acidity and acid–base buffering of organic-rich surface waters
The role of organic acids in buffering pH in surface waters has been studied using a small brownwater stream (26mgL1 TOC) draining a forested catchment in Northern Sweden. Under the conditions of elevated pressure of CO2 stream field pH was changed between 3.5 and 6.1 during the acidification and al...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.587.4336 2023-05-15T17:44:39+02:00 acidity and acid–base buffering of organic-rich surface waters Stephan K Ohlera Lars L Ovgrenc Stephen Loftsd The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.4336 http://mounier.univ-tln.fr/rcmo/php_biblio/PDF/5028.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.4336 http://mounier.univ-tln.fr/rcmo/php_biblio/PDF/5028.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://mounier.univ-tln.fr/rcmo/php_biblio/PDF/5028.pdf Organic acidity Air-equilibrated pH Alkalinity WHAM V Surface waters text 2002 ftciteseerx 2016-01-08T13:19:19Z The role of organic acids in buffering pH in surface waters has been studied using a small brownwater stream (26mgL1 TOC) draining a forested catchment in Northern Sweden. Under the conditions of elevated pressure of CO2 stream field pH was changed between 3.5 and 6.1 during the acidification and alkalinization experiment. Acid–base characteristics of the natural organic matter were also determined using a high precision potentiometric method for a concentrated sample from the same stream. We compared the predictions from the Windermere Humic Aqueous Model (WHAM Model V), a model derived from the potentiometric titration (diprotic/monoprotic acid model) and a previously derived triprotic acid model which only uses alkalinity and TOC as input variables. The predicted buffering characteristics of all three models are very similar in the pH range 4.5–7 which suggests that during routine analysis alkalinity and TOC are sufficient to give a good estimate of organic acid anion charge contribution in a large range of surface waters. A slightly adjusted version of WHAM V successfully describes the organic charge contribution in a large Text Northern Sweden Unknown |
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ftciteseerx |
language |
English |
topic |
Organic acidity Air-equilibrated pH Alkalinity WHAM V Surface waters |
spellingShingle |
Organic acidity Air-equilibrated pH Alkalinity WHAM V Surface waters Stephan K Ohlera Lars L Ovgrenc Stephen Loftsd acidity and acid–base buffering of organic-rich surface waters |
topic_facet |
Organic acidity Air-equilibrated pH Alkalinity WHAM V Surface waters |
description |
The role of organic acids in buffering pH in surface waters has been studied using a small brownwater stream (26mgL1 TOC) draining a forested catchment in Northern Sweden. Under the conditions of elevated pressure of CO2 stream field pH was changed between 3.5 and 6.1 during the acidification and alkalinization experiment. Acid–base characteristics of the natural organic matter were also determined using a high precision potentiometric method for a concentrated sample from the same stream. We compared the predictions from the Windermere Humic Aqueous Model (WHAM Model V), a model derived from the potentiometric titration (diprotic/monoprotic acid model) and a previously derived triprotic acid model which only uses alkalinity and TOC as input variables. The predicted buffering characteristics of all three models are very similar in the pH range 4.5–7 which suggests that during routine analysis alkalinity and TOC are sufficient to give a good estimate of organic acid anion charge contribution in a large range of surface waters. A slightly adjusted version of WHAM V successfully describes the organic charge contribution in a large |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Stephan K Ohlera Lars L Ovgrenc Stephen Loftsd |
author_facet |
Stephan K Ohlera Lars L Ovgrenc Stephen Loftsd |
author_sort |
Stephan K Ohlera |
title |
acidity and acid–base buffering of organic-rich surface waters |
title_short |
acidity and acid–base buffering of organic-rich surface waters |
title_full |
acidity and acid–base buffering of organic-rich surface waters |
title_fullStr |
acidity and acid–base buffering of organic-rich surface waters |
title_full_unstemmed |
acidity and acid–base buffering of organic-rich surface waters |
title_sort |
acidity and acid–base buffering of organic-rich surface waters |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.4336 http://mounier.univ-tln.fr/rcmo/php_biblio/PDF/5028.pdf |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
http://mounier.univ-tln.fr/rcmo/php_biblio/PDF/5028.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.4336 http://mounier.univ-tln.fr/rcmo/php_biblio/PDF/5028.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766146921046474752 |