The influence of total organic carbon (TOC) on the relationship between acid neutralizing capacity (ANC) and fish status in Norwegian lakes

2004 ◽  
Vol 326 (1-3) ◽  
pp. 63-69 ◽  
Author(s):  
Espen Lydersen ◽  
Thorjørn Larssen ◽  
Eirik Fjeld
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Acid Neutralizing Capacity ◽  
Neutralizing Capacity ◽  
The Relationship

scholarly journals Acid-neutralizing capacity of Finnish mineral soils

1985 ◽  
Vol 57 (4) ◽  
pp. 279-283
Author(s):  
Helinä Hartikainen
Keyword(s):  
Clay Soils ◽  
Acid Neutralizing Capacity ◽  
Significant Variable ◽  
Exchange Reactions ◽  
Organic C ◽  
Neutralizing Capacity ◽  
Heavy Clay ◽  
Mineral Soils ◽  
The Relationship ◽  
Soil Groups

The acid-neutralizing capacity (ANC) was determined graphically from curves obtained in HCI titration (at a constant ionic strength I = 0.1) and was expressed as a quantity of acid (meq kg-1) needed to reduce the soil pH to 3.8. The relationship between ANC3.8 g and soil characteristics was studied statistically. In 84 soil samples, ANC3.8 ranged from 12 to 184 meq kg-1. The average ANC3.8 was highest in the heavy clay soils and lowest in the non-clay soils, but the differences between the various textural soil groups were not significant. In all soil groups the initial pHCaCl2 was relatively the most important factor explaining the variation in ANC3.8. Organic C was also a significant variable; this was considered to indicate the importance of cation exchange reactions of organic matter in acid-buffering. With the exception of heavy clay soils, oxalate-soluble Al significantly explained the variation in ANC3.8, suggesting that dissolution of Al hydroxides acted as a sink for H+ ions and contributed to the neutralizing capacity at the reference pH of 3.8.

scholarly journals The relationship between microstructure and photocatalytic behavior in lanthanum-modified 2D TiO2 nanosheets upon annealing of a freeze-cast precursor

RSC Advances ◽  
2019 ◽  
Vol 9 (40) ◽  
pp. 22988-23003 ◽  
Author(s):  
Snejana Bakardjieva ◽  
Jakub Mares ◽  
Radek Fajgar ◽  
Victor Y. Zenou ◽  
Michaela Maleckova ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Freeze Casting ◽  
Casting Method ◽  
Tio2 Nanosheets ◽  
The Relationship

Titanium dioxide modified with 3 wt% La was prepared via a green freeze-casting method, and its photocatalytic activity was tested in terms of its ability to degrade 4-chlorophenol (4-CP) and remove total organic carbon (TOC).

scholarly journals The complementary power of pH and lake water organic carbon reconstructions for discerning the influences on surface waters across decadal to millennial time scales

2011 ◽  
Vol 8 (2) ◽  
pp. 2439-2466 ◽  
Author(s):  
P. Rosén ◽  
R. Bindler ◽  
T. Korsman ◽  
T. Mighall ◽  
K. Bishop
Keyword(s):  
Organic Carbon ◽  
Lake Water ◽  
Near Infrared ◽  
Agricultural Land ◽  
Human Impacts ◽  
Anthropogenic Impacts ◽  
Reference Conditions ◽  
Acid Neutralizing Capacity ◽  
Element Geochemistry ◽  
Neutralizing Capacity

Abstract. Lake Lysevatten has experienced both acidification and recent changes in the amount of lake water organic carbon (TOC) over which is causing concern across Europe and North America. A range of paleolimnological tools – diatom inferred pH, inferred lake water TOC from visible-near-infrared spectroscopy (VNIRS), multi-element geochemistry and pollen analysis, combined with geochemical modeling were used to reconstruct the lake's chemistry and surroundings back to the most recent deglaciation 12 500 years ago. The results reveal that the recent anthropogenic impacts are similar in magnitude to the long-term variation driven by natural catchment changes and early agricultural land use occurring over centuries and millennia. The combined reconstruction of both lake water TOC and lithogenic element delivery can explain the major changes in lake-water pH and modeled acid neutralizing capacity during the past 12 500 years. The results raise important questions regarding what precisely comprises ''reference'' conditions (i.e., free from human impacts) as encapsulated in the European Water Framework Directive.

scholarly journals The complementary power of pH and lake-water organic carbon reconstructions for discerning the influences on surface waters across decadal to millennial time scales

2011 ◽  
Vol 8 (9) ◽  
pp. 2717-2727 ◽  
Author(s):  
P. Rosén ◽  
R. Bindler ◽  
T. Korsman ◽  
T. Mighall ◽  
K. Bishop
Keyword(s):  
Organic Carbon ◽  
Lake Water ◽  
Near Infrared ◽  
Agricultural Land ◽  
Human Impacts ◽  
Anthropogenic Impacts ◽  
Reference Conditions ◽  
Acid Neutralizing Capacity ◽  
Element Geochemistry ◽  
Neutralizing Capacity

Abstract. Lysevatten, a lake in southwest Sweden, has experienced both acidification and recent changes in the amount of lake-water organic carbon (TOC), both causing concern across Europe and North America. A range of paleolimnological tools – diatom-inferred pH, inferred lake-water TOC from visible-near-infrared spectroscopy (VNIRS), multi-element geochemistry and pollen analysis, combined with geochemical modeling were used to reconstruct the lake's chemistry and surroundings back to the most recent deglaciation 12 500 years ago. The results reveal that the recent anthropogenic impacts are similar in magnitude to the long-term variation driven by natural catchment changes and early agricultural land use occurring over centuries and millennia. The combined reconstruction of both lake-water TOC and lithogenic element delivery can explain the major changes in lake-water pH and modeled acid neutralizing capacity during the past 12 500 years. The results raise important questions regarding what precisely comprises "reference" conditions (i.e., free from human impacts) as defined in the European Water Framework Directive.

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