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Fast copper extraction from printed circuit boards using supercritical carbon dioxide
•Alternative technology to recycling PCBs.•Supercritical CO2 with H2SO4 and H2O2 was efficient to Cu recovering from PCBs.•Supercritical extraction was 9 times faster than an atmospheric extraction.•Cu supercritical CO2 extraction without H2O2 did not was efficient.•About 90% of Cu was recovered in...
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| Published in: | Waste management (Elmsford) 2015-11, Vol.45, p.289-297 |
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| Main Authors: | , , , , , |
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| cited_by | cdi_FETCH-LOGICAL-c568t-55f576a866da31ba6e67d17f872a21a11167b3e369303c491587525ec60ff16b3 |
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| cites | cdi_FETCH-LOGICAL-c568t-55f576a866da31ba6e67d17f872a21a11167b3e369303c491587525ec60ff16b3 |
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| container_start_page | 289 |
| container_title | Waste management (Elmsford) |
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| creator | Calgaro, C.O. Schlemmer, D.F. da Silva, M.D.C.R. Maziero, E.V. Tanabe, E.H. Bertuol, D.A. |
| description | •Alternative technology to recycling PCBs.•Supercritical CO2 with H2SO4 and H2O2 was efficient to Cu recovering from PCBs.•Supercritical extraction was 9 times faster than an atmospheric extraction.•Cu supercritical CO2 extraction without H2O2 did not was efficient.•About 90% of Cu was recovered in 20min with supercritical CO2 modified.
Technological development and intensive marketing support the growth in demand for electrical and electronic equipment (EEE), for which printed circuit boards (PCBs) are vital components. As these devices become obsolete after short periods, waste PCBs present a problem and require recycling. PCBs are composed of ceramics, polymers, and metals, particularly Cu, which is present in highest percentages. The aim of this study was to develop an innovative method to recover Cu from the PCBs of old mobile phones, obtaining faster reaction kinetics by means of leaching with supercritical CO2 and co-solvents. The PCBs from waste mobile phones were characterized, and evaluation was made of the reaction kinetics during leaching at atmospheric pressure and using supercritical CO2 with H2O2 and H2SO4 as co-solvents. The results showed that the PCBs contained 34.83wt% of Cu. It was found that the supercritical extraction was 9 times faster, compared to atmospheric pressure extraction. After 20min of supercritical leaching, approximately 90% of the Cu contained in the PCB was extracted using a 1:20 solid:liquid ratio and 20% of H2O2 and H2SO4 (2.5M). These results demonstrate the efficiency of the process. Therefore the supercritical CO2 employment in the PCBs recycling is a promising alternative and the CO2 is environmentally acceptable and reusable. |
| doi_str_mv | 10.1016/j.wasman.2015.05.017 |
| format | article |
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Technological development and intensive marketing support the growth in demand for electrical and electronic equipment (EEE), for which printed circuit boards (PCBs) are vital components. As these devices become obsolete after short periods, waste PCBs present a problem and require recycling. PCBs are composed of ceramics, polymers, and metals, particularly Cu, which is present in highest percentages. The aim of this study was to develop an innovative method to recover Cu from the PCBs of old mobile phones, obtaining faster reaction kinetics by means of leaching with supercritical CO2 and co-solvents. The PCBs from waste mobile phones were characterized, and evaluation was made of the reaction kinetics during leaching at atmospheric pressure and using supercritical CO2 with H2O2 and H2SO4 as co-solvents. The results showed that the PCBs contained 34.83wt% of Cu. It was found that the supercritical extraction was 9 times faster, compared to atmospheric pressure extraction. After 20min of supercritical leaching, approximately 90% of the Cu contained in the PCB was extracted using a 1:20 solid:liquid ratio and 20% of H2O2 and H2SO4 (2.5M). These results demonstrate the efficiency of the process. Therefore the supercritical CO2 employment in the PCBs recycling is a promising alternative and the CO2 is environmentally acceptable and reusable.</description><identifier>ISSN: 0956-053X</identifier><identifier>EISSN: 1879-2456</identifier><identifier>DOI: 10.1016/j.wasman.2015.05.017</identifier><identifier>PMID: 26022338</identifier><language>eng</language><publisher>United States: Elsevier Ltd</publisher><subject>Atmospheric pressure ; Boards ; CARBON DIOXIDE ; Carbon Dioxide - chemistry ; Cell Phone ; CIRCUIT BOARDS ; Copper ; Copper - chemistry ; Cu extraction ; E-waste ; Electronic Waste - analysis ; Environment ; Extraction ; EXTRACTIVE METALLURGY ; Hydrogen Peroxide - analysis ; Leaching ; Mobile phone PCBs ; OXIDES ; PRESSURE ; PRINTED CIRCUITS ; Recycling ; Recycling - methods ; Sulfuric Acids - analysis ; Supercritical CO2 ; Supercritical leaching ; Waste Management - methods</subject><ispartof>Waste management (Elmsford), 2015-11, Vol.45, p.289-297</ispartof><rights>2015 Elsevier Ltd</rights><rights>Copyright © 2015 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c568t-55f576a866da31ba6e67d17f872a21a11167b3e369303c491587525ec60ff16b3</citedby><cites>FETCH-LOGICAL-c568t-55f576a866da31ba6e67d17f872a21a11167b3e369303c491587525ec60ff16b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26022338$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Calgaro, C.O.</creatorcontrib><creatorcontrib>Schlemmer, D.F.</creatorcontrib><creatorcontrib>da Silva, M.D.C.R.</creatorcontrib><creatorcontrib>Maziero, E.V.</creatorcontrib><creatorcontrib>Tanabe, E.H.</creatorcontrib><creatorcontrib>Bertuol, D.A.</creatorcontrib><title>Fast copper extraction from printed circuit boards using supercritical carbon dioxide</title><title>Waste management (Elmsford)</title><addtitle>Waste Manag</addtitle><description>•Alternative technology to recycling PCBs.•Supercritical CO2 with H2SO4 and H2O2 was efficient to Cu recovering from PCBs.•Supercritical extraction was 9 times faster than an atmospheric extraction.•Cu supercritical CO2 extraction without H2O2 did not was efficient.•About 90% of Cu was recovered in 20min with supercritical CO2 modified.
Technological development and intensive marketing support the growth in demand for electrical and electronic equipment (EEE), for which printed circuit boards (PCBs) are vital components. As these devices become obsolete after short periods, waste PCBs present a problem and require recycling. PCBs are composed of ceramics, polymers, and metals, particularly Cu, which is present in highest percentages. The aim of this study was to develop an innovative method to recover Cu from the PCBs of old mobile phones, obtaining faster reaction kinetics by means of leaching with supercritical CO2 and co-solvents. The PCBs from waste mobile phones were characterized, and evaluation was made of the reaction kinetics during leaching at atmospheric pressure and using supercritical CO2 with H2O2 and H2SO4 as co-solvents. The results showed that the PCBs contained 34.83wt% of Cu. It was found that the supercritical extraction was 9 times faster, compared to atmospheric pressure extraction. After 20min of supercritical leaching, approximately 90% of the Cu contained in the PCB was extracted using a 1:20 solid:liquid ratio and 20% of H2O2 and H2SO4 (2.5M). These results demonstrate the efficiency of the process. Therefore the supercritical CO2 employment in the PCBs recycling is a promising alternative and the CO2 is environmentally acceptable and reusable.</description><subject>Atmospheric pressure</subject><subject>Boards</subject><subject>CARBON DIOXIDE</subject><subject>Carbon Dioxide - chemistry</subject><subject>Cell Phone</subject><subject>CIRCUIT BOARDS</subject><subject>Copper</subject><subject>Copper - chemistry</subject><subject>Cu extraction</subject><subject>E-waste</subject><subject>Electronic Waste - analysis</subject><subject>Environment</subject><subject>Extraction</subject><subject>EXTRACTIVE METALLURGY</subject><subject>Hydrogen Peroxide - analysis</subject><subject>Leaching</subject><subject>Mobile phone PCBs</subject><subject>OXIDES</subject><subject>PRESSURE</subject><subject>PRINTED CIRCUITS</subject><subject>Recycling</subject><subject>Recycling - methods</subject><subject>Sulfuric Acids - analysis</subject><subject>Supercritical CO2</subject><subject>Supercritical leaching</subject><subject>Waste Management - methods</subject><issn>0956-053X</issn><issn>1879-2456</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkU-LFDEQxYMo7jj6DURy9NJjVTJJui-CLOsfWPCi4C2kk2rJMN0Zk7Su394Ms3qUhQd1-b168B5jLxF2CKjfHHa_XJndshOAagdNaB6xDfZm6MRe6cdsA4PSHSj57Yo9K-UAgPse4Sm7EhqEkLLfsK_vXancp9OJMqe7mp2vMS18ymnmpxyXSoH7mP0aKx-Ty6HwtcTlOy9rs_gca_TuyL3LY7OFmO5ioOfsyeSOhV7c323Lufly_bG7_fzh0_W7284r3ddOqUkZ7Xqtg5M4Ok3aBDRTb4QT6BBRm1GS1IME6fcDqt4oochrmCbUo9yy15e_p5x-rFSqnWPxdDy6hdJaLBoDEhC0fAAqRS8EDPAAtJFKgzqj-wvqcyol02RbZ7PLvy2CPc9kD_Yykz3PZKGpJW3Zq_uEdZwp_DP93aUBby8AtfZ-Rsq2-EiLpxAz-WpDiv9P-APZ4KSW</recordid><startdate>20151101</startdate><enddate>20151101</enddate><creator>Calgaro, C.O.</creator><creator>Schlemmer, D.F.</creator><creator>da Silva, M.D.C.R.</creator><creator>Maziero, E.V.</creator><creator>Tanabe, E.H.</creator><creator>Bertuol, D.A.</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><scope>7ST</scope><scope>7TV</scope><scope>C1K</scope><scope>SOI</scope><scope>7QQ</scope><scope>8FD</scope><scope>FR3</scope><scope>H8G</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>20151101</creationdate><title>Fast copper extraction from printed circuit boards using supercritical carbon dioxide</title><author>Calgaro, C.O. ; Schlemmer, D.F. ; da Silva, M.D.C.R. ; Maziero, E.V. ; Tanabe, E.H. ; Bertuol, D.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c568t-55f576a866da31ba6e67d17f872a21a11167b3e369303c491587525ec60ff16b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Atmospheric pressure</topic><topic>Boards</topic><topic>CARBON DIOXIDE</topic><topic>Carbon Dioxide - chemistry</topic><topic>Cell Phone</topic><topic>CIRCUIT BOARDS</topic><topic>Copper</topic><topic>Copper - chemistry</topic><topic>Cu extraction</topic><topic>E-waste</topic><topic>Electronic Waste - analysis</topic><topic>Environment</topic><topic>Extraction</topic><topic>EXTRACTIVE METALLURGY</topic><topic>Hydrogen Peroxide - analysis</topic><topic>Leaching</topic><topic>Mobile phone PCBs</topic><topic>OXIDES</topic><topic>PRESSURE</topic><topic>PRINTED CIRCUITS</topic><topic>Recycling</topic><topic>Recycling - methods</topic><topic>Sulfuric Acids - analysis</topic><topic>Supercritical CO2</topic><topic>Supercritical leaching</topic><topic>Waste Management - methods</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Calgaro, C.O.</creatorcontrib><creatorcontrib>Schlemmer, D.F.</creatorcontrib><creatorcontrib>da Silva, M.D.C.R.</creatorcontrib><creatorcontrib>Maziero, E.V.</creatorcontrib><creatorcontrib>Tanabe, E.H.</creatorcontrib><creatorcontrib>Bertuol, D.A.</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><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Ceramic Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Waste management (Elmsford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Calgaro, C.O.</au><au>Schlemmer, D.F.</au><au>da Silva, M.D.C.R.</au><au>Maziero, E.V.</au><au>Tanabe, E.H.</au><au>Bertuol, D.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fast copper extraction from printed circuit boards using supercritical carbon dioxide</atitle><jtitle>Waste management (Elmsford)</jtitle><addtitle>Waste Manag</addtitle><date>2015-11-01</date><risdate>2015</risdate><volume>45</volume><spage>289</spage><epage>297</epage><pages>289-297</pages><issn>0956-053X</issn><eissn>1879-2456</eissn><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>•Alternative technology to recycling PCBs.•Supercritical CO2 with H2SO4 and H2O2 was efficient to Cu recovering from PCBs.•Supercritical extraction was 9 times faster than an atmospheric extraction.•Cu supercritical CO2 extraction without H2O2 did not was efficient.•About 90% of Cu was recovered in 20min with supercritical CO2 modified.
Technological development and intensive marketing support the growth in demand for electrical and electronic equipment (EEE), for which printed circuit boards (PCBs) are vital components. As these devices become obsolete after short periods, waste PCBs present a problem and require recycling. PCBs are composed of ceramics, polymers, and metals, particularly Cu, which is present in highest percentages. The aim of this study was to develop an innovative method to recover Cu from the PCBs of old mobile phones, obtaining faster reaction kinetics by means of leaching with supercritical CO2 and co-solvents. The PCBs from waste mobile phones were characterized, and evaluation was made of the reaction kinetics during leaching at atmospheric pressure and using supercritical CO2 with H2O2 and H2SO4 as co-solvents. The results showed that the PCBs contained 34.83wt% of Cu. It was found that the supercritical extraction was 9 times faster, compared to atmospheric pressure extraction. After 20min of supercritical leaching, approximately 90% of the Cu contained in the PCB was extracted using a 1:20 solid:liquid ratio and 20% of H2O2 and H2SO4 (2.5M). These results demonstrate the efficiency of the process. Therefore the supercritical CO2 employment in the PCBs recycling is a promising alternative and the CO2 is environmentally acceptable and reusable.</abstract><cop>United States</cop><pub>Elsevier Ltd</pub><pmid>26022338</pmid><doi>10.1016/j.wasman.2015.05.017</doi><tpages>9</tpages></addata></record> |
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| ispartof | Waste management (Elmsford), 2015-11, Vol.45, p.289-297 |
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| source | ScienceDirect Freedom Collection |
| subjects | Atmospheric pressure Boards CARBON DIOXIDE Carbon Dioxide - chemistry Cell Phone CIRCUIT BOARDS Copper Copper - chemistry Cu extraction E-waste Electronic Waste - analysis Environment Extraction EXTRACTIVE METALLURGY Hydrogen Peroxide - analysis Leaching Mobile phone PCBs OXIDES PRESSURE PRINTED CIRCUITS Recycling Recycling - methods Sulfuric Acids - analysis Supercritical CO2 Supercritical leaching Waste Management - methods |
| title | Fast copper extraction from printed circuit boards using supercritical carbon dioxide |
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