Deveropment of analysis method to detect polution record of heavy metal in coral at polution site

污染现场珊瑚重金属污染记录检测分析方法的开发

• 批准号: 24651009
• 负责人: OKUDA TETSUJI
• 金额: $ 2.58万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24651009/
• 关键词: 珊瑚; 鉛; 重金属; 汚染; 散乱Ｘ線; 蛍光X線; 定量分析; 環境計測; 蛍光Ｘ線分析; 汚染履歴; 河川水; 蛍光X線分析; 散乱X線

In Dominican Republic, we could find and sample some corals survived from 2000 year in the mouth of river in which watershed areas had extensive lead pollution at around 2000. In addition, we analyzed lead concentration for two corals in captivity by the conventional methods, after one year cultivation with lead polluted artificial seawater of one week. It was found that three conventional methods has enough higher resolution (10 micro meter) but doesn't have sensibility to detect lead accumulated in environ.Improvements in micro x-ray fluorescence analyzer were carried out to detect Ba L lines in coral under atmospheric condition. A special collimator was placed between a sample and the detector, and the interior of the collimator could be evacuated. The sensitivity for Mg and Ka line was gained more than 1000, and the present instrument can be applied to perform quantitative analysis of Fe in the light matrix down to several ppm levels.

在多米尼加共和国，我们可以在2000年左右流域地区存在大面积铅污染的河口找到一些2000年存活下来的珊瑚并进行采样。此外，我们还用常规方法分析了两种圈养珊瑚在铅污染的人工海水中培养1周后的铅浓度。结果发现，三种常规方法具有足够高的分辨率（10微米），但对于检测环境中积累的铅不具有灵敏度。对微型X射线荧光分析仪进行了改进，以在大气条件下检测珊瑚中的Ba L线。在样品和探测器之间放置一个特殊的准直器，并且准直器的内部可以抽真空。对Mg和Ka线的灵敏度提高了1000以上，该仪器可以对轻基体中的Fe进行低至几个ppm水平的定量分析。

项目成果

Enhanced heavy metal immobilization in soil by grinding with addition of nanometallic Ca/CaO dispersion mixture.

• DOI: 10.1016/j.chemosphere.2012.06.030
• 发表时间: 2012-10
• 期刊: Chemosphere
• 影响因子: 8.8
• 作者: Srinivasa Reddy Mallampati;Y. Mitoma;T. Okuda;S. Sakita;Mitsunori Kakeda

単素子SDDを用いる蛍光XAFS測定系とカルシウム水溶液についてのK殻XAFS測定

使用单元件 SDD 和 K 壳 XAFS 测量钙水溶液的荧光 XAFS 测量系统

• 发表时间: 2012
• 期刊: X線分析の進歩
• 作者: 早川慎二郎;島本達也;野崎恭平;生天目博文;廣川健
• 通讯作者: 廣川健

Impact of steel slag on benthic community under semi-artificial environment

半人工环境下钢渣对底栖生物群落的影响

• 发表时间: 2013
• 作者: Akiyama Y;Yano H;Katayama T;Koba K;Nagao M;Okuda T;Nakai S;Tanimoto T;Yamamoto T;Nishijima W
• 通讯作者: Nishijima W

SDD用真空コリメーターの開発と大気中での軽元素蛍光X線分析

开发用于大气中SDD和轻元素荧光X射线分析的真空准直器

• 发表时间: 2014
• 期刊: X線分析の進歩
• 作者: 牧野泰希;吉岡剛志;百崎賢二郎;辻笑子;野口直樹;西脇芳典;橋本敬;本多定男;二宮利男;藤原明比古;高田昌樹;早川慎二郎
• 通讯作者: 早川慎二郎

Impact of steel slag on

钢渣对钢渣的影响

• 发表时间: 2013
• 作者: Akiyama YB;Yano H;Katayama T;Koba K;Nagao M;Okuda T;Nakai S,
• 通讯作者: Nakai S,