山形大学農学部研究シーズ集2019 リン酸収着がベトナムの フェラルソルの分散に及ぼす影響 Effect of phosphate sorption on dispersion in a Ferralsol of Vietnam プロジェクト教員 PHAM VIET DUNG （ファムビエットズン） 助教 研究内容 キーワード： Soil colloid, Soil physics, Sorption on Soil 専門分野： 土壌物理 連絡先Email：[email protected] 樹木枯死 生理 Introduction : Dispersion of colloidal soil is closely related to various environmental problems. Increase of soil dispersion can decrease the soil permeability and it sometimes induces erosion. In this study, the influence of P sorption on soil dispersion was investigated experimentally and evaluated by calculating repulsive potential energy based on zeta potential. Stability ratio was used to evaluate stability of colloid suspension. Introduction : Dispersion of colloidal soil is closely related to various environmental problems. Increase of soil dispersion can decrease the soil permeability and it sometimes induces erosion. In this study, the influence of P sorption on soil dispersion was investigated experimentally and evaluated by calculating repulsive potential energy based on zeta potential. Stability ratio was used to evaluate stability of colloid suspension. Conclusion : We successfully evaluated the influence of phosphate sorption on the Ferralsol dispersion by calculating repulsive potential energy based on zeta potential. Because soil dispersion sometimes induces environmental problem, it is better to avoid the dispersive condition when applying phosphate fertilizers even if the soil is initially flocculative. Zeta potential (ζ) measurement Dynamic light scattering Schematic representation of the overlap of two clay particles when a pair of plates are brought to a surface separation D 0 0.5 1 1.5 2 2.5 0.01 0.1 1 10 logW Repulsive potential energy (μJ m-2) pH =5.5 pH =4 pH =7 pH =8.5 Na system The stability ratio (W) and the repulsive potential energy (V ζ ) Soil dispersio n Soil flocculatio n
2019Soil colloid, Soil physics, Sorption on Soil 専門分野：土壌物理 連絡先 Email：[email protected] 樹木枯死 生理 Introduction: Dispersion of colloidal
Jul 12, 2020
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山形大学農学部研究シーズ集2019
リン酸収着がベトナムのフェラルソルの分散に及ぼす影響
Effect of phosphate sorption on dispersion in a Ferralsol of Vietnam
プロジェクト教員PHAM VIET DUNG （ファムビエットズン） 助教
研究内容
キーワード： Soil colloid, Soil physics, Sorption on Soil専門分野： 土壌物理連絡先Email：[email protected]
樹木枯死
生理
Introduction: Dispersion of colloidal soil is closely related to various environmentalproblems. Increase of soil dispersion can decrease the soil permeability and it sometimesinduces erosion. In this study, the influence of P sorption on soil dispersion was investigatedexperimentally and evaluated by calculating repulsive potential energy based on zetapotential. Stability ratio was used to evaluate stability of colloid suspension.
Introduction: Dispersion of colloidal soil is closely related to various environmentalproblems. Increase of soil dispersion can decrease the soil permeability and it sometimesinduces erosion. In this study, the influence of P sorption on soil dispersion was investigatedexperimentally and evaluated by calculating repulsive potential energy based on zetapotential. Stability ratio was used to evaluate stability of colloid suspension.
Conclusion: We successfullyevaluated the influence ofphosphate sorption on theFerralsol dispersion bycalculating repulsive potentialenergy based on zeta potential.Because soil dispersionsometimes inducesenvironmental problem, it isbetter to avoid the dispersivecondition when applyingphosphate fertilizers even if thesoil is initially flocculative.
Zeta potential (ζ)measurement Dynamic light scattering
Schematic representation of the overlap of two clay particles when a
pair of plates are brought to a surface separation D
0
0.5
1
1.5
2
2.5
0.01 0.1 1 10
logW
Repulsive potential energy (μJ m-2)
pH =5.5
pH =4
pH =7
pH =8.5
Na system
The stability ratio (W) and the repulsive potential energy (Vζ)
Soil dispersion
Soil flocculation
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