Diffusion behavior of Se(IV) and Re(VII) in GMZ bentonite
The diffusion behavior of HSeO sub(3) super(-) and ReO sub(4) super(-) was investigated in Gaomiaozi (GMZ) bentonite by the through-diffusion method. The effective diffusion coefficient D sub(e), porosity epsilon and rock capacity factor alpha were measured in order to evaluate the impact of porosit...
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| Veröffentlicht in: | Applied clay science 2014-11, Vol.101, p.136-140 |
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| creator | TAO WU HAI WANG QING ZHENG YAO LIN ZHAO VAN LOON, Luc R |
| description | The diffusion behavior of HSeO sub(3) super(-) and ReO sub(4) super(-) was investigated in Gaomiaozi (GMZ) bentonite by the through-diffusion method. The effective diffusion coefficient D sub(e), porosity epsilon and rock capacity factor alpha were measured in order to evaluate the impact of porosity on anion diffusion in compacted bentonite. The D sub(e) values of HSeO sub(3) super(-) and ReO sub(4) super(-) were (4.5-54) 10 super(- 12) and (3.0-53) 10 super(- 12) m super(2)/s at dry densities from 1300 to 1800 kg/m super(3), respectively. HSeO sub(3) super(-) sorbed on GMZ bentonite with a distribution coefficient K sub(d) in the range of (1.4-1.8) 10 super(- 4) m super(3)/kg, whereas ReO sub(4) super(-) showed little sorption. Moreover, the diffusion behavior of HSeO sub(3) super(-) and ReO sub(4) super(-) was similar to that of SeO sub(3) super(2-)and super(99)TcO sub(4) super(-). Since the minimum average pore diameter at a bulk dry density below 1800 kg/m super(3) is much larger than that of anions, the constrictivity delta could be neglected. The D sub(e) or the apparent diffusion coefficient D sub(a) was related to porosity epsilon by Archie's law and by a pore diffusion model with linear and logarithmic relations between tau and epsilon . The best fit was obtained by Archie's relation. |
| doi_str_mv | 10.1016/j.clay.2014.07.028 |
| format | Article |
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The effective diffusion coefficient D sub(e), porosity epsilon and rock capacity factor alpha were measured in order to evaluate the impact of porosity on anion diffusion in compacted bentonite. The D sub(e) values of HSeO sub(3) super(-) and ReO sub(4) super(-) were (4.5-54) 10 super(- 12) and (3.0-53) 10 super(- 12) m super(2)/s at dry densities from 1300 to 1800 kg/m super(3), respectively. HSeO sub(3) super(-) sorbed on GMZ bentonite with a distribution coefficient K sub(d) in the range of (1.4-1.8) 10 super(- 4) m super(3)/kg, whereas ReO sub(4) super(-) showed little sorption. Moreover, the diffusion behavior of HSeO sub(3) super(-) and ReO sub(4) super(-) was similar to that of SeO sub(3) super(2-)and super(99)TcO sub(4) super(-). Since the minimum average pore diameter at a bulk dry density below 1800 kg/m super(3) is much larger than that of anions, the constrictivity delta could be neglected. The D sub(e) or the apparent diffusion coefficient D sub(a) was related to porosity epsilon by Archie's law and by a pore diffusion model with linear and logarithmic relations between tau and epsilon . The best fit was obtained by Archie's relation.</description><identifier>ISSN: 0169-1317</identifier><identifier>EISSN: 1872-9053</identifier><identifier>DOI: 10.1016/j.clay.2014.07.028</identifier><identifier>CODEN: ACLSER</identifier><language>eng</language><publisher>Kidlington: Elsevier</publisher><subject>Anions ; Bentonite ; Capacity factor ; Density ; Diffusion ; Diffusion coefficient ; Drying ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Mineralogy ; Porosity ; Silicates</subject><ispartof>Applied clay science, 2014-11, Vol.101, p.136-140</ispartof><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-2f76f9ea49cbc124aeaf8b0d2952ea34637bd84b8b399ed247f1f1afa133e0343</citedby><cites>FETCH-LOGICAL-c380t-2f76f9ea49cbc124aeaf8b0d2952ea34637bd84b8b399ed247f1f1afa133e0343</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=28851179$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>TAO WU</creatorcontrib><creatorcontrib>HAI WANG</creatorcontrib><creatorcontrib>QING ZHENG</creatorcontrib><creatorcontrib>YAO LIN ZHAO</creatorcontrib><creatorcontrib>VAN LOON, Luc R</creatorcontrib><title>Diffusion behavior of Se(IV) and Re(VII) in GMZ bentonite</title><title>Applied clay science</title><description>The diffusion behavior of HSeO sub(3) super(-) and ReO sub(4) super(-) was investigated in Gaomiaozi (GMZ) bentonite by the through-diffusion method. The effective diffusion coefficient D sub(e), porosity epsilon and rock capacity factor alpha were measured in order to evaluate the impact of porosity on anion diffusion in compacted bentonite. The D sub(e) values of HSeO sub(3) super(-) and ReO sub(4) super(-) were (4.5-54) 10 super(- 12) and (3.0-53) 10 super(- 12) m super(2)/s at dry densities from 1300 to 1800 kg/m super(3), respectively. HSeO sub(3) super(-) sorbed on GMZ bentonite with a distribution coefficient K sub(d) in the range of (1.4-1.8) 10 super(- 4) m super(3)/kg, whereas ReO sub(4) super(-) showed little sorption. Moreover, the diffusion behavior of HSeO sub(3) super(-) and ReO sub(4) super(-) was similar to that of SeO sub(3) super(2-)and super(99)TcO sub(4) super(-). Since the minimum average pore diameter at a bulk dry density below 1800 kg/m super(3) is much larger than that of anions, the constrictivity delta could be neglected. The D sub(e) or the apparent diffusion coefficient D sub(a) was related to porosity epsilon by Archie's law and by a pore diffusion model with linear and logarithmic relations between tau and epsilon . The best fit was obtained by Archie's relation.</description><subject>Anions</subject><subject>Bentonite</subject><subject>Capacity factor</subject><subject>Density</subject><subject>Diffusion</subject><subject>Diffusion coefficient</subject><subject>Drying</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Mineralogy</subject><subject>Porosity</subject><subject>Silicates</subject><issn>0169-1317</issn><issn>1872-9053</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNo9kL1OwzAURi0EEqXwAkxZkNohwdd2YntEBUqlIiR-OrBYN44tXKVJiVOkvj2pipi-5XxnOIRcA82AQnG7zmyN-4xREBmVGWXqhIxASZZqmvNTMhognQIHeU4uYlxTCkzlekT0ffB-F0PbJKX7wp_Qdknrkzc3WaymCTZV8uomq8VimoQmmT9_DlTTt03o3SU581hHd_W3Y_Lx-PA-e0qXL_PF7G6ZWq5onzIvC68dCm1LC0ygQ69KWjGdM4dcFFyWlRKlKrnWrmJCevCAHoFzR7ngYzI5erdd-71zsTebEK2ra2xcu4sGioJSJQvBBpQdUdu1MXbOm20XNtjtDVBz6GTW5tDJHDoZKs3QaTjd_PkxWqx9h40N8f_JlMoBpOa_NlRnOQ</recordid><startdate>20141101</startdate><enddate>20141101</enddate><creator>TAO WU</creator><creator>HAI WANG</creator><creator>QING ZHENG</creator><creator>YAO LIN ZHAO</creator><creator>VAN LOON, Luc R</creator><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20141101</creationdate><title>Diffusion behavior of Se(IV) and Re(VII) in GMZ bentonite</title><author>TAO WU ; HAI WANG ; QING ZHENG ; YAO LIN ZHAO ; VAN LOON, Luc R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-2f76f9ea49cbc124aeaf8b0d2952ea34637bd84b8b399ed247f1f1afa133e0343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Anions</topic><topic>Bentonite</topic><topic>Capacity factor</topic><topic>Density</topic><topic>Diffusion</topic><topic>Diffusion coefficient</topic><topic>Drying</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Mineralogy</topic><topic>Porosity</topic><topic>Silicates</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>TAO WU</creatorcontrib><creatorcontrib>HAI WANG</creatorcontrib><creatorcontrib>QING ZHENG</creatorcontrib><creatorcontrib>YAO LIN ZHAO</creatorcontrib><creatorcontrib>VAN LOON, Luc R</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Applied clay science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>TAO WU</au><au>HAI WANG</au><au>QING ZHENG</au><au>YAO LIN ZHAO</au><au>VAN LOON, Luc R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Diffusion behavior of Se(IV) and Re(VII) in GMZ bentonite</atitle><jtitle>Applied clay science</jtitle><date>2014-11-01</date><risdate>2014</risdate><volume>101</volume><spage>136</spage><epage>140</epage><pages>136-140</pages><issn>0169-1317</issn><eissn>1872-9053</eissn><coden>ACLSER</coden><abstract>The diffusion behavior of HSeO sub(3) super(-) and ReO sub(4) super(-) was investigated in Gaomiaozi (GMZ) bentonite by the through-diffusion method. The effective diffusion coefficient D sub(e), porosity epsilon and rock capacity factor alpha were measured in order to evaluate the impact of porosity on anion diffusion in compacted bentonite. The D sub(e) values of HSeO sub(3) super(-) and ReO sub(4) super(-) were (4.5-54) 10 super(- 12) and (3.0-53) 10 super(- 12) m super(2)/s at dry densities from 1300 to 1800 kg/m super(3), respectively. HSeO sub(3) super(-) sorbed on GMZ bentonite with a distribution coefficient K sub(d) in the range of (1.4-1.8) 10 super(- 4) m super(3)/kg, whereas ReO sub(4) super(-) showed little sorption. Moreover, the diffusion behavior of HSeO sub(3) super(-) and ReO sub(4) super(-) was similar to that of SeO sub(3) super(2-)and super(99)TcO sub(4) super(-). Since the minimum average pore diameter at a bulk dry density below 1800 kg/m super(3) is much larger than that of anions, the constrictivity delta could be neglected. The D sub(e) or the apparent diffusion coefficient D sub(a) was related to porosity epsilon by Archie's law and by a pore diffusion model with linear and logarithmic relations between tau and epsilon . The best fit was obtained by Archie's relation.</abstract><cop>Kidlington</cop><pub>Elsevier</pub><doi>10.1016/j.clay.2014.07.028</doi><tpages>5</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Anions Bentonite Capacity factor Density Diffusion Diffusion coefficient Drying Earth sciences Earth, ocean, space Exact sciences and technology Mineralogy Porosity Silicates |
| title | Diffusion behavior of Se(IV) and Re(VII) in GMZ bentonite |
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