Influence of Air-Drying on Adsorption and Oxidation of Phenolic Acids in Andosols and Non-Andosols
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概要
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Phenolie acids in soils play a variety of important roles in the environment. Several studies have been conducted on the reaction of phenolic acids in soils. Air-dried soils, however, were used in these reports, and reactions of phenolic acids in field-moist soils may differ. In this study, the influence of air-drying of soils on the adsorption and abiotic oxidation of 3 phenolic acids showing different levels of oxidizability (in the order of ferulie acid >vanillic aeid>> phydroxybenzoic acid) was investigated, using 16 samples of field-moist and air-dried soils. Residue levels in the aqueous phases of ferulie acid (RFA) and vanillic acid (RVA) significantly increased when phenolic acids were added to air-dried non-Andosols, while the changes were negligible in Andosols. No significant difference due to air-drying was found in the residues of p-hydroxybenzoic acid (RHA). Abiotie soil oxidative activity, determined by the amounts of Cr(VI) derived from Cr(III), significantly decreased by air-drying in both non-Andosols and Andosols. It was also observed that the relationship between the abiotic oxidative activity and RVA level was linear in non-Andosols, suggesting the validity of the Cr(III) oxidation method to evaluate the abiotic soil oxidative activity for phenolic acids. Consequently, the increases of RFA and RVA levels in air-dried non-Andosols can be attributed to the decrease in the abiotic oxidative activity, while the adsorptive capacity for phenolic acids was not significantly influenced. It is considered that adsorption is prevalent in Andosols with relatively little influence of air-drying, compared with non-Andosols.
- 社団法人日本土壌肥料学会の論文
著者
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MAKINO Tomoyuki
National Institute for Agro-Environmental Sciences
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SAKURAI Yasuhiro
National Institute for Agro-Environmental Sciences
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TAKAHASHI Yoshiaki
National Institute of Materials and Chemical Research (NIMC)
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Sakurai Y
National Institute For Agro-environmental Sciences
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Takahashi Y
Faculty Of Agriculture Saga University
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Kamimura Yoriko
National Institute of Agro-Environmental Sciences
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Kamimura Y
National Institute Of Agro-environmental Sciences
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Takahashi Yoshiaki
National Institute Of Agricultural Sciences
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Makino Tomoyuki
National Inst. Agro‐environmental Sci. Tsukuba Jpn
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Sakurai Yasuyuki
National Institute of Agro-Environmental Sciences
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