scholarly journals A Laboratory Experiment System for Developing Mine Drainage Treatment Technologies Using Constructed Wetlands—Sequencing Batch Treatment of Cd-Containing Neutral Mine Drainage—

2021 ◽  
Vol 67 (3) ◽  
pp. 111-116
Author(s):  
Satoshi SODA ◽  
Ryo SASAKI ◽  
Thi Thuong NGUYEN ◽  
Kentaro HAYASHI ◽  
Akihiro KANAYAMA
Keyword(s):  
Laboratory Experiment ◽  
Constructed Wetlands ◽  
Mine Drainage ◽  
Experiment System ◽  
Treatment Technologies ◽  
Neutral Mine Drainage ◽  
Batch Treatment

Using Decomposition Kinetics to Model the Removal of Mine Water Pollutants in Constructed Wetlands

1994 ◽  
Vol 29 (4) ◽  
pp. 219-226 ◽  
Author(s):  
William J. Tarutis ◽  
Richard F. Unz
Keyword(s):  
Organic Matter ◽  
Constructed Wetlands ◽  
Mine Drainage ◽  
Term Treatment ◽  
Decomposition Kinetics ◽  
Dry Density ◽  
Organic Matter Concentration ◽  
Long Term Treatment ◽  
Input Variables ◽  
Reaction Stoichiometry

Although numerous mathematical models have been used to describe decomposition, few, if any, have been used to model the removal of pollutants in constructed wetlands. A steady-state model based on decomposition kinetics and reaction stoichiometry has been developed which simulates the removal of ferrous iron entering wetlands constructed for mine drainage treatment. Input variables for the model include organic matter concentration, reaction rate coefficient, porosity and dry density, and hydraulic detention time. Application of the model assumes complete anaerobic conditions within the entire substrate profile, constant temperature, no additional organic matter input, and subsurface flow only. For these ideal conditions, model simulations indicate that wetlands constructed with readily decomposable substrates rich in organic carbon are initially capable of removing far greater amounts of iron than wetlands built with less biodegradable substrates. However, after three to five years of operation this difference becomes negligible. For acceptable long-term treatment performance, therefore, periodic additions of decomposable organic matter will be required.

scholarly journals In Situ Production of Zoospores by Five Species of Phytophthora in Aqueous Environments for Use as Inocula

Plant Disease ◽  
2014 ◽  
Vol 98 (4) ◽  
pp. 551-558 ◽  
Author(s):  
G. A. Ridge ◽  
S. N. Jeffers ◽  
W. C. Bridges ◽  
S. A. White
Keyword(s):  
Laboratory Experiment ◽  
Constructed Wetlands ◽  
Aquatic Plant ◽  
Phytophthora Cinnamomi ◽  
Soil Extract ◽  
Greenhouse Experiment ◽  
Zoospore Release ◽  
Aqueous Environments ◽  
Over Time

The goal of this study was to develop a procedure that could be used to evaluate the potential susceptibility of aquatic plants used in constructed wetlands to species of Phytophthora commonly found in nurseries. V8 agar plugs from actively growing cultures of three or four isolates of Phytophthora cinnamomi, P. citrophthora, P. cryptogea, P. nicotianae, and P. palmivora were used to produce inocula. In a laboratory experiment, plugs were placed in plastic cups and covered with 1.5% nonsterile soil extract solution (SES) for 29 days, and zoospore presence and activity in the solution were monitored at 2- or 3-day intervals with a rhododendron leaf disk baiting bioassay. In a greenhouse experiment, plugs of each species of Phytophthora were placed in plastic pots and covered with either SES or Milli-Q water for 13 days during both summer and winter months, and zoospore presence in the solutions were monitored at 3-day intervals with the baiting bioassay and by filtration. Zoospores were present in solutions throughout the 29-day and 13-day experimental periods but consistency of zoospore release varied by species. In the laboratory experiment, colonization of leaf baits decreased over time for some species and often varied among isolates within a species. In the greenhouse experiment, bait colonization decreased over time in both summer and winter, varied among species of Phytophthora in the winter, and was better in Milli-Q water. Zoospore densities in solutions were greater in the summer than in the winter. Decreased zoospore activities for some species of Phytophthora were associated with prolonged temperatures below 13 or above 30°C in the greenhouse. Zoospores from plugs were released consistently in aqueous solutions for at least 13 days. This procedure can be used to provide in situ inocula for the five species of Phytophthora used in this study so that aquatic plant species can be evaluated for potential susceptibility.

Treatment of Mine Drainage by Anoxic Limestone Drains and Constructed Wetlands

1998 ◽  
pp. 303-319 ◽  
Author(s):  
R. L. P. Kleinmann ◽  
R. S. Hedin ◽  
R. W. Nairn
Keyword(s):  
Constructed Wetlands ◽  
Mine Drainage ◽  
Anoxic Limestone Drains

Mineralogy and geochemistry of the copper-dominated neutral mine drainage at the Cu deposit Ľubietová-Podlipa (Slovakia)

2018 ◽  
Vol 92 ◽  
pp. 59-70 ◽  
Author(s):  
Juraj Majzlan ◽  
Martin Števko ◽  
Martin Chovan ◽  
Jarmila Luptáková ◽  
Stanislava Milovská ◽  
...  
Keyword(s):  
Mine Drainage ◽  
Neutral Mine Drainage

Geochemistry of rare earth elements in a neutral mine drainage environment, Anjir Tangeh, northern Iran

2017 ◽  
Vol 183 ◽  
pp. 120-135 ◽  
Author(s):  
Majid Shahhosseini ◽  
Faramarz Doulati Ardejani ◽  
Ernest Baafi
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mine Drainage ◽  
Northern Iran ◽  
Neutral Mine Drainage

Evaluation of Metal Removal and Toxicity Reduction in a Low Sulfate Mine Drainage by Constructed Wetlands

1995 ◽  
Vol 1995 (1) ◽  
pp. 78-92 ◽  
Author(s):  
G. H. Farmer ◽  
D. M. Updegraff ◽  
J. M. Lazorchak ◽  
E. R. Bates
Keyword(s):  
Constructed Wetlands ◽  
Mine Drainage ◽  
Metal Removal ◽  
Toxicity Reduction
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