Sand-sized limestone treatment of streams impacted by acid mine drainage

Direct single point, instreamapplications of limestone sand were made in twostreams severely acidified by acid mine drainage. After high flows distributed the sand downstream,dissolution of the limestone significantly reduced theacid loads in both streams. Data from the treatedstream sections and la...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2000-12, Vol.124 (3-4), p.411-428
Main Authors: MENENDEZ, Raymond, CLAYTON, Janet L, ZURBUCH, Peter E, SHERLOCK, Sean M, RAUCH, Henry W, RENTON, John J
Format: Article
Language:English
Subjects:
Acid mine drainage
Acidification
Applied sciences
Calcium carbonate
Continental surface waters
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environmental monitoring
Exact sciences and technology
High flow
Limestone
Mine drainage
Natural water pollution
Particle size
Pollution
Pollution, environment geology
Sand
Soil pollution
Streams
Water treatment and pollution
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Summary:Direct single point, instreamapplications of limestone sand were made in twostreams severely acidified by acid mine drainage. After high flows distributed the sand downstream,dissolution of the limestone significantly reduced theacid loads in both streams. Data from the treatedstream sections and laboratory experiments showed thatthe efficiency of treatment was more dependent onlimestone particle size than CaCO^sub 3^ content. Results from the stream treated with a narrow range oflimestone sand-sized particles showed a highutilization efficiency with nearly completedissolution of the limestone. The data indicated thatmonthly addition of limestone sand may be sufficientfor complete treatment of the streams studied. Ananalysis of such a treatment scheme indicated it to behighly cost efficient when compared to other activeand passive treatment systems.[PUBLICATION ABSTRACT]
ISSN:0049-6979
1573-2932
DOI:10.1023/A:1005264124166