Cadmium adsorption on iron oxides in the presence of alkaline-earth elements
The influence was studied of the alkaline-earth elements magnesium, calcium, strontium, and barium, at concentrations representative of soil solutions and groundwaters, on cadmium sorption onto iron oxides. Emphasis was placed on the Cd-Ca binary system. In binary-element sorption tests, competition...
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| Veröffentlicht in: | Environmental science & technology 1991-03, Vol.25 (3), p.437-446 |
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| creator | Cowan, Christina E Zachara, John M Resch, Charles T |
| description | The influence was studied of the alkaline-earth elements magnesium, calcium, strontium, and barium, at concentrations representative of soil solutions and groundwaters, on cadmium sorption onto iron oxides. Emphasis was placed on the Cd-Ca binary system. In binary-element sorption tests, competition was observed primarily in Cd-Ca binary mixtures; the extent of competition increased with increasing Ca concentration. In single-element experiments changes in ionic strength affected Ca sorption, implying that a portion of the Ca surface complexes was outer sphere. A triple-layer model, using inner- and outer-sphere complexation reactions, and a nonelectrostatic model incorporating only one adsorption plane, both adequately represented the adsorption of elements and predicted Cd-Ca competition. |
| doi_str_mv | 10.1021/es00015a009 |
| format | Article |
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Emphasis was placed on the Cd-Ca binary system. In binary-element sorption tests, competition was observed primarily in Cd-Ca binary mixtures; the extent of competition increased with increasing Ca concentration. In single-element experiments changes in ionic strength affected Ca sorption, implying that a portion of the Ca surface complexes was outer sphere. 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Sci. Technol</addtitle><description>The influence was studied of the alkaline-earth elements magnesium, calcium, strontium, and barium, at concentrations representative of soil solutions and groundwaters, on cadmium sorption onto iron oxides. Emphasis was placed on the Cd-Ca binary system. In binary-element sorption tests, competition was observed primarily in Cd-Ca binary mixtures; the extent of competition increased with increasing Ca concentration. In single-element experiments changes in ionic strength affected Ca sorption, implying that a portion of the Ca surface complexes was outer sphere. A triple-layer model, using inner- and outer-sphere complexation reactions, and a nonelectrostatic model incorporating only one adsorption plane, both adequately represented the adsorption of elements and predicted Cd-Ca competition.</description><subject>400201 - Chemical & Physicochemical Properties</subject><subject>540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-)</subject><subject>540320 - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)</subject><subject>ADSORPTION</subject><subject>ALKALINE EARTH METALS</subject><subject>BARIUM</subject><subject>CADMIUM</subject><subject>CALCIUM</subject><subject>CHALCOGENIDES</subject><subject>Chemistry</subject><subject>DATA</subject><subject>ELEMENTS</subject><subject>ENVIRONMENTAL SCIENCES</subject><subject>Exact sciences and technology</subject><subject>EXPERIMENTAL DATA</subject><subject>General and physical chemistry</subject><subject>INFORMATION</subject><subject>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</subject><subject>IRON COMPOUNDS</subject><subject>IRON OXIDES</subject><subject>MAGNESIUM</subject><subject>MATHEMATICAL MODELS</subject><subject>METALS</subject><subject>NUMERICAL DATA</subject><subject>OXIDES</subject><subject>OXYGEN COMPOUNDS</subject><subject>Solid-liquid interface</subject><subject>SORPTION</subject><subject>SORPTIVE PROPERTIES</subject><subject>STRONTIUM</subject><subject>Surface physical chemistry</subject><subject>SURFACE PROPERTIES</subject><subject>TRANSITION ELEMENT COMPOUNDS</subject><issn>0013-936X</issn><issn>1520-5851</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1991</creationdate><recordtype>article</recordtype><recordid>eNqF0NGK1DAUBuAgCo6rV75AEdSLpZo0TdNcyqC7i4O6OIJ34Ux6ymS3TcacDKxvb4Yu6oUgBA4kX34OP2PPBX8jeCPeInHOhQLOzQO2EqrhteqVeMhW5VrWRnbfH7MnRDeFNZL3K7ZZwzD741zBQDEdso-hKsen07zzA1LlQ5X3WB0SEgaHVRwrmG5h8gFrhJT3FU44Y8j0lD0aYSJ8dj_P2LcP77fry3rz-eJq_W5TQ2tkrkeNehT94HTZyrWm0Ts39NhwNziHgDul0Q07xyV2RoLoAIXC3nDcDUL1ozxjL5bcSNlbcj6j27sYArpslWp11zYFvVrQIcUfR6RsZ08OpwkCxiNZoYwQQsn_w7bpOtmYAs8X6FIkSjjaQ_IzpJ9WcHvq3_7Vf9Ev72OBHExjguA8_flitOm4aYurF-cp493vd0i3ttNSK7v98tVefvq4vb64NvaU-3rx4MjexGMKpep_bvALaE-hHQ</recordid><startdate>19910301</startdate><enddate>19910301</enddate><creator>Cowan, Christina E</creator><creator>Zachara, John M</creator><creator>Resch, Charles T</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7TV</scope><scope>OTOTI</scope></search><sort><creationdate>19910301</creationdate><title>Cadmium adsorption on iron oxides in the presence of alkaline-earth elements</title><author>Cowan, Christina E ; Zachara, John M ; Resch, Charles T</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a493t-f7e7f18dc7001c4927bcd8e20cdcceaeb57ecdbc03e693a16ae15e890ebd158f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1991</creationdate><topic>400201 - Chemical & Physicochemical Properties</topic><topic>540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-)</topic><topic>540320 - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)</topic><topic>ADSORPTION</topic><topic>ALKALINE EARTH METALS</topic><topic>BARIUM</topic><topic>CADMIUM</topic><topic>CALCIUM</topic><topic>CHALCOGENIDES</topic><topic>Chemistry</topic><topic>DATA</topic><topic>ELEMENTS</topic><topic>ENVIRONMENTAL SCIENCES</topic><topic>Exact sciences and technology</topic><topic>EXPERIMENTAL DATA</topic><topic>General and physical chemistry</topic><topic>INFORMATION</topic><topic>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</topic><topic>IRON COMPOUNDS</topic><topic>IRON OXIDES</topic><topic>MAGNESIUM</topic><topic>MATHEMATICAL MODELS</topic><topic>METALS</topic><topic>NUMERICAL DATA</topic><topic>OXIDES</topic><topic>OXYGEN COMPOUNDS</topic><topic>Solid-liquid interface</topic><topic>SORPTION</topic><topic>SORPTIVE PROPERTIES</topic><topic>STRONTIUM</topic><topic>Surface physical chemistry</topic><topic>SURFACE PROPERTIES</topic><topic>TRANSITION ELEMENT COMPOUNDS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cowan, Christina E</creatorcontrib><creatorcontrib>Zachara, John M</creatorcontrib><creatorcontrib>Resch, Charles T</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>OSTI.GOV</collection><jtitle>Environmental science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cowan, Christina E</au><au>Zachara, John M</au><au>Resch, Charles T</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cadmium adsorption on iron oxides in the presence of alkaline-earth elements</atitle><jtitle>Environmental science & technology</jtitle><addtitle>Environ. Sci. Technol</addtitle><date>1991-03-01</date><risdate>1991</risdate><volume>25</volume><issue>3</issue><spage>437</spage><epage>446</epage><pages>437-446</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><coden>ESTHAG</coden><abstract>The influence was studied of the alkaline-earth elements magnesium, calcium, strontium, and barium, at concentrations representative of soil solutions and groundwaters, on cadmium sorption onto iron oxides. Emphasis was placed on the Cd-Ca binary system. In binary-element sorption tests, competition was observed primarily in Cd-Ca binary mixtures; the extent of competition increased with increasing Ca concentration. In single-element experiments changes in ionic strength affected Ca sorption, implying that a portion of the Ca surface complexes was outer sphere. A triple-layer model, using inner- and outer-sphere complexation reactions, and a nonelectrostatic model incorporating only one adsorption plane, both adequately represented the adsorption of elements and predicted Cd-Ca competition.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/es00015a009</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Environmental science & technology, 1991-03, Vol.25 (3), p.437-446 |
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| source | ACS Publications |
| subjects | 400201 - Chemical & Physicochemical Properties 540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-) 540320 - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-) ADSORPTION ALKALINE EARTH METALS BARIUM CADMIUM CALCIUM CHALCOGENIDES Chemistry DATA ELEMENTS ENVIRONMENTAL SCIENCES Exact sciences and technology EXPERIMENTAL DATA General and physical chemistry INFORMATION INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY IRON COMPOUNDS IRON OXIDES MAGNESIUM MATHEMATICAL MODELS METALS NUMERICAL DATA OXIDES OXYGEN COMPOUNDS Solid-liquid interface SORPTION SORPTIVE PROPERTIES STRONTIUM Surface physical chemistry SURFACE PROPERTIES TRANSITION ELEMENT COMPOUNDS |
| title | Cadmium adsorption on iron oxides in the presence of alkaline-earth elements |
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