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Behavior and Distribution Coefficient of Some Elements in Soil under Natural Condition

自然条件下土壤中部分元素的行为及分布系数

基本信息

批准号：
08650649
负责人：
NISHIMAKI Kenzo
金额：
$ 1.47万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650649/
关键词：
Surface Soil Soil Pore Water Vertical Profile Ion Balance Distribution Ratio Cesium Cobalt Antimony 鉛直元素分布元素分析陽イオン陰イオン

项目摘要

Some elements in surface soil and soil pore water which was collected by an ultracentrifuge, under natural condition were measured. vertical profile of them and cation-anion balance of interstitial water were examined. Distribution ratios of stable elements(Cs, Co, Cr, Zn, Sb)which can be applicable to distribution coefficients respectively, were estimated.In 1996, undisturbed soil was taken from surface to the depth of about 80cm in weed land at KUR-RI.Concentrations of main ionic substances(especially potassium and nitrate)were abruptly decreased at the depth of 15cm, thus indicating dissolution of organic materials in soil. Total cation was almost equal to total anion.In 1997, disturbed soils(A,B,C,D)were taken from surface to the depth of 20cm with core sampler in cultivated field at Maibara-cho. Concentrations of main ionic substances were gradually decreased with depth, thus indicating addition of fertilizer onto soil surface. At Apoint, total cation was 2-5 times lager than total anion, owing to no analysis of alkalinity. Cation-anion ratio was almost unity at B,C,D point. Distribution ratios between exchangeable content in soil and concentration of pore solution were calculated for Cs(10^1-10^3), Co(10^0-10^1), Cr, Zn, Sb(10^0-10^1). The Values were in the range of distribution coefficients which were indicated in previous works. This research develop the useful procedure to evaluate effective unsaturated distribution ratios.

在自然条件下，用超重力仪采集表层土壤和土壤孔隙水，测定了土壤中的某些元素。垂直剖面和间隙水的阴阳离子平衡进行了研究。1996年，在KUR-RI的杂草地中，从地表到80 cm深处，原状土壤中主要离子物质（特别是钾和硝酸盐）的浓度在15 cm处突然下降，表明土壤中有机质溶解。1997年，在舞原町的耕地上，用样芯取样器从地表至20 cm深处采集了扰动土壤（A、B、C、D）。土壤中主要离子物质的浓度随深度的增加而逐渐降低，表明土壤表面有施肥作用。在A点，由于没有分析碱度，总阳离子比总阴离子大2-5倍。在B、C、D点，阴阳离子比几乎为1。计算了Cs（10^1-10^3）、Co（10^0-10^1）、Cr、Zn、Sb（10^0 -10^1）的交换态含量与孔隙溶液浓度的分配比。这些值在以前的工作中指出的分配系数的范围内。本研究发展出一套评估有效不饱和分配比的实用程序。