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Investigation of Mass Transfer Mechanism Associated with Water-Rock Reaction and Its Application to Resources and Environmental mental Problems

水岩反应传质机理研究及其在资源环境心理问题中的应用

基本信息

批准号：
18340175
负责人：
SHIKAZONO Naotatsu
金额：
$ 10.57万
依托单位：
Keio University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

Important results obtained by this study are summarized as follows.(1) Analytical study on hydrothermally altered rocks associated with hydrothermal are deposits ( kuroko deposits) clarified geochemical behavior of rare earth elements during the hydrothermal alteration.(2) Analytical study on base metals (i. e. Cr etc) and rare earth elements contaminated soils, river sediments and sands and experimental study on the extraction and water-rocks interaction clarified the concentrations and chemical states of base metal and rare earth elements.(3) Groundwater chemistry was interpreted based on analytical and thermo chemical data and water-rock interaction experiments. Computer simulation was also used for its interpretation. Water-rock interaction experiments and simulations were also applied to CO_2 underground sequestration and CO_2 capacity in aquifer and CO_2 behavior in underground were estimated and clarified.(4) Secondary minerals( clay minerals and carbonates) in sedimentary rocks were analyzed for base metals and rare earth elements and the factors controlling the concentrations of these elements ( ionic radii, charge, electronegativity etc) were considered. The retardation of radioactive elements released from nuclear waste was considered. The method preventing the release of base metal elements from contaminated soils was considered.(5) The simulation based on kinetics-fluid flow coupling model was carried out to interpret groundwater geochemistry and estimate residence time of groundwater in Mt. Fuji area.

本研究获得的重要结果总结如下。(1)通过对与热液弧型矿床（黑矿）有关的热液蚀变岩的分析研究，阐明了热液蚀变过程中稀土元素的地球化学行为。(2)贱金属分析研究（一）e. Cr等）和稀土元素污染的土壤、河流沉积物和砂土，通过萃取和水-岩相互作用实验研究，明确了贱金属和稀土元素的含量和化学状态。(3)地下水化学解释的基础上分析和热化学数据和水-岩相互作用实验。计算机模拟也被用来解释它。通过水-岩相互作用实验和模拟，对CO_2地下封存进行了研究，估算并阐明了含水层中CO_2的容量和CO_2在地下的行为。(4)分析了沉积岩中次生矿物（粘土矿物和碳酸盐）中的贱金属和稀土元素，并考虑了控制这些元素浓度的因素（离子半径、电荷、电负性等）。审议了核废料释放的放射性元素的阻滞问题。探讨了防止污染土壤中贱金属元素释放的方法。(5)采用基于动力学-流体流动耦合模型的数值模拟方法，对天山北麓的地下水地球化学进行了解释，并估算了地下水的滞留时间。富士地区。