地下水中铀的反应运移模拟

MerkelB.

地下水中铀的反应运移模拟

MerkelB.

德国弗莱堡工业大学地质学院, 弗莱堡

详细信息

作者简介:
MerkelB.：Broder Merkel, 男, 1983年获德国慕尼黑大学博士学位, 现任德国Freiberg工业大学地质生态学院院长、水文地质主讲教授, 主要从事地下水污染研究和教学工作

中图分类号: P641.2;P641.3;X753
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出版历程
- 收稿日期: 2000-05-26
- 刊出日期: 2000-09-25

REACTIVE TRANSPORT MODELING OF URANIUM IN GROUNDWATER

Merkel B.

Institute of Geology, Freiberg Technical University, Freiberg, Germany

摘要

摘要: 地下水中铀的反应运移模拟对地下水保护和铀矿区的恢复都很重要, 因为铀是一种化学毒害性很高的放射性元素.在地下水及水与固体之间都应考虑对流、弥散、稀释、吸附等化学相互作用.介绍了德国德累斯顿市附近的Koenigstein矿区淋滤条件的可行性研究结果.由于反应运移模拟需占用大量的CPU时间, 所有的运行在一天内完成, 但用简单的混合法进行了稀释.对于这种研究, PHREEQC 2.2证明是一个功能很强的工具.与PHREEQC相对应的数据库WATEQ4F涉及到48种元素、400多种物质、300多种矿物.根据铀和镭的特性, 对其作了一定的修改, 以使它更具相容性和可靠性.
- 地下水 /
- 铀 /
- 反应运移模拟
Abstract: Modeling migration of uranium in groundwater is important for both groundwater protection and rehabilitation strategies of uranium mining sites due to the fact that uranium is both a radioactive element and an element with high chemical toxicity. Advection, dispersion, dilution, sorption and chemical interactions both in water and between water and solids have to be taken into account. This paper presents results which have been done in the context of the feasibility study for the in situ leaching mine Koenigstein near Dresden(Germany). Since reactive transport modeling is consuming a lot of CPU time all runs were performed 1 d but taken into account dilution by means of a simple mixing approach. PHREEQC version 2.2 proved to be a powerful tool for this kind of investigations. The database WATEQ4F which comes with PHREEQC containing 48 elements, more than 400 species and more than 300 minerals, was modified with respect to uranium and radium making it more consistent and reliable.
- groundwater /
- uranium /
- reactive transport modeling

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图 1 德累斯顿市东南的Koenigstein矿区(萨克森州)

Fig. 1. Site map of the Koenigstein uranium mine in southeast of Dresden (Saxonia)

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图 2 Koenigstein矿区穿过易北河地堑山谷的南北向横剖面

1.滞水层; 2.地下水位; 3.花岗岩; 4.Koenigstein矿区; 5.径流方向

Fig. 2. S-N cross section through the Elbe graben valley at the Koenigstein site

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图 3 酸性矿淋滤水和未被污染的地下水混合后铀的浓度随pH变化

Fig. 3. Concentration of uranium-species with respect to pH-value due to mixing acid mine leaching water with uncontaminated groundwater

a.UO₂SO₄; b.UO₂ (SO₄)₂^2-; c.UO₂²⁺; d.UO₂F⁺; e.UO₂CO₃

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图 4 铀和一些元素的穿透曲线, 表明阳离子交换对铝和钙很重要, 但对铀却并非如此

Fig. 4. Breakthrough curve for uranium and selected elements showing that cation exchange is an important process for aluminum and calcium but not for uranium

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图 5 铀和一些元素的穿透曲线, 假设柱铀矿、石膏和氢氧化铁可能出现

Fig. 5. Breakthrough curve for uranium and selected elements assuming that schoepite, gypsum and Fe (OH) ₃ may form

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参考文献(2)

[1]	Kinzelbach W. Numerische Methoden zur Modellierung des Stofftransports von Schadstoffen im Grundwasser[J]. München, Wien: Oldenbourg Verlag, 1987. https://www.cnki.com.cn/Article/CJFDTOTAL-DGYJ201904008.htm
[2]	Nitzsche O, Merkel B. Reactive transport modeling of uranium 238 and radium 226 in groundwater of the Koenigstein uranium mine, Germany[J]. Hydrogeology Journal, 1999, 7(5): 423~430.