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Titration Behavior of Aluminum Organic Matter
Author(s) -
Bloom P. R.
Publication year - 1979
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1979.03615995004300040042x
Subject(s) - titration , potentiometric titration , point of zero charge , chemistry , organic matter , soil water , titration curve , gran plot , peat , adsorption , analytical chemistry (journal) , inorganic chemistry , environmental chemistry , organic chemistry , geology , soil science , ion , ecology , biology
An Aluminum (Al)‐substituted peat containing one equivalent of Al 3+ per equivalent of carboxyl groups was titrated potentiometrically in a range of NaCl concentrations. The family of titration curves generated was similar to that obtained with many acid soils. Comparison of the data from the Al‐peat with soils having a similar pH (3.9) at the apparent zero point of charge showed that the contribution of Al organic matter to H + and OH ‐ adsorption during potentiometric titrations is likely very significant and that Al on organic matter likely influences the displacement of the apparent zero point of charge from the zero point of titration.