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Destruction of Organic Matter by Hydrogen Peroxide in the Presence of Pyrophosphate and Its Effect on Soil Specific Surface Area
Author(s) -
Sequi Paolo,
Aringhieri Roberto
Publication year - 1977
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/sssaj1977.03615995004100020033x
Subject(s) - chemistry , organic matter , hydrogen peroxide , oxidizing agent , environmental chemistry , pyrophosphate , inorganic chemistry , pyridinium , nuclear chemistry , organic chemistry , enzyme
The effectiveness of hydrogen peroxide in oxidizing soil organic matter was markedly increased by the presence of 0.1 M sodium pyrophosphate at pH 7, with residual C after treatment being reduced up to 20 times lower compared to conventional soil peroxidation. “Electropositive” (Orange II) and external (N 2 ) surface areas increased, whereas “electronegative” (cetyl pyridinium bromide) surface area values generally decreased after H 2 O 2 treatment, supporting the assumption that metals released from organic matter may precipitate as hydroxide coatings that hinder further oxidation. Some soil sorption sites appear to be occluded by organic matter, so that changes in soil properties after peroxidation cannot be solely attributed to organic matter.