Environmental engineering forum: long-term effects of wetland treatment of mine drainage
Article Abstract:
Three types of constructed wetlands for treating contaminated coal-mine drainage are presented. Aerobic constructed wetlands are suitable for handling alkaline mine water and those contaminated with iron or manganese. Mine water with an acidity of less than 300 mg L and contaminated with Fesup2+ and manganese can be treated with anoxic limestone drain and an aerobic wetland. Wetlands constructed using a calcareous, organic substrate can be used to treat mine water with an acidity greater than 300 mg L or containing Fesup3+ or aluminum.
Publication Name: Journal of Environmental Engineering
Subject: Environmental issues
ISSN: 0733-9372
Year: 1996
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Managed wetlands may be long-term solutions to mine-water treatment
Article Abstract:
A properly designed and constructed wetland may be an effective method to treat mine water for decades. Well defined and hydrologically tight volunteer wetlands that are several decades old are reported to be still capable of retaining iron and manganese. Saturated wetlands can be made to function again by lowering the flow rate of mine water. Supplementation of carbon and nutrients has been shown to stimulate iron retention and sulfate reduction.
Publication Name: Journal of Environmental Engineering
Subject: Environmental issues
ISSN: 0733-9372
Year: 1996
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Ability of subsoils to buffer extremely acidic simulated coal-pile leachates (comment on article by Zelmanowitz et al., Journal of Environmental Engineering, vol. 121, November 1995)(includes reply)
Article Abstract:
S. Zelmanowitz et al.'s paper on the ability of subsoils to buffer acidic coal-pile leachates is reviewed. Although Zelmanowitz et al. discussed several important issues on the complex mechanisms involved in soil buffering, other relevant issues, such as the effect of precipitation reactions on buffering process, were not mentioned. Alternative methods of data analysis are proposed.
Publication Name: Journal of Environmental Engineering
Subject: Environmental issues
ISSN: 0733-9372
Year: 1997
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