Formation process of the natural derived arsenic contaminated Alluvial in the arsenic ground water problem.

天然衍生砷污染冲积物的形成过程中砷地下水问题。

• 批准号: 13680599
• 负责人: KUBOTA Yoshihiro
• 金额: $ 2.37万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680599/
• 关键词: arsenic contaminated ground water; arsenic; soil; lake deposits; bioaccumulation; peaty deposits; muddy deposits; organic deposits; 自然由来ヒ素; 潟湖地域; 泥炭層; 土壌層; 泥質細粒層; ヒ素の濃集; 佐潟; 佐潟(砂丘湖); 湖底堆積物; 泥炭; 高濃度ヒ素濃集; ヒ素濃度の経年変化; ヒ素濃集と生物作用; 沖積層の形成過程

This research makes the purpose of natural derived arsenic behavior in the Alluvium to solve the arsenic ground water problem. The investigated area is mainly the Niigata Plain and the Hetau Plain, Inner Mongolia, China as well. The quantities of arsenic in deposits were measured by the method of the atomic absorption spectrometry, the X-ray fluorescence analysis(XRF), and the inductively coupled plasma spectrometry(ICP).In the research of first year, arsenic concentrations highly range from approximately 50 to 100ppm in the peaty deposits in Lake Sakata. The lake is closed by sand dunes without factories and influx rivers around there. After the next year the primary factor of arsenic concentration in lake deposits was mainly examined. The arsenic concentration in the surface deposits of Lake Sakata changed through one year with two peaks of June(Early Summer) and September(Early Autumn) ranged from 40 to 70ppm. The influence of the agricultural chemical, trade name "Arsenic-Lead", was examined but lead concentrations was normal of 10 to 26ppm. Li the drilling cores in the areas of eastern Sakata(5m depth), the Hayagata (50m), and the Uwasekigata(10m), buried lake or lagoon deposits were. Arsenic concentrated on peaty to organic deposits of 20 to 190ppm, 10 to 50m below the surface.In the Hetau Plain, China, arsenic concentrations range from 10 to 24ppm in peaty to muddy-organic, deposits, as well. The arsenic concentrations of the river water in the Huanghe(Yellow River) and tributary rivers to the Hetau Plain range from 14 to 17ppm and 17 to 22ppm each. This means that soils highly concentrated arsenic in the backland flowed out and in flood deposited in the plain.These evidence lead to the conclusions that the arsenic in the Alluvium derived from organic soils and the mechanism of the concentration of arsenic in the closed lake is considered due to biological action, e.g. Bioaccumulation.

本研究的目的是通过冲积层中天然砷的行为来解决地下水中砷的问题。调查区域主要是中国内蒙古的新泻平原和河套平原。通过原子吸收光谱法、X射线荧光分析法（XRF）和电感耦合等离子体光谱法（ICP）对沉积物中砷的含量进行了测定。湖泊被沙丘封闭，周围没有工厂和流入河流。第二年以后，主要考察了影响湖泊沉积物中砷含量的主要因素。酒田湖表层沉积物中砷的浓度在一年中有两个峰值，分别为6月（初夏）和9月（初秋），范围为40 - 70 ppm。农业化学品的影响，商品名“砷铅”，进行了检查，但铅浓度是正常的10至26 ppm。在Sakata东部（5 m深）、Hayagata（50 m）和Uwasekigata（10 m）区域的钻探岩心中，埋藏湖泊或泻湖沉积物。砷主要集中在10 ~ 50 m深的泥炭质-有机质沉积物中，砷含量在20 ~ 190 ppm之间，在中国的河套平原，泥炭质-泥质-有机质沉积物中砷含量在10 ~ 24 ppm之间。黄河及其支流河水中砷含量分别为14 ~ 17 ppm和17 ~ 22 ppm。这表明，沉积物中的砷主要来源于有机质，封闭湖泊中砷的富集机制可能是生物作用，即生物富集。

项目成果

久保喜裕: "重金属による有害地層と汚染地層の境界問題"楡井 久編著, 東海大学出版会(予定). 200 (2003)

Yoshihiro Kubo：《危险地层与重金属污染地层之间的边界问题》，那水恒主编，东海大学出版社（计划）200（2003）。

久保田喜裕: "河川作用と環境問題-自然由来ヒ素の供給を例に-"地学団体研究会第5回総会(山形)公園要旨集. 78-82 (2001)

久保田义弘：“河流作用与环境问题——以天然砷的供应为例——”地质学会研究组第五次全体会议摘要（山形）公园78-82（2001）。

Yoshihiro Kubota: "Shizenyurai no chiso-osen."Niigataken-Chigakukyokaishi. 35. 6-12 (2003)

久保田义宏：“Shizenyurai no chiso-osen”。“Niigataken-Chigakukyokaishi”。

Yoshihiro Kubota: "Sakata ni okeru shizenyurai-konodo hisoganyu-koteitaisekibutsu no keiseiyoin."Heisei 13-nendo Niigata-shi Sakata gakujutsu-kenkyu.. 1-22 (2002)

久保田义博：“Sakata ni okeru shizenyurai-konodo hisoganyu-koteitaisekibutsu no keiseiyoin.”Heisei 13-nendo Niigata-shi Sakata gakujutsu-kenkyu.. 1-22 (2002)

Hisasi Nirei ed.: "Stratp Pollution and toxically natural sediments on heavy metals."Tokai Univ.Press(publication scheduled). (2004)

Hisasi Nirei 编辑：“Stratp 污染和重金属有毒天然沉积物”。东海大学出版社（预定出版）。