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Exchange of alkaline earth cations in soil organic matter



Exchange of alkaline earth cations in soil organic matter



Soil Science 146(1): 6-14



We conducted batch equilibration ion exchange experiments to determine selectivity of peat for various alkaline earth ions with calcium as the resident cation. Two levels of Ca-neutralized peat (100 and 33%) were prepared from acid-washed samples (CEC=2.72 mol(+) kg-1) by equilibration with equivalent amounts of CO2-free satureated Ca(OH)2. The pH and concentrations of Ca2+ and the exchanging ion were determined at the end of each equilibration period. Both the 100 and 33% Ca-neutralized peat showed the preferential sequence Mg

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Accession: 001831075

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DOI: 10.1097/00010694-198807000-00002



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