A Two-Front Leach Model for Cement-Stabilized Heavy Metal Waste
Quantitative scanning electron microscope (SEM) studies of cement-stabilized waste specimens exposed to a leaching solution at constant pH in the range 4−7 have shown that the acid neutralization capacity (ANC) of the waste matrix is consumed at two consecutive leaching fronts. The first front is as...
Gespeichert in:
| Veröffentlicht in: | Environmental science & technology 2004-03, Vol.38 (5), p.1522-1528 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 1528 |
|---|---|
| container_issue | 5 |
| container_start_page | 1522 |
| container_title | Environmental science & technology |
| container_volume | 38 |
| creator | Islam, Mohammad Z Catalan, Lionel J. J Yanful, Ernest K |
| description | Quantitative scanning electron microscope (SEM) studies of cement-stabilized waste specimens exposed to a leaching solution at constant pH in the range 4−7 have shown that the acid neutralization capacity (ANC) of the waste matrix is consumed at two consecutive leaching fronts. The first front is associated with the dissolution of portlandite (Ca(OH)2) and the partial reaction of calcium silicate hydrate (CSH) gel. The second front marks the dissolution of Ca−Al hydroxy sulfate minerals. The advancement of the first front is limited by the diffusion of OH- ions from the first front toward the leaching solution. The advancement of the second front, however, is controlled by the diffusion of H+ ions from the leaching solution toward the second front. Leaching of copper, zinc, and lead only occurs between the second front and the specimen surface. The leaching behavior of metals is modeled by considering that metals are leached from the waste matrix as a result of the advancement of the second front. The proposed model takes into account the leachable metal fraction in the waste matrix and the effect of metal remineralization on metal mobility. |
| doi_str_mv | 10.1021/es0348400 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_16178249</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>653127591</sourcerecordid><originalsourceid>FETCH-LOGICAL-a503t-4d7161c70622625dfeec30feec26c192ede60297a4e5649730da6018dab387d23</originalsourceid><addsrcrecordid>eNpl0E1P3DAQBmCrKioL9NA_UEWVisQhdGzHdnJCaMWXWAoSW-BmzdoTNTSbbO0sX7-erHbFovbiOfjRq5mXsS8c9jkI_oMiyCzPAD6wAVcCUpUr_pENALhMC6nvNtlWjPcAICTkn9gmV5BpqdSAHRwm48c2PQ5t0yUjQvc7uWg91UnZhmRIU2q69LrDSVVXL-STU8KH5-SCOqyTW4wd7bCNEutIn1dzm_06PhoPT9PR5cnZ8HCUogLZpZk3XHNnQAuhhfIlkZOweIV2vBDkSYMoDGakdFYYCR418NzjRObGC7nNdpe5s9D-nVPs7LSKjuoaG2rn0fbpJhdZ0cNv_8D7dh6afjfbH88laJP3aG-JXGhjDFTaWaimGJ4tB7uo1L5V2tuvq8D5ZEp-LVcd9uD7CmB0WJcBG1fFd04JXcjFZunSVX1vT2__GP5YbaRRdnx1bW_USXH1c3xrz9e56OL6iP8XfAWuCZV1</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>230130678</pqid></control><display><type>article</type><title>A Two-Front Leach Model for Cement-Stabilized Heavy Metal Waste</title><source>MEDLINE</source><source>ACS Publications</source><creator>Islam, Mohammad Z ; Catalan, Lionel J. J ; Yanful, Ernest K</creator><creatorcontrib>Islam, Mohammad Z ; Catalan, Lionel J. J ; Yanful, Ernest K</creatorcontrib><description>Quantitative scanning electron microscope (SEM) studies of cement-stabilized waste specimens exposed to a leaching solution at constant pH in the range 4−7 have shown that the acid neutralization capacity (ANC) of the waste matrix is consumed at two consecutive leaching fronts. The first front is associated with the dissolution of portlandite (Ca(OH)2) and the partial reaction of calcium silicate hydrate (CSH) gel. The second front marks the dissolution of Ca−Al hydroxy sulfate minerals. The advancement of the first front is limited by the diffusion of OH- ions from the first front toward the leaching solution. The advancement of the second front, however, is controlled by the diffusion of H+ ions from the leaching solution toward the second front. Leaching of copper, zinc, and lead only occurs between the second front and the specimen surface. The leaching behavior of metals is modeled by considering that metals are leached from the waste matrix as a result of the advancement of the second front. The proposed model takes into account the leachable metal fraction in the waste matrix and the effect of metal remineralization on metal mobility.</description><identifier>ISSN: 0013-936X</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/es0348400</identifier><identifier>PMID: 15046355</identifier><identifier>CODEN: ESTHAG</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Construction Materials ; Diffusion ; Ecology ; Electron microscopes ; Environmental Monitoring ; Exact sciences and technology ; General treatment and storage processes ; Heavy metal content ; Leaching ; Metals, Heavy - analysis ; Metals, Heavy - chemistry ; Microscopy, Electron, Scanning ; Models, Theoretical ; Pollution ; Refuse Disposal - methods ; Soil Pollutants - analysis ; Waste materials ; Wastes ; Water Pollutants - analysis</subject><ispartof>Environmental science & technology, 2004-03, Vol.38 (5), p.1522-1528</ispartof><rights>Copyright © 2004 American Chemical Society</rights><rights>2004 INIST-CNRS</rights><rights>Copyright American Chemical Society Mar 1, 2004</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a503t-4d7161c70622625dfeec30feec26c192ede60297a4e5649730da6018dab387d23</citedby><cites>FETCH-LOGICAL-a503t-4d7161c70622625dfeec30feec26c192ede60297a4e5649730da6018dab387d23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/es0348400$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/es0348400$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,2765,27076,27924,27925,56738,56788</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15526939$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15046355$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Islam, Mohammad Z</creatorcontrib><creatorcontrib>Catalan, Lionel J. J</creatorcontrib><creatorcontrib>Yanful, Ernest K</creatorcontrib><title>A Two-Front Leach Model for Cement-Stabilized Heavy Metal Waste</title><title>Environmental science & technology</title><addtitle>Environ. Sci. Technol</addtitle><description>Quantitative scanning electron microscope (SEM) studies of cement-stabilized waste specimens exposed to a leaching solution at constant pH in the range 4−7 have shown that the acid neutralization capacity (ANC) of the waste matrix is consumed at two consecutive leaching fronts. The first front is associated with the dissolution of portlandite (Ca(OH)2) and the partial reaction of calcium silicate hydrate (CSH) gel. The second front marks the dissolution of Ca−Al hydroxy sulfate minerals. The advancement of the first front is limited by the diffusion of OH- ions from the first front toward the leaching solution. The advancement of the second front, however, is controlled by the diffusion of H+ ions from the leaching solution toward the second front. Leaching of copper, zinc, and lead only occurs between the second front and the specimen surface. The leaching behavior of metals is modeled by considering that metals are leached from the waste matrix as a result of the advancement of the second front. The proposed model takes into account the leachable metal fraction in the waste matrix and the effect of metal remineralization on metal mobility.</description><subject>Applied sciences</subject><subject>Construction Materials</subject><subject>Diffusion</subject><subject>Ecology</subject><subject>Electron microscopes</subject><subject>Environmental Monitoring</subject><subject>Exact sciences and technology</subject><subject>General treatment and storage processes</subject><subject>Heavy metal content</subject><subject>Leaching</subject><subject>Metals, Heavy - analysis</subject><subject>Metals, Heavy - chemistry</subject><subject>Microscopy, Electron, Scanning</subject><subject>Models, Theoretical</subject><subject>Pollution</subject><subject>Refuse Disposal - methods</subject><subject>Soil Pollutants - analysis</subject><subject>Waste materials</subject><subject>Wastes</subject><subject>Water Pollutants - analysis</subject><issn>0013-936X</issn><issn>1520-5851</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpl0E1P3DAQBmCrKioL9NA_UEWVisQhdGzHdnJCaMWXWAoSW-BmzdoTNTSbbO0sX7-erHbFovbiOfjRq5mXsS8c9jkI_oMiyCzPAD6wAVcCUpUr_pENALhMC6nvNtlWjPcAICTkn9gmV5BpqdSAHRwm48c2PQ5t0yUjQvc7uWg91UnZhmRIU2q69LrDSVVXL-STU8KH5-SCOqyTW4wd7bCNEutIn1dzm_06PhoPT9PR5cnZ8HCUogLZpZk3XHNnQAuhhfIlkZOweIV2vBDkSYMoDGakdFYYCR418NzjRObGC7nNdpe5s9D-nVPs7LSKjuoaG2rn0fbpJhdZ0cNv_8D7dh6afjfbH88laJP3aG-JXGhjDFTaWaimGJ4tB7uo1L5V2tuvq8D5ZEp-LVcd9uD7CmB0WJcBG1fFd04JXcjFZunSVX1vT2__GP5YbaRRdnx1bW_USXH1c3xrz9e56OL6iP8XfAWuCZV1</recordid><startdate>20040301</startdate><enddate>20040301</enddate><creator>Islam, Mohammad Z</creator><creator>Catalan, Lionel J. J</creator><creator>Yanful, Ernest K</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>IQODW</scope><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>7QO</scope><scope>7ST</scope><scope>7T7</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>SOI</scope><scope>7TV</scope></search><sort><creationdate>20040301</creationdate><title>A Two-Front Leach Model for Cement-Stabilized Heavy Metal Waste</title><author>Islam, Mohammad Z ; Catalan, Lionel J. J ; Yanful, Ernest K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a503t-4d7161c70622625dfeec30feec26c192ede60297a4e5649730da6018dab387d23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Applied sciences</topic><topic>Construction Materials</topic><topic>Diffusion</topic><topic>Ecology</topic><topic>Electron microscopes</topic><topic>Environmental Monitoring</topic><topic>Exact sciences and technology</topic><topic>General treatment and storage processes</topic><topic>Heavy metal content</topic><topic>Leaching</topic><topic>Metals, Heavy - analysis</topic><topic>Metals, Heavy - chemistry</topic><topic>Microscopy, Electron, Scanning</topic><topic>Models, Theoretical</topic><topic>Pollution</topic><topic>Refuse Disposal - methods</topic><topic>Soil Pollutants - analysis</topic><topic>Waste materials</topic><topic>Wastes</topic><topic>Water Pollutants - analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Islam, Mohammad Z</creatorcontrib><creatorcontrib>Catalan, Lionel J. J</creatorcontrib><creatorcontrib>Yanful, Ernest K</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><jtitle>Environmental science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Islam, Mohammad Z</au><au>Catalan, Lionel J. J</au><au>Yanful, Ernest K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A Two-Front Leach Model for Cement-Stabilized Heavy Metal Waste</atitle><jtitle>Environmental science & technology</jtitle><addtitle>Environ. Sci. Technol</addtitle><date>2004-03-01</date><risdate>2004</risdate><volume>38</volume><issue>5</issue><spage>1522</spage><epage>1528</epage><pages>1522-1528</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><coden>ESTHAG</coden><abstract>Quantitative scanning electron microscope (SEM) studies of cement-stabilized waste specimens exposed to a leaching solution at constant pH in the range 4−7 have shown that the acid neutralization capacity (ANC) of the waste matrix is consumed at two consecutive leaching fronts. The first front is associated with the dissolution of portlandite (Ca(OH)2) and the partial reaction of calcium silicate hydrate (CSH) gel. The second front marks the dissolution of Ca−Al hydroxy sulfate minerals. The advancement of the first front is limited by the diffusion of OH- ions from the first front toward the leaching solution. The advancement of the second front, however, is controlled by the diffusion of H+ ions from the leaching solution toward the second front. Leaching of copper, zinc, and lead only occurs between the second front and the specimen surface. The leaching behavior of metals is modeled by considering that metals are leached from the waste matrix as a result of the advancement of the second front. The proposed model takes into account the leachable metal fraction in the waste matrix and the effect of metal remineralization on metal mobility.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>15046355</pmid><doi>10.1021/es0348400</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0013-936X |
| ispartof | Environmental science & technology, 2004-03, Vol.38 (5), p.1522-1528 |
| issn | 0013-936X 1520-5851 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_16178249 |
| source | MEDLINE; ACS Publications |
| subjects | Applied sciences Construction Materials Diffusion Ecology Electron microscopes Environmental Monitoring Exact sciences and technology General treatment and storage processes Heavy metal content Leaching Metals, Heavy - analysis Metals, Heavy - chemistry Microscopy, Electron, Scanning Models, Theoretical Pollution Refuse Disposal - methods Soil Pollutants - analysis Waste materials Wastes Water Pollutants - analysis |
| title | A Two-Front Leach Model for Cement-Stabilized Heavy Metal Waste |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-06T05%3A53%3A10IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=A%20Two-Front%20Leach%20Model%20for%20Cement-Stabilized%20Heavy%20Metal%20Waste&rft.jtitle=Environmental%20science%20&%20technology&rft.au=Islam,%20Mohammad%20Z&rft.date=2004-03-01&rft.volume=38&rft.issue=5&rft.spage=1522&rft.epage=1528&rft.pages=1522-1528&rft.issn=0013-936X&rft.eissn=1520-5851&rft.coden=ESTHAG&rft_id=info:doi/10.1021/es0348400&rft_dat=%3Cproquest_cross%3E653127591%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=230130678&rft_id=info:pmid/15046355&rfr_iscdi=true |