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Production of Permanganate Ion by Sodium Hypochlorite Treatment to Remove Soil Organic Matter
Author(s) -
Anderson J. U.,
O'Connor G. A.
Publication year - 1972
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/sssaj1972.03615995003600060042x
Subject(s) - organic matter , permanganate , chemistry , sodium hypochlorite , redox , hypochlorite , potassium permanganate , ion , sodium , environmental chemistry , inorganic chemistry , organic chemistry
The pink color characteristically produced during NaOCl treatment of soil to destroy organic matter was studied. Colored extracts were analyzed for Mn content and Redox potential. A spectrophotometer scan of one extract was compared with a scan of KMnO 4 solution, and the extract color was shown to be caused by the MnO 4 ‐ ion. The time of appearance and the intensity of the color were related to the organic matter contents of the samples. The source of the Mn was probably Mn(II) released from organic matter during oxidation. The MnO 4 ‐ color appeared when the Redox potential shifted to about + 1.2 V, and was thus a reliable indicator of the approximate end of the organic matter oxidation process.