Forms and transformations of selenium in soil.

土壤中硒的形态和转化。

• 批准号: 03660071
• 负责人: YAMADA Hidekazu
• 金额: $ 1.34万
• 依托单位: Kyoto Prefectural University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03660071/
• 关键词: Selenium; Soil; Forms of soil selenium; Elemental selenium; Selenocyanate ion; Soluble selenium; Trimethylselenonium ion; 土壌セレン; ジメチルセレン

1)A method for quantitative speciation of selenium (Se) in soil was developed and Se in soil was classified into five fractions : organic Se contained in humic acid, organic Se with high molecular weight in fulvic acid, inorganic Se(IV), inorganic Se(VI), and organic Se with low molecular weight such as selenoamino acids. Several soils were examined using this method, it was found that more than 50% of the total Se in the soils was in the forms of organic Se.2)Transformations of Se contained in soil by incubation and heating were studied. No remarkable temporal changes in the forms of soil Se were found by incubating soils under flooded condition for about 6 weeks. On heating soils, organic Se in the soil decreased and inorganic Se(IV) formed with increasing the heating temperature. The inorganic Se(IV) formed gradually sublimated with heating at temperature above 300 C.3)A method was developed for the selective determination of elemental Se in soil. Formation of elemental Se in the soil incubated in waterlogged condition for about 3 weeks was confirmed by the method. The elemental Se formed was estimated to be transformed from inorganic Se(IV) contained in the soil.4)Total and soluble Se contents in the soils collected at Ishigaki, Kume, and Miyako Islands of Okinawa prefecture were determined.

1）建立了土壤中硒的定量形态分析方法，将土壤中的硒分为五种形态：腐殖酸中的有机硒、富里酸中的高分子量有机硒、无机硒（IV）、无机硒（VI）和低分子量有机硒（如硒氨基酸）。用该方法测定了几种土壤中的硒，发现有机硒占土壤总硒的50%以上。2）研究了培养和加热条件下土壤中硒的转化。淹水培养6周左右，土壤硒形态无明显的时间变化。在土壤加热条件下，随着加热温度的升高，土壤中有机硒减少，无机硒（IV）形成。在300 ℃以上加热，无机硒（IV）逐渐升华。3）建立了土壤中硒元素的选择性测定方法。在淹水条件下培养约3周的土壤中元素硒的形成被证实的方法。4）测定了冲绳县石垣岛、久米岛和宫古岛土壤中的全硒和可溶性硒含量。

项目成果

Kang Y.Yamada H. and Kyuma K.: "Speciation of selenium species in soil" Soil Science and Plant Nutrition.

Kang Y.Yamada H. 和 Kyuma K.：“土壤中硒的形态”土壤科学和植物营养。

山田秀和: "(解説)土壌中のセレンの分布と挙動" ぶんせき. (印刷待). (1994)

Hidekazu Yamada：“（评论）土壤中硒的分布和行为”Bunseki（等待印刷）。

Y.Kang,H.Yamada,K.Kyuma,and T.Hattori: "Speciation of selenium in soil" Soil Sci.Plant Nutr.39. 331-337 (1993)

Y.Kang、H.Yamada、K.Kyuma 和 T.Hattori：“土壤中硒的形态”Soil Sci.Plant Nutr.39。

Kang, Y., Yamada, H., Kyuma, K., and Hattori, T.: "Speciation of selenium in soil" Soil Sci.Plant Nutr.39. 331-337 (1993)

Kang, Y.、Yamada, H.、Kyuma, K. 和 Hattori, T.：“土壤中硒的形态”Soil Sci.Plant Nutr.39。

Y.Kang,N.Nozato,K.Kyuma,and H.Yamada: "Forms of selenium in paddy soil" Soil Sci.Plant Nutr.36. 475-482 (1990)

Y.Kang、N.Nozato、K.Kyuma 和 H.Yamada：“稻田土壤中硒的形态”Soil Sci.Plant Nutr.36。