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| 題名: | Innovative mathematical modeling in environmental remediation |
| 作者: | 李明旭;Yeh, Gour-Tsyh;Gwo, Jin-Ping;Siegel, Malcolm D.;Li, Ming-Hsu;Fang, Yilin;Zhang, Fan;Luo, Wensui;Yabusaki, Steve B. |
| 貢獻者: | 地球科學學院水文與海洋科學研究所 |
| 關鍵詞: | acetates;adsorption;aluminum;analysis;aquifers;chelating agents;chemistry;chromium;cobalt;Computer Simulation;environmental models;Environmental Restoration and Remediation;ENVIRONMENTAL SCIENCES;Kinetics;laboratory experimentation;Land remediation;MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;mathematical models;Modeling;Models, Theoretical;nickel;nitrates;Radiation Monitoring;Radioactive contamination;Radioactive Pollutants;Radioactive Pollutants - analysis;Radioactive Pollutants - chemistry;radioactive waste;Reactive transport;remediation;SIMULATION;subwatersheds;technetium;toxicity;uranium;waste disposal |
| 日期: | 2013-01-01 |
| 上傳時間: | 2026-04-23 11:08:03 (UTC+8) |
| 出版者: | Elsevier Ltd.;England: Elsevier Ltd |
| 摘要: | 摘要： There are two different ways to model reactive transport: ad hoc and innovative reaction-based approaches. The former, such as the Kd simplification of adsorption, has been widely employed by practitioners, while the latter has been mainly used in scientific communities for elucidating mechanisms of biogeochemical transport processes. It is believed that innovative mechanistic-based models could serve as protocols for environmental remediation as well. This paper reviews the development of a mechanistically coupled fluid flow, thermal transport, hydrologic transport, and reactive biogeochemical model and example-applications to environmental remediation problems. Theoretical bases are sufficiently described. Four example problems previously carried out are used to demonstrate how numerical experimentation can be used to evaluate the feasibility of different remediation approaches. The first one involved the application of a 56-species uranium tailing problem to the Melton Branch Subwatershed at Oak Ridge National Laboratory (ORNL) using the parallel version of the model. Simulations were made to demonstrate the potential mobilization of uranium and other chelating agents in the proposed waste disposal site. The second problem simulated laboratory-scale system to investigate the role of natural attenuation in potential off-site migration of uranium from uranium mill tailings after restoration. It showed inadequacy of using a single Kd even for a homogeneous medium. The third example simulated laboratory experiments involving extremely high concentrations of uranium, technetium, aluminum, nitrate, and toxic metals (e.g., Ni, Cr, Co). The fourth example modeled microbially-mediated immobilization of uranium in an unconfined aquifer using acetate amendment in a field-scale experiment. The purposes of these modeling studies were to simulate various mechanisms of mobilization and immobilization of radioactive wastes and to illustrate how to apply reactive transport models for environmental remediation. ► The transformation of biogeochemical processes into reaction networks is a challenge. ► A reaction network is needed for truly reactive transport modeling. ► The distribution coefficient ranges from three to 13 orders of magnitude. ► The use of Kd approach to modeling reactive transport must be exercised with care. ► Calibrated reactive models can be exported to different environmental settings.
其他題名： J Environ Radioact
出版者： England: Elsevier Ltd
出版日期： 2013-05-01
出處： Journal of environmental radioactivity, 2013-05, Vol.119, p.26-38
版權： 2011 Elsevier Ltd
版權： Copyright © 2011 Elsevier Ltd. All rights reserved.
識別號： ISSN: 0265-931X
識別號： ISSN: 1879-1700
識別號： EISSN: 1879-1700
識別號： DOI: 10.1016/j.jenvrad.2011.06.010
識別號： PMID: 21813217 |
| 顯示於類別: | [水文與海洋科學研究所] 期刊論文
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