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）开发了土壤中硒（SE）定量形成的方法，并将土壤中的SE分为五个部分：富含富氏酸，无机SE（IV），无机SE（VI）和有机SE的有机SE包含的有机SE，有机SE，有机SE，具有高分子量的有机SE，具有低分子量的有机SE。使用这种方法检查了几种土壤，发现土壤中超过50％的SE的50％是有机SE的形式。通过在洪水泛滥的状态下孵育约6周，没有发现土壤SE形式的时间变化。在加热土壤上，土壤中的有机SE降低，无机SE（IV）随着加热温度的升高而形成。在300 c.3以上的温度下逐渐形成的无机SE（IV）逐渐升华。该方法证实了在水口状态下孵育约3周的土壤中的元素SE的形成。估计形成的元素是从土壤中包含的无机SE（IV）转化的。4）总计在Ishigaki，Kume，Kume和Oukinawa县宫科岛上收集的土壤中的可溶性SE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。

YAMADA H.: "Behavior of trimethylselenonium ion in soils(仮題)" Soil Sci.Plant Nutri.

YAMADA H.：“土壤中三甲基硒离子的行为（暂定标题）”土壤科学.植物营养。