Acidification of till in Northern Finland: experimental study
The acid neutralizing capacity of till and some effects promoted by increasing acidity, were studied in a number of tills in northern Finland. pH profiles were measured in the field and acid neutralizing capacity (ANC mmol/100 g sample) in the laboratory as a function of the varying acidity in solut...
Published in: | Bulletin of the Geological Society of Finland |
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Geological Society of Finland
1996
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ftdoajarticles:oai:doaj.org/article:459fedb710b54feb93ed99653bc933ff 2023-05-15T17:42:14+02:00 Acidification of till in Northern Finland: experimental study R. Aario V. Peuraniemi 1996-06-01T00:00:00Z https://doi.org/10.17741/bgsf/68.1.005 https://doaj.org/article/459fedb710b54feb93ed99653bc933ff EN eng Geological Society of Finland http://www.geologinenseura.fi/bulletin/Volume68/sgs_bt_068_1_pages_050_060.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/68.1.005 0367-5211 1799-4632 https://doaj.org/article/459fedb710b54feb93ed99653bc933ff Bulletin of the Geological Society of Finland, Vol 68, Iss 1, Pp 50-60 (1996) environmental geology till acidification pH buffers neutralization chemical elements experimental studies Northern Finland Geology QE1-996.5 article 1996 ftdoajarticles https://doi.org/10.17741/bgsf/68.1.005 2022-12-31T01:24:29Z The acid neutralizing capacity of till and some effects promoted by increasing acidity, were studied in a number of tills in northern Finland. pH profiles were measured in the field and acid neutralizing capacity (ANC mmol/100 g sample) in the laboratory as a function of the varying acidity in solution. The concentrations of Al, Ca, Mg, Fe, K, Mn, Zn, Cu and Sr in solutions were also analyzed. The results are presented in the form of graphs of ANC versus final pH of the solution and element concentration versus final pH. The total concentrations of the major elements were analyzed by XRF and those of trace elements by AAS. The pH measured in the test pits was lowest just below the ground surface, and rose rapidly to a value of 6 at a depth of about 1 m and then it remained more or less constant with depth. The laboratory analyses clearly suggest that the acid neutralizing capacity of till correlates well with sample depth. The ANC values, which represent the fast-working part of the capacity, are higher in the surficial parts owing to the easily soluble aluminium and iron hydroxides which have their origin in the weathering processes. The experiments resemble acid rain conditions, where the higher pH-level buffers are unable to neutralize the increase in acidity immediately, so that lower pH-level buffering processes such as Al and Fe hydroxide buffers come into play. The situation can be hazardous for both forests and surface water. Article in Journal/Newspaper Northern Finland Directory of Open Access Journals: DOAJ Articles Bulletin of the Geological Society of Finland 68 1 50 60 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
environmental geology till acidification pH buffers neutralization chemical elements experimental studies Northern Finland Geology QE1-996.5 |
spellingShingle |
environmental geology till acidification pH buffers neutralization chemical elements experimental studies Northern Finland Geology QE1-996.5 R. Aario V. Peuraniemi Acidification of till in Northern Finland: experimental study |
topic_facet |
environmental geology till acidification pH buffers neutralization chemical elements experimental studies Northern Finland Geology QE1-996.5 |
description |
The acid neutralizing capacity of till and some effects promoted by increasing acidity, were studied in a number of tills in northern Finland. pH profiles were measured in the field and acid neutralizing capacity (ANC mmol/100 g sample) in the laboratory as a function of the varying acidity in solution. The concentrations of Al, Ca, Mg, Fe, K, Mn, Zn, Cu and Sr in solutions were also analyzed. The results are presented in the form of graphs of ANC versus final pH of the solution and element concentration versus final pH. The total concentrations of the major elements were analyzed by XRF and those of trace elements by AAS. The pH measured in the test pits was lowest just below the ground surface, and rose rapidly to a value of 6 at a depth of about 1 m and then it remained more or less constant with depth. The laboratory analyses clearly suggest that the acid neutralizing capacity of till correlates well with sample depth. The ANC values, which represent the fast-working part of the capacity, are higher in the surficial parts owing to the easily soluble aluminium and iron hydroxides which have their origin in the weathering processes. The experiments resemble acid rain conditions, where the higher pH-level buffers are unable to neutralize the increase in acidity immediately, so that lower pH-level buffering processes such as Al and Fe hydroxide buffers come into play. The situation can be hazardous for both forests and surface water. |
format |
Article in Journal/Newspaper |
author |
R. Aario V. Peuraniemi |
author_facet |
R. Aario V. Peuraniemi |
author_sort |
R. Aario |
title |
Acidification of till in Northern Finland: experimental study |
title_short |
Acidification of till in Northern Finland: experimental study |
title_full |
Acidification of till in Northern Finland: experimental study |
title_fullStr |
Acidification of till in Northern Finland: experimental study |
title_full_unstemmed |
Acidification of till in Northern Finland: experimental study |
title_sort |
acidification of till in northern finland: experimental study |
publisher |
Geological Society of Finland |
publishDate |
1996 |
url |
https://doi.org/10.17741/bgsf/68.1.005 https://doaj.org/article/459fedb710b54feb93ed99653bc933ff |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Bulletin of the Geological Society of Finland, Vol 68, Iss 1, Pp 50-60 (1996) |
op_relation |
http://www.geologinenseura.fi/bulletin/Volume68/sgs_bt_068_1_pages_050_060.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/68.1.005 0367-5211 1799-4632 https://doaj.org/article/459fedb710b54feb93ed99653bc933ff |
op_doi |
https://doi.org/10.17741/bgsf/68.1.005 |
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Bulletin of the Geological Society of Finland |
container_volume |
68 |
container_issue |
1 |
container_start_page |
50 |
op_container_end_page |
60 |
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1766144077901856768 |