Reduction and amalgamation of mercury in silver nanoparticle suspensions under dark conditions
Mercury (Hg) is a global pollutant of concern, and its transport and transformation are controlled by various environmental factors, with aquatic particles being an important driver. Understanding the interactions between silver nanoparticles (AgNPs) and Hg under dark condition is a prerequisite for...
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| Veröffentlicht in: | Chemosphere (Oxford) 2025-02, Vol.371, p.144035, Article 144035 |
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| creator | Oladoye, Peter Olusakin Liu, Guangliang Zhang, Qingzhe Cai, Yong |
| description | Mercury (Hg) is a global pollutant of concern, and its transport and transformation are controlled by various environmental factors, with aquatic particles being an important driver. Understanding the interactions between silver nanoparticles (AgNPs) and Hg under dark condition is a prerequisite for studying the extent of AgNPs interaction with light and its participation in Hg biogeochemical cycling. Herein, under laboratory experimental setting, it was found that the reduction of divalent Hg (Hg(II)) to gaseous elemental Hg (Hg0) by AgNPs readily occurred. Within 30 min, less than 20% of Hg(II) were reduced to Hg0, with more than 80% remaining in solution. The Hg0 generated distributed between AgNPs and aqueous phase with very small amount ( |
| doi_str_mv | 10.1016/j.chemosphere.2024.144035 |
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[Display omitted]
•Interaction of Hg(II) with silver nanoparticles (AgNPs) reduces Hg(II) to Hg(0).•Distribution between AgNPs and solution makes purgeable Hg(0) a minor fraction.•Produced Hg(0) is mainly present in the form of amalgamation with AgNPs.•Exposure of AgNPs to Hg(II) results in blueshift in surface plasmon resonance.</description><identifier>ISSN: 0045-6535</identifier><identifier>ISSN: 1879-1298</identifier><identifier>EISSN: 1879-1298</identifier><identifier>DOI: 10.1016/j.chemosphere.2024.144035</identifier><identifier>PMID: 39736363</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Biogeochemical cycling ; Characterization ; Mercury ; Mercury - chemistry ; Mercury-silver interaction ; Metal Nanoparticles - chemistry ; Oxidation-Reduction ; Silver - chemistry ; Silver nanoparticles ; Suspensions ; Water Pollutants, Chemical - chemistry</subject><ispartof>Chemosphere (Oxford), 2025-02, Vol.371, p.144035, Article 144035</ispartof><rights>2024 Elsevier Ltd</rights><rights>Copyright © 2024 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c1663-19900935b94a2ed215ec870e95c1eed1917eec111c22b8a6c83720f674f49bb03</cites><orcidid>0000-0003-2872-9197 ; 0000-0002-2811-4638</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0045653524029436$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/39736363$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Oladoye, Peter Olusakin</creatorcontrib><creatorcontrib>Liu, Guangliang</creatorcontrib><creatorcontrib>Zhang, Qingzhe</creatorcontrib><creatorcontrib>Cai, Yong</creatorcontrib><title>Reduction and amalgamation of mercury in silver nanoparticle suspensions under dark conditions</title><title>Chemosphere (Oxford)</title><addtitle>Chemosphere</addtitle><description>Mercury (Hg) is a global pollutant of concern, and its transport and transformation are controlled by various environmental factors, with aquatic particles being an important driver. Understanding the interactions between silver nanoparticles (AgNPs) and Hg under dark condition is a prerequisite for studying the extent of AgNPs interaction with light and its participation in Hg biogeochemical cycling. Herein, under laboratory experimental setting, it was found that the reduction of divalent Hg (Hg(II)) to gaseous elemental Hg (Hg0) by AgNPs readily occurred. Within 30 min, less than 20% of Hg(II) were reduced to Hg0, with more than 80% remaining in solution. The Hg0 generated distributed between AgNPs and aqueous phase with very small amount (<1%) released as purgeable Hg0 and a substantial amount (6.28–15.7%) amalgamated to AgNPs to form Ag–Hg amalgam. The exposure of AgNPs to Hg(II) resulted in blueshift in maximum wavelength of absorption of AgNPs due to Ag–Hg amalgam formation. Also, we found a decrease in the visible light absorption and an increase in the size of AgNPs due to redox interaction between AgNPs and Hg(II) and the increase in suspension ionic strength, respectively. Overall, our findings provide essential insights into the behavior of AgNPs on exposure to Hg(II) and suggest that AgNPs could significantly impact the biogeochemical cycling of Hg.
[Display omitted]
•Interaction of Hg(II) with silver nanoparticles (AgNPs) reduces Hg(II) to Hg(0).•Distribution between AgNPs and solution makes purgeable Hg(0) a minor fraction.•Produced Hg(0) is mainly present in the form of amalgamation with AgNPs.•Exposure of AgNPs to Hg(II) results in blueshift in surface plasmon resonance.</description><subject>Biogeochemical cycling</subject><subject>Characterization</subject><subject>Mercury</subject><subject>Mercury - chemistry</subject><subject>Mercury-silver interaction</subject><subject>Metal Nanoparticles - chemistry</subject><subject>Oxidation-Reduction</subject><subject>Silver - chemistry</subject><subject>Silver nanoparticles</subject><subject>Suspensions</subject><subject>Water Pollutants, Chemical - chemistry</subject><issn>0045-6535</issn><issn>1879-1298</issn><issn>1879-1298</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2025</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkE1LxDAQhoMoun78BYk3L10zTdM2R1n8AkEQvRrSZKpZ26QmW8F_b9dV8SiBBCbPO8M8hJwAmwOD8mw5Ny_YhzS8YMR5zvJiDkXBuNgiM6grmUEu620yY6wQWSm42CP7KS0Zm8JC7pI9LiteTmdGnu7RjmblgqfaW6p73T1P11chtLTHaMb4QZ2nyXXvGKnXPgw6rpzpkKYxDejTBCc6ejt9Wx1fqQneunWLdEh2Wt0lPPp-D8jj5cXD4jq7vbu6WZzfZgbKkmcgJWOSi0YWOkebg0BTVwylMIBoQUKFaADA5HlT69LUvMpZW1ZFW8imYfyAnG76DjG8jZhWqnfJYNdpj2FMioNgvBAVW6Nyg5oYUorYqiG6XscPBUyt9aql-qNXrfWqjd4pe_w9Zmx6tL_JH58TsNgAOC377jCqZBx6g9ZFNCtlg_vHmE-nD5Lk</recordid><startdate>202502</startdate><enddate>202502</enddate><creator>Oladoye, Peter Olusakin</creator><creator>Liu, Guangliang</creator><creator>Zhang, Qingzhe</creator><creator>Cai, Yong</creator><general>Elsevier Ltd</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-2872-9197</orcidid><orcidid>https://orcid.org/0000-0002-2811-4638</orcidid></search><sort><creationdate>202502</creationdate><title>Reduction and amalgamation of mercury in silver nanoparticle suspensions under dark conditions</title><author>Oladoye, Peter Olusakin ; Liu, Guangliang ; Zhang, Qingzhe ; Cai, Yong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c1663-19900935b94a2ed215ec870e95c1eed1917eec111c22b8a6c83720f674f49bb03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2025</creationdate><topic>Biogeochemical cycling</topic><topic>Characterization</topic><topic>Mercury</topic><topic>Mercury - chemistry</topic><topic>Mercury-silver interaction</topic><topic>Metal Nanoparticles - chemistry</topic><topic>Oxidation-Reduction</topic><topic>Silver - chemistry</topic><topic>Silver nanoparticles</topic><topic>Suspensions</topic><topic>Water Pollutants, Chemical - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Oladoye, Peter Olusakin</creatorcontrib><creatorcontrib>Liu, Guangliang</creatorcontrib><creatorcontrib>Zhang, Qingzhe</creatorcontrib><creatorcontrib>Cai, Yong</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Chemosphere (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Oladoye, Peter Olusakin</au><au>Liu, Guangliang</au><au>Zhang, Qingzhe</au><au>Cai, Yong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reduction and amalgamation of mercury in silver nanoparticle suspensions under dark conditions</atitle><jtitle>Chemosphere (Oxford)</jtitle><addtitle>Chemosphere</addtitle><date>2025-02</date><risdate>2025</risdate><volume>371</volume><spage>144035</spage><pages>144035-</pages><artnum>144035</artnum><issn>0045-6535</issn><issn>1879-1298</issn><eissn>1879-1298</eissn><abstract>Mercury (Hg) is a global pollutant of concern, and its transport and transformation are controlled by various environmental factors, with aquatic particles being an important driver. Understanding the interactions between silver nanoparticles (AgNPs) and Hg under dark condition is a prerequisite for studying the extent of AgNPs interaction with light and its participation in Hg biogeochemical cycling. Herein, under laboratory experimental setting, it was found that the reduction of divalent Hg (Hg(II)) to gaseous elemental Hg (Hg0) by AgNPs readily occurred. Within 30 min, less than 20% of Hg(II) were reduced to Hg0, with more than 80% remaining in solution. The Hg0 generated distributed between AgNPs and aqueous phase with very small amount (<1%) released as purgeable Hg0 and a substantial amount (6.28–15.7%) amalgamated to AgNPs to form Ag–Hg amalgam. The exposure of AgNPs to Hg(II) resulted in blueshift in maximum wavelength of absorption of AgNPs due to Ag–Hg amalgam formation. Also, we found a decrease in the visible light absorption and an increase in the size of AgNPs due to redox interaction between AgNPs and Hg(II) and the increase in suspension ionic strength, respectively. Overall, our findings provide essential insights into the behavior of AgNPs on exposure to Hg(II) and suggest that AgNPs could significantly impact the biogeochemical cycling of Hg.
[Display omitted]
•Interaction of Hg(II) with silver nanoparticles (AgNPs) reduces Hg(II) to Hg(0).•Distribution between AgNPs and solution makes purgeable Hg(0) a minor fraction.•Produced Hg(0) is mainly present in the form of amalgamation with AgNPs.•Exposure of AgNPs to Hg(II) results in blueshift in surface plasmon resonance.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>39736363</pmid><doi>10.1016/j.chemosphere.2024.144035</doi><orcidid>https://orcid.org/0000-0003-2872-9197</orcidid><orcidid>https://orcid.org/0000-0002-2811-4638</orcidid></addata></record> |
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| subjects | Biogeochemical cycling Characterization Mercury Mercury - chemistry Mercury-silver interaction Metal Nanoparticles - chemistry Oxidation-Reduction Silver - chemistry Silver nanoparticles Suspensions Water Pollutants, Chemical - chemistry |
| title | Reduction and amalgamation of mercury in silver nanoparticle suspensions under dark conditions |
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