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The Dissolution of Calcite in Aqueous Acid: The Influence of Humic Species
The kinetics of proton-induced calcite dissolution in aqueous solution in the presence of humic acids and their sodium salts are reported. In equilibrated acid solutions (pH < 4) there is no inhibition by humic material and dissolution proceeds at a rate simply determined by the solution pH. Cont...
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| Published in: | Journal of colloid and interface science 1993-07, Vol.158 (2), p.439-445 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c342t-2eae7f633bba1055c0d2471d4727cf6a7896d4220c18f71cacdfe0bcae4f79c93 |
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| container_end_page | 445 |
| container_issue | 2 |
| container_start_page | 439 |
| container_title | Journal of colloid and interface science |
| container_volume | 158 |
| creator | Compton, Richard G. Sanders, Giles H.W. |
| description | The kinetics of proton-induced calcite dissolution in aqueous solution in the presence of humic acids and their sodium salts are reported. In equilibrated acid solutions (pH < 4) there is no inhibition by humic material and dissolution proceeds at a rate simply determined by the solution pH. Contrastingly the sodium salts of humic acids were found to have a significant inhibitory effect on the acid catalyzed dissolution. This was quantified using a novel channel flow cell experiment which employed two electrodes, the upstream of which was used to inject protons into a neutral solution, which also contained sodium salts of humic acid, via electrolytic oxidation of dissolved hydroquinone. The two electrodes were located immediately upstream and downstream of a calcite crystal so that the proton injection served to dissolve the calcite in the (inhibiting) presence of humic salts unequilibrated with the solution pH. The amount of H+ which survived passage to the downstream "detector" electrode was used to quantify the rate of dissolution and hence the inhibitory effects of the humic acid. The latter were found to operate in a manner not inconsistent with Langmuirian adsorption. |
| doi_str_mv | 10.1006/jcis.1993.1276 |
| format | article |
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In equilibrated acid solutions (pH < 4) there is no inhibition by humic material and dissolution proceeds at a rate simply determined by the solution pH. Contrastingly the sodium salts of humic acids were found to have a significant inhibitory effect on the acid catalyzed dissolution. This was quantified using a novel channel flow cell experiment which employed two electrodes, the upstream of which was used to inject protons into a neutral solution, which also contained sodium salts of humic acid, via electrolytic oxidation of dissolved hydroquinone. The two electrodes were located immediately upstream and downstream of a calcite crystal so that the proton injection served to dissolve the calcite in the (inhibiting) presence of humic salts unequilibrated with the solution pH. The amount of H+ which survived passage to the downstream "detector" electrode was used to quantify the rate of dissolution and hence the inhibitory effects of the humic acid. 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In equilibrated acid solutions (pH < 4) there is no inhibition by humic material and dissolution proceeds at a rate simply determined by the solution pH. Contrastingly the sodium salts of humic acids were found to have a significant inhibitory effect on the acid catalyzed dissolution. This was quantified using a novel channel flow cell experiment which employed two electrodes, the upstream of which was used to inject protons into a neutral solution, which also contained sodium salts of humic acid, via electrolytic oxidation of dissolved hydroquinone. The two electrodes were located immediately upstream and downstream of a calcite crystal so that the proton injection served to dissolve the calcite in the (inhibiting) presence of humic salts unequilibrated with the solution pH. The amount of H+ which survived passage to the downstream "detector" electrode was used to quantify the rate of dissolution and hence the inhibitory effects of the humic acid. The latter were found to operate in a manner not inconsistent with Langmuirian adsorption.</description><subject>540350 - Environment, Aquatic- Site Resource & Use Studies- (1990-)</subject><subject>ACID RAIN</subject><subject>ALKALI METAL COMPOUNDS</subject><subject>ATMOSPHERIC PRECIPITATIONS</subject><subject>BENCH-SCALE EXPERIMENTS</subject><subject>CALCITE</subject><subject>CARBONATE MINERALS</subject><subject>CARBOXYLIC ACID SALTS</subject><subject>CATALYTIC EFFECTS</subject><subject>Chemistry</subject><subject>DISSOLUTION</subject><subject>ENVIRONMENTAL SCIENCES</subject><subject>Exact sciences and technology</subject><subject>HUMIC ACIDS</subject><subject>Inorganic chemistry and origins of life</subject><subject>Kinetics and mechanism of reactions</subject><subject>LAKES</subject><subject>LIMING</subject><subject>MINERALS</subject><subject>MITIGATION</subject><subject>ORGANIC ACIDS</subject><subject>ORGANIC COMPOUNDS</subject><subject>PH VALUE</subject><subject>RAIN</subject><subject>SODIUM COMPOUNDS</subject><subject>SURFACE WATERS</subject><subject>WATER RECLAMATION</subject><issn>0021-9797</issn><issn>1095-7103</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNp1kD1PwzAQhi0EEqWwMluINcF2nDhmq8pXUSUGymy5l7PqKk1KnCDx74kVGJlued737h5CrjlLOWPF3R58SLnWWcqFKk7IjDOdJ4qz7JTMGBM80Uqrc3IRwp4xzvNcz8jrZof0wYfQ1kPv24a2ji5tDb5H6hu6-BywHQJdgK_uaWRXjasHbAAj-TIcPND3I4LHcEnOnK0DXv3OOfl4etwsX5L12_NquVgnkEnRJwItKldk2XZrOctzYJWQildSCQWusKrURSWFYMBLpzhYqByyLViUTmnQ2ZzcTL1t6L0J8VTYQds0CL0Ze6Xk-QilEwRdG0KHzhw7f7Ddt-HMRF0m6jJRl4m6xsDtFDjaALZ2nW0i8JeSTJW5jlg5YTh--OWxiwdEHZXv4v6q9f9t-AEtnH03</recordid><startdate>19930701</startdate><enddate>19930701</enddate><creator>Compton, Richard G.</creator><creator>Sanders, Giles H.W.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19930701</creationdate><title>The Dissolution of Calcite in Aqueous Acid: The Influence of Humic Species</title><author>Compton, Richard G. ; Sanders, Giles H.W.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c342t-2eae7f633bba1055c0d2471d4727cf6a7896d4220c18f71cacdfe0bcae4f79c93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>540350 - Environment, Aquatic- Site Resource & Use Studies- (1990-)</topic><topic>ACID RAIN</topic><topic>ALKALI METAL COMPOUNDS</topic><topic>ATMOSPHERIC PRECIPITATIONS</topic><topic>BENCH-SCALE EXPERIMENTS</topic><topic>CALCITE</topic><topic>CARBONATE MINERALS</topic><topic>CARBOXYLIC ACID SALTS</topic><topic>CATALYTIC EFFECTS</topic><topic>Chemistry</topic><topic>DISSOLUTION</topic><topic>ENVIRONMENTAL SCIENCES</topic><topic>Exact sciences and technology</topic><topic>HUMIC ACIDS</topic><topic>Inorganic chemistry and origins of life</topic><topic>Kinetics and mechanism of reactions</topic><topic>LAKES</topic><topic>LIMING</topic><topic>MINERALS</topic><topic>MITIGATION</topic><topic>ORGANIC ACIDS</topic><topic>ORGANIC COMPOUNDS</topic><topic>PH VALUE</topic><topic>RAIN</topic><topic>SODIUM COMPOUNDS</topic><topic>SURFACE WATERS</topic><topic>WATER RECLAMATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Compton, Richard G.</creatorcontrib><creatorcontrib>Sanders, Giles H.W.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of colloid and interface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Compton, Richard G.</au><au>Sanders, Giles H.W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Dissolution of Calcite in Aqueous Acid: The Influence of Humic Species</atitle><jtitle>Journal of colloid and interface science</jtitle><date>1993-07-01</date><risdate>1993</risdate><volume>158</volume><issue>2</issue><spage>439</spage><epage>445</epage><pages>439-445</pages><issn>0021-9797</issn><eissn>1095-7103</eissn><coden>JCISA5</coden><abstract>The kinetics of proton-induced calcite dissolution in aqueous solution in the presence of humic acids and their sodium salts are reported. In equilibrated acid solutions (pH < 4) there is no inhibition by humic material and dissolution proceeds at a rate simply determined by the solution pH. Contrastingly the sodium salts of humic acids were found to have a significant inhibitory effect on the acid catalyzed dissolution. This was quantified using a novel channel flow cell experiment which employed two electrodes, the upstream of which was used to inject protons into a neutral solution, which also contained sodium salts of humic acid, via electrolytic oxidation of dissolved hydroquinone. The two electrodes were located immediately upstream and downstream of a calcite crystal so that the proton injection served to dissolve the calcite in the (inhibiting) presence of humic salts unequilibrated with the solution pH. The amount of H+ which survived passage to the downstream "detector" electrode was used to quantify the rate of dissolution and hence the inhibitory effects of the humic acid. The latter were found to operate in a manner not inconsistent with Langmuirian adsorption.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><doi>10.1006/jcis.1993.1276</doi><tpages>7</tpages></addata></record> |
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| identifier | ISSN: 0021-9797 |
| ispartof | Journal of colloid and interface science, 1993-07, Vol.158 (2), p.439-445 |
| issn | 0021-9797 1095-7103 |
| language | eng |
| recordid | cdi_osti_scitechconnect_6334415 |
| source | Backfile Package - Materials Science [YMS]; Backfile Package - Chemical Engineering (Legacy) [YCC] |
| subjects | 540350 - Environment, Aquatic- Site Resource & Use Studies- (1990-) ACID RAIN ALKALI METAL COMPOUNDS ATMOSPHERIC PRECIPITATIONS BENCH-SCALE EXPERIMENTS CALCITE CARBONATE MINERALS CARBOXYLIC ACID SALTS CATALYTIC EFFECTS Chemistry DISSOLUTION ENVIRONMENTAL SCIENCES Exact sciences and technology HUMIC ACIDS Inorganic chemistry and origins of life Kinetics and mechanism of reactions LAKES LIMING MINERALS MITIGATION ORGANIC ACIDS ORGANIC COMPOUNDS PH VALUE RAIN SODIUM COMPOUNDS SURFACE WATERS WATER RECLAMATION |
| title | The Dissolution of Calcite in Aqueous Acid: The Influence of Humic Species |
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