared spectroscopy ; Isotherms ; Mercury (metal) ; Multilayers ; Nitrogen ; NMR ; Nuclear magnetic resonance ; Polyamines ; Polymers ; Thermogravimetric analysis ; Wastewater treatment ; X ray powder diffraction</subject><ispartof>Polymers, 2024-08, Vol.16 (17), p.2495</ispartof><rights>2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c246t-5ccc10bc705d9872f1eca25ce1dd67bcbf9e00604f1dde7308a2393a2dd62af83</cites><orcidid>0009-0002-9237-8176 ; 0000-0003-1885-6934</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/39274128$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Al Ghamdi, Khalid</creatorcontrib><creatorcontrib>Ahmad, Aqeel</creatorcontrib><creatorcontrib>Falca, Gheorghe</creatorcontrib><creatorcontrib>Alrefaeia, Meshal Nawaf</creatorcontrib><creatorcontrib>Al-Hamouz, Othman Charles S</creatorcontrib><title>Efficient Removal of Mercury from Wastewater Solutions by a Nitrogen-Doped Hyper-Crosslinked Polyamine</title><title>Polymers</title><addtitle>Polymers (Basel)</addtitle><description>Mercury, a highly toxic metal and pollutant, poses a significant risk to human health and the environment. This study describes the synthesis of a new nitrogen-doped heteroaromatic hyper-crosslinked polyamine (
) via the polycondensation of 2,6-diaminopyrazine and tris(4-formylphenyl)amine for the efficient removal of mercury ions from aqueous solutions. The
polymer was characterized by solid-state
C-NMR and FT-IR spectroscopy. A powder X-ray diffraction and thermogravimetric analysis showed that the polymer was semicrystalline in nature and stable up to 500 °C. Adsorption isotherms indicated that mercury adsorption occurred via mono- and multilayer adsorption by
, as depicted by the Langmuir, Freundlich, and Redlich-Peterson isotherm models, with a maximum adsorption capacity of
= 333.3 mg/g. Adsorption kinetic models suggested that the adsorption process was fast and effective, reaching equilibrium within 20 min. Thermodynamics of the adsorption process revealed that it was endothermic and spontaneous in nature due to the positive Δ
of 48 kJ/mol and negative Δ
values of -4.5 kJ/mol at 293 K. Wastewater treatment revealed 98% removal of mercury indicating the selective nature of
. Finally,
exhibited excellent performance and regeneration up to three cycles, demonstrating its great potential as an adsorbent for environmental remediation applications.</description><subject>Adsorbents</subject><subject>Adsorption</subject><subject>Aqueous solutions</subject><subject>Crosslinking</subject><subject>Efficiency</subject><subject>Endothermic reactions</subject><subject>Equilibrium</subject><subject>Infrared spectroscopy</subject><subject>Isotherms</subject><subject>Mercury (metal)</subject><subject>Multilayers</subject><subject>Nitrogen</subject><subject>NMR</subject><subject>Nuclear magnetic resonance</subject><subject>Polyamines</subject><subject>Polymers</subject><subject>Thermogravimetric analysis</subject><subject>Wastewater treatment</subject><subject>X ray powder diffraction</subject><issn>2073-4360</issn><issn>2073-4360</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkctPwzAMxiMEYmjsyBVF4sKlkFdfRzQGQxoP8RDHKk0d1NE2JWlB_e_J2ECAL7bsnz59thE6oOSE85SctqYaahrRmIk03EJ7jMQ8EDwi27_qEZo4tyQ-RBh5dheNeMpiQVmyh_RM61KV0HT4HmrzLitsNL4Gq3o7YG1NjZ-l6-BDdmDxg6n6rjSNw_mAJb4pO2teoAnOTQsFng8t2GBqjXNV2bz6zp33J-uygX20o2XlYLLJY_R0MXuczoPF7eXV9GwRKCaiLgiVUpTkKiZhkSYx0xSUZKECWhRRnKtcp0BIRIT2DYg5SSTjKZfMj5nUCR-j47Vua81bD67L6tIpqCrZgOldxqk_giAiiTx69A9dmt423t0XRXlIYuKpYE2p1VoWdNbaspZ2yCjJVj_I_vzA84cb1T6vofihvy_OPwGSoYNs</recordid><startdate>20240831</startdate><enddate>20240831</enddate><creator>Al Ghamdi, Khalid</creator><creator>Ahmad, Aqeel</creator><creator>Falca, Gheorghe</creator><creator>Alrefaeia, Meshal Nawaf</creator><creator>Al-Hamouz, Othman Charles S</creator><general>MDPI AG</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>7X8</scope><orcidid>https://orcid.org/0009-0002-9237-8176</orcidid><orcidid>https://orcid.org/0000-0003-1885-6934</orcidid></search><sort><creationdate>20240831</creationdate><title>Efficient Removal of Mercury from Wastewater Solutions by a Nitrogen-Doped Hyper-Crosslinked Polyamine</title><author>Al Ghamdi, Khalid ; 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This study describes the synthesis of a new nitrogen-doped heteroaromatic hyper-crosslinked polyamine (
) via the polycondensation of 2,6-diaminopyrazine and tris(4-formylphenyl)amine for the efficient removal of mercury ions from aqueous solutions. The
polymer was characterized by solid-state
C-NMR and FT-IR spectroscopy. A powder X-ray diffraction and thermogravimetric analysis showed that the polymer was semicrystalline in nature and stable up to 500 °C. Adsorption isotherms indicated that mercury adsorption occurred via mono- and multilayer adsorption by
, as depicted by the Langmuir, Freundlich, and Redlich-Peterson isotherm models, with a maximum adsorption capacity of
= 333.3 mg/g. Adsorption kinetic models suggested that the adsorption process was fast and effective, reaching equilibrium within 20 min. Thermodynamics of the adsorption process revealed that it was endothermic and spontaneous in nature due to the positive Δ
of 48 kJ/mol and negative Δ
values of -4.5 kJ/mol at 293 K. Wastewater treatment revealed 98% removal of mercury indicating the selective nature of
. Finally,
exhibited excellent performance and regeneration up to three cycles, demonstrating its great potential as an adsorbent for environmental remediation applications.</abstract><cop>Switzerland</cop><pub>MDPI AG</pub><pmid>39274128</pmid><doi>10.3390/polym16172495</doi><orcidid>https://orcid.org/0009-0002-9237-8176</orcidid><orcidid>https://orcid.org/0000-0003-1885-6934</orcidid><oa>free_for_read</oa></addata></record> |
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| source | PubMed Central Open Access; MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals; PubMed Central |
| subjects | Adsorbents Adsorption Aqueous solutions Crosslinking Efficiency Endothermic reactions Equilibrium Infrared spectroscopy Isotherms Mercury (metal) Multilayers Nitrogen NMR Nuclear magnetic resonance Polyamines Polymers Thermogravimetric analysis Wastewater treatment X ray powder diffraction |
| title | Efficient Removal of Mercury from Wastewater Solutions by a Nitrogen-Doped Hyper-Crosslinked Polyamine |
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