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Metal Extraction from Heterogeneous Surfaces Using Carbon Dioxide Microemulsions
We have demonstrated that water in carbon dioxide (w/c) microemulsions extract copper and europium ions from a variety of solid substrates in high yields. The microemulsions are unique from bulk aqueous extractions in that the volume of water used is similar to that of the metal extracted, rather th...
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Published in: | Langmuir 2001-09, Vol.17 (18), p.5458-5463 |
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container_end_page | 5463 |
container_issue | 18 |
container_start_page | 5458 |
container_title | Langmuir |
container_volume | 17 |
creator | Campbell, M. L Apodaca, D. L Yates, M. Z McCleskey, T. M Birnbaum, E. R |
description | We have demonstrated that water in carbon dioxide (w/c) microemulsions extract copper and europium ions from a variety of solid substrates in high yields. The microemulsions are unique from bulk aqueous extractions in that the volume of water used is similar to that of the metal extracted, rather than that of the entire solid substrate, allowing grams of waste to be extracted with microliters of water. The microemulsion enhances wetting without saturation of the solid matrix, allowing almost complete recovery of the metal ions. Our results show that >98% of the metal can be recovered from a filter paper surface in a single extrtaction step. Extraction experiments using wood spiked with metal ions have shown that the microemulsions have enhanced diffusivity compared to bulk water. Pressure changes allow recovery and regeneration of the surfactant; in a test case, 81% of the initial capacity is achieved upon reexposure of the w/c microemulsion to a second batch of copper nitrate. |
doi_str_mv | 10.1021/la0104166 |
format | article |
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L ; Apodaca, D. L ; Yates, M. Z ; McCleskey, T. M ; Birnbaum, E. R</creator><creatorcontrib>Campbell, M. L ; Apodaca, D. L ; Yates, M. Z ; McCleskey, T. M ; Birnbaum, E. R ; Los Alamos National Lab., Los Alamos, NM (US)</creatorcontrib><description>We have demonstrated that water in carbon dioxide (w/c) microemulsions extract copper and europium ions from a variety of solid substrates in high yields. The microemulsions are unique from bulk aqueous extractions in that the volume of water used is similar to that of the metal extracted, rather than that of the entire solid substrate, allowing grams of waste to be extracted with microliters of water. The microemulsion enhances wetting without saturation of the solid matrix, allowing almost complete recovery of the metal ions. Our results show that >98% of the metal can be recovered from a filter paper surface in a single extrtaction step. Extraction experiments using wood spiked with metal ions have shown that the microemulsions have enhanced diffusivity compared to bulk water. Pressure changes allow recovery and regeneration of the surfactant; in a test case, 81% of the initial capacity is achieved upon reexposure of the w/c microemulsion to a second batch of copper nitrate.</description><identifier>ISSN: 0743-7463</identifier><identifier>EISSN: 1520-5827</identifier><identifier>DOI: 10.1021/la0104166</identifier><language>eng</language><publisher>United States: American Chemical Society</publisher><subject>CARBON DIOXIDE ; ENVIRONMENTAL SCIENCES ; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ; MICROEMULSIONS ; PHYSICAL CHEMISTRY</subject><ispartof>Langmuir, 2001-09, Vol.17 (18), p.5458-5463</ispartof><rights>Copyright © 2001 American Chemical Society</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a424t-5a5ad57376ec281d83401cb411ae2626791e86fb2f3d118580b19bd6cf5790153</citedby><cites>FETCH-LOGICAL-a424t-5a5ad57376ec281d83401cb411ae2626791e86fb2f3d118580b19bd6cf5790153</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,315,786,790,891,27957,27958</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/833425$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Campbell, M. L</creatorcontrib><creatorcontrib>Apodaca, D. L</creatorcontrib><creatorcontrib>Yates, M. Z</creatorcontrib><creatorcontrib>McCleskey, T. M</creatorcontrib><creatorcontrib>Birnbaum, E. R</creatorcontrib><creatorcontrib>Los Alamos National Lab., Los Alamos, NM (US)</creatorcontrib><title>Metal Extraction from Heterogeneous Surfaces Using Carbon Dioxide Microemulsions</title><title>Langmuir</title><addtitle>Langmuir</addtitle><description>We have demonstrated that water in carbon dioxide (w/c) microemulsions extract copper and europium ions from a variety of solid substrates in high yields. The microemulsions are unique from bulk aqueous extractions in that the volume of water used is similar to that of the metal extracted, rather than that of the entire solid substrate, allowing grams of waste to be extracted with microliters of water. The microemulsion enhances wetting without saturation of the solid matrix, allowing almost complete recovery of the metal ions. Our results show that >98% of the metal can be recovered from a filter paper surface in a single extrtaction step. Extraction experiments using wood spiked with metal ions have shown that the microemulsions have enhanced diffusivity compared to bulk water. Pressure changes allow recovery and regeneration of the surfactant; in a test case, 81% of the initial capacity is achieved upon reexposure of the w/c microemulsion to a second batch of copper nitrate.</description><subject>CARBON DIOXIDE</subject><subject>ENVIRONMENTAL SCIENCES</subject><subject>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</subject><subject>MICROEMULSIONS</subject><subject>PHYSICAL CHEMISTRY</subject><issn>0743-7463</issn><issn>1520-5827</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><recordid>eNpt0LtOwzAUBmALgUQpDLxBGBgYAr47GVEpFNRCUVvEZjmOU1zSGNmOVN6eoKBOTGf5zn8uAJwjeI0gRje1gghSxPkBGCCGYcoyLA7BAApKUkE5OQYnIWwghDmh-QDMZyaqOhnvolc6WtcklXfbZGKi8W5tGuPakCxaXyltQrIKtlknI-WLDt5Zt7OlSWZWe2e2bR269nAKjipVB3P2V4dgdT9ejibp9OXhcXQ7TRXFNKZMMVUyQQQ3GmeozAiFSBcUIWUwx1zkyGS8KnBFSoQylsEC5UXJdcVEDhEjQ3DR57oQrQzaRqM_tGsao6PMCKH411z1plswBG8q-eXtVvlviaD8fZfcv6uzaW9tiGa3h8p_St6tyeRyvpDiOSPvT2-v3YAhuOy90kFuXOub7tp_cn8AKmt3HQ</recordid><startdate>20010904</startdate><enddate>20010904</enddate><creator>Campbell, M. L</creator><creator>Apodaca, D. L</creator><creator>Yates, M. Z</creator><creator>McCleskey, T. M</creator><creator>Birnbaum, E. R</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>20010904</creationdate><title>Metal Extraction from Heterogeneous Surfaces Using Carbon Dioxide Microemulsions</title><author>Campbell, M. L ; Apodaca, D. L ; Yates, M. Z ; McCleskey, T. M ; Birnbaum, E. 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R</creatorcontrib><creatorcontrib>Los Alamos National Lab., Los Alamos, NM (US)</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Langmuir</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Campbell, M. L</au><au>Apodaca, D. L</au><au>Yates, M. Z</au><au>McCleskey, T. M</au><au>Birnbaum, E. R</au><aucorp>Los Alamos National Lab., Los Alamos, NM (US)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Metal Extraction from Heterogeneous Surfaces Using Carbon Dioxide Microemulsions</atitle><jtitle>Langmuir</jtitle><addtitle>Langmuir</addtitle><date>2001-09-04</date><risdate>2001</risdate><volume>17</volume><issue>18</issue><spage>5458</spage><epage>5463</epage><pages>5458-5463</pages><issn>0743-7463</issn><eissn>1520-5827</eissn><notes>ark:/67375/TPS-7N83XJVQ-8</notes><notes>istex:A7252680D20C2ABD7D0635538A5622719D69EDC8</notes><notes>USDOE Office of Environmental Management (EM) (US)</notes><abstract>We have demonstrated that water in carbon dioxide (w/c) microemulsions extract copper and europium ions from a variety of solid substrates in high yields. The microemulsions are unique from bulk aqueous extractions in that the volume of water used is similar to that of the metal extracted, rather than that of the entire solid substrate, allowing grams of waste to be extracted with microliters of water. The microemulsion enhances wetting without saturation of the solid matrix, allowing almost complete recovery of the metal ions. Our results show that >98% of the metal can be recovered from a filter paper surface in a single extrtaction step. Extraction experiments using wood spiked with metal ions have shown that the microemulsions have enhanced diffusivity compared to bulk water. Pressure changes allow recovery and regeneration of the surfactant; in a test case, 81% of the initial capacity is achieved upon reexposure of the w/c microemulsion to a second batch of copper nitrate.</abstract><cop>United States</cop><pub>American Chemical Society</pub><doi>10.1021/la0104166</doi><tpages>6</tpages></addata></record> |
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source | American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list) |
subjects | CARBON DIOXIDE ENVIRONMENTAL SCIENCES INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY MICROEMULSIONS PHYSICAL CHEMISTRY |
title | Metal Extraction from Heterogeneous Surfaces Using Carbon Dioxide Microemulsions |
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