腐植土生成に関する実験的研究 (腐植土年代学に関する総合的研究(特集))

概要

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As a model experiment aiming at the role of allophane and aluminium for elucidating the formative mechanisms of humic soil, the browning reactions of pyrogallol, catechol and hydroquinone were examined spectrophotometrically in the presence of three soils (C-horizons); Tenmondai (volcanic ash soil, allophane), Zenjino (strongly acid red-yellow soil, monmorillonite) and Higashiyama (acid red-yellow soil, kaolin minerals).The formation of complexes between aluminium and purpurogallin or an unknown compound derived from catechol, and between iron and catechol was distinctly recognized in the presence of Tenmondai and Zenjino.It was deduced that the formation of these complexes and browning substances influenced by soil materials and their adsorption on soils increased in the order of Tenmondai, Zenjino and Higashiyama.Hydroquinone may be the best model compound among the three polyphenols.
日本第四紀学会の論文