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A field experiment to test whether organic acids buffer acid deposition
THE role of organic acids in surface-water acidification is a matter of recent controversy 1–8 . It has been suggested 1,4–6 that lakes and streams in the northeastern United States and southern Scandinavia that have high mineral acidity resulting from acid deposition had, before acid deposition, hi...
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| Published in: | Nature (London) 1990-06, Vol.345 (6278), p.798-800 |
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| creator | Hedin, Lars O Likens, Gene E Postek, Kimberley M Driscoll, Charles T |
| description | THE role of organic acids in surface-water acidification is a matter of recent controversy
1–8
. It has been suggested
1,4–6
that lakes and streams in the northeastern United States and southern Scandinavia that have high mineral acidity resulting from acid deposition had, before acid deposition, high concentrations of dissolved organic carbon (DOC) and were acidified by natural organic acids. The suggestion is that deposition of strong mineral acids has been buffered by concurrent losses in organic acids and DOC
4–6
, resulting in little or no overall change in pH. Despite considerable debate
6–8
and comparative analyses of lake chemistry
2,7
, this hypothesis has never been tested experimentally in the field. Here we present results from an experimental acidification of a brown-water stream that tests two of the major elements of the hypothesis. We find that DOC concentrations are not reduced by acidification, and that the organic acid–base system has only a very limited capacity to buffer inputs of strong mineral acids. In addition, mineral acids mobilize toxic forms of aluminium. |
| doi_str_mv | 10.1038/345798a0 |
| format | article |
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1–8
. It has been suggested
1,4–6
that lakes and streams in the northeastern United States and southern Scandinavia that have high mineral acidity resulting from acid deposition had, before acid deposition, high concentrations of dissolved organic carbon (DOC) and were acidified by natural organic acids. The suggestion is that deposition of strong mineral acids has been buffered by concurrent losses in organic acids and DOC
4–6
, resulting in little or no overall change in pH. Despite considerable debate
6–8
and comparative analyses of lake chemistry
2,7
, this hypothesis has never been tested experimentally in the field. Here we present results from an experimental acidification of a brown-water stream that tests two of the major elements of the hypothesis. We find that DOC concentrations are not reduced by acidification, and that the organic acid–base system has only a very limited capacity to buffer inputs of strong mineral acids. In addition, mineral acids mobilize toxic forms of aluminium.</description><identifier>ISSN: 0028-0836</identifier><identifier>EISSN: 1476-4687</identifier><identifier>DOI: 10.1038/345798a0</identifier><identifier>CODEN: NATUAS</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>Acid deposition ; Acidification ; Acidity ; Acids ; Aluminum ; Buffers ; Chemistry ; Deposition ; Dissolved organic carbon ; Earth sciences ; Earth, ocean, space ; Ecology ; Ecosystems ; Environment ; Exact sciences and technology ; Geochemistry ; Humanities and Social Sciences ; Hypotheses ; Inorganic acids ; Lakes ; letter ; multidisciplinary ; Organic acids ; Organic carbon ; Organic chemistry ; Pollutant deposition ; Science ; Science (multidisciplinary) ; Streams ; Surface water</subject><ispartof>Nature (London), 1990-06, Vol.345 (6278), p.798-800</ispartof><rights>Springer Nature Limited 1990</rights><rights>1993 INIST-CNRS</rights><rights>Copyright Macmillan Journals Ltd. Jun 28, 1990</rights><rights>Copyright Nature Publishing Group Jun 28, 1990</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a483t-b4d3780503e51a6c99c22e417572e8bef16c29dea2356396fbe7cbbee983301a3</citedby><cites>FETCH-LOGICAL-a483t-b4d3780503e51a6c99c22e417572e8bef16c29dea2356396fbe7cbbee983301a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,2727,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=4623331$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Hedin, Lars O</creatorcontrib><creatorcontrib>Likens, Gene E</creatorcontrib><creatorcontrib>Postek, Kimberley M</creatorcontrib><creatorcontrib>Driscoll, Charles T</creatorcontrib><title>A field experiment to test whether organic acids buffer acid deposition</title><title>Nature (London)</title><addtitle>Nature</addtitle><description>THE role of organic acids in surface-water acidification is a matter of recent controversy
1–8
. It has been suggested
1,4–6
that lakes and streams in the northeastern United States and southern Scandinavia that have high mineral acidity resulting from acid deposition had, before acid deposition, high concentrations of dissolved organic carbon (DOC) and were acidified by natural organic acids. The suggestion is that deposition of strong mineral acids has been buffered by concurrent losses in organic acids and DOC
4–6
, resulting in little or no overall change in pH. Despite considerable debate
6–8
and comparative analyses of lake chemistry
2,7
, this hypothesis has never been tested experimentally in the field. Here we present results from an experimental acidification of a brown-water stream that tests two of the major elements of the hypothesis. We find that DOC concentrations are not reduced by acidification, and that the organic acid–base system has only a very limited capacity to buffer inputs of strong mineral acids. In addition, mineral acids mobilize toxic forms of aluminium.</description><subject>Acid deposition</subject><subject>Acidification</subject><subject>Acidity</subject><subject>Acids</subject><subject>Aluminum</subject><subject>Buffers</subject><subject>Chemistry</subject><subject>Deposition</subject><subject>Dissolved organic carbon</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Ecology</subject><subject>Ecosystems</subject><subject>Environment</subject><subject>Exact sciences and technology</subject><subject>Geochemistry</subject><subject>Humanities and Social Sciences</subject><subject>Hypotheses</subject><subject>Inorganic acids</subject><subject>Lakes</subject><subject>letter</subject><subject>multidisciplinary</subject><subject>Organic acids</subject><subject>Organic carbon</subject><subject>Organic chemistry</subject><subject>Pollutant deposition</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><subject>Streams</subject><subject>Surface water</subject><issn>0028-0836</issn><issn>1476-4687</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><recordid>eNqF0dtKHTEUBuBQWnBXCz6BBFusXky7kpXjpUirBcGb9nrIZNboyDizm8xQ-_ZGtt0F6eEqJPn4c_gZ2xfwQQC6j6i09S7AC7YSyppKGWdfshWAdBU4NDvsdc63AKCFVSt2fsq7noaW0_2aUn9H48znic-UZ_7jhuYbSnxK12HsIw-xbzNvlq4ri48T3tJ6yv3cT-Mee9WFIdObp3GXffv86evZRXV5df7l7PSyCsrhXDWqRetAA5IWwUTvo5SkhNVWkmuoEyZK31KQqA160zVkY9MQeYcIIuAue7_JXafp-1JuWd_1OdIwhJGmJddWofBKOl_k0T-l1MaA9_a_UCiptdeuwLfP4O20pLE8t5YSwTgoBRR1-FcFSqEUIAs63qCYppwTdfW6fH5IP2sB9WOP9a8eC333lBdyDEOXwhj7vPXKSEQUhZ1sWC474zWl38f-IfJgY8cwL4m2WVvwAP8WsKE</recordid><startdate>19900628</startdate><enddate>19900628</enddate><creator>Hedin, Lars O</creator><creator>Likens, Gene E</creator><creator>Postek, Kimberley M</creator><creator>Driscoll, Charles T</creator><general>Nature Publishing Group 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whether organic acids buffer acid deposition</atitle><jtitle>Nature (London)</jtitle><stitle>Nature</stitle><date>1990-06-28</date><risdate>1990</risdate><volume>345</volume><issue>6278</issue><spage>798</spage><epage>800</epage><pages>798-800</pages><issn>0028-0836</issn><eissn>1476-4687</eissn><coden>NATUAS</coden><abstract>THE role of organic acids in surface-water acidification is a matter of recent controversy
1–8
. It has been suggested
1,4–6
that lakes and streams in the northeastern United States and southern Scandinavia that have high mineral acidity resulting from acid deposition had, before acid deposition, high concentrations of dissolved organic carbon (DOC) and were acidified by natural organic acids. The suggestion is that deposition of strong mineral acids has been buffered by concurrent losses in organic acids and DOC
4–6
, resulting in little or no overall change in pH. Despite considerable debate
6–8
and comparative analyses of lake chemistry
2,7
, this hypothesis has never been tested experimentally in the field. Here we present results from an experimental acidification of a brown-water stream that tests two of the major elements of the hypothesis. We find that DOC concentrations are not reduced by acidification, and that the organic acid–base system has only a very limited capacity to buffer inputs of strong mineral acids. In addition, mineral acids mobilize toxic forms of aluminium.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/345798a0</doi><tpages>3</tpages></addata></record> |
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| ispartof | Nature (London), 1990-06, Vol.345 (6278), p.798-800 |
| issn | 0028-0836 1476-4687 |
| language | eng |
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| source | Nature Journals |
| subjects | Acid deposition Acidification Acidity Acids Aluminum Buffers Chemistry Deposition Dissolved organic carbon Earth sciences Earth, ocean, space Ecology Ecosystems Environment Exact sciences and technology Geochemistry Humanities and Social Sciences Hypotheses Inorganic acids Lakes letter multidisciplinary Organic acids Organic carbon Organic chemistry Pollutant deposition Science Science (multidisciplinary) Streams Surface water |
| title | A field experiment to test whether organic acids buffer acid deposition |
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