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MDAG Case Study 15
These slowly dissolving retained reaction products can affect drainage chemistry long after the reactive primary minerals are ... reflect the short-term dissolution of the fresh, primary minerals rather than the accumulated secondary minerals. The reaction rates of primary minerals are more reliably obtained from laboratory kinetic tests ...
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MDAG Case Study 6
As is typical, the vertical profiles were divided into three zones from top to depth: the oxidized zone, the oxidizing secondary ... 3 to enlarge it. Dold et al. (1996) thought that the precipitation of secondary minerals was clogging porespaces and rendering the deeper tailings impermeable, causing inflowing seepage to ...
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MINTRAN
The sequence of reactions, involving acid-base, ... of dissolved metals is limited by the cyclical precipitation and dissolution of pH buffering minerals as the low pH front moves through the tailings and water. By varying selected ...
www.science.uwaterloo.ca

MINTOX
The model also simulates the two-dimensional reactive transport of ... the model. Important factors for the conceptual model include knowledge of the primary and secondary minerals which are present in the porous materials initially, and which may precipitate or dissolve ...
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Uranium Ore Minerals
It is an oxidation product of pitchblende and uraninite and most of the other primary minerals, and may also be derived from some other secondary minerals ...
dangerouslaboratories.org

Trimodal Soil Distribution
There are many different types of minerals. Minerals are just the unique way a particular group of chemical elements are arranged ... of minerals (secondary minerals) as water is lost to evaporation (such as in the upper ranges of the capillary fringe). Over time these secondary minerals may subsequently dissolve and later form new minerals ...
earthdrx.org

MDAG Case Study 28
This step-wise process creates shorter-lived secondary minerals and intermediate pH values. The reasons for the two preferred pH ranges are more ... transient intermediate pH values can tell us much about the complex precipitation-dissolution of minerals during the spatial and temporal migration of ARD through initially near-neutral materials. This ...
mdag.com

MRF > General Forum > Agenda 21
Sustainable Development and Minerals and Metals - Issue Paper 1995 Sustainable Development of Minerals and Metals - Monograph - Submission to the United Nations ... activities currently in progress to both level the playing field for recycling and secondary materials, as well as to protect ecosystems, communities, and workers. UNECE Ministerial ...
www.natural-resources.org

EPA Ground Water & Drinking Water
It causes gastrointestinal illness (e.g. diarrhea, vomiting, cramps). Radionuclides Alpha emitters. Certain minerals are radioactive and may emit a form of radiation known as alpha radiation. Some people ... get bone disease, including pain and tenderness of the bones). EPA has also set a secondary fluoride standard of 2 mg/L to protect against dental fluorosis. Dental fluorosis, in its ...
epa.gov

Minerals Engineering International - Environmental Issues: Refereed Publications
Application to mine Doyon, Quebec, Canada, Minerals Engineering, Vol. 21, No. 4, 2008 T. Deschamps, M. Benzaazoua, B. Bussiere, M. Aubertin ... reactors, Minerals Engineering, Vol. 21, No. 1, 2008 D. Mishra, Dong-Jin Kim, D.E. Ralph, Jong-Gwan Ahn and Young-Ha Rhee, Bioleaching of metals from spent lithium ion secondary ...
www.min-eng.com