| Kinetic analysis of constructed systems for the recovery of contaminated areas by acid mine drainage. | |
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MedLine Citation:
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PMID: 22227807 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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INTRODUCTION: Flowing of the acid mine drainage may contaminate the adjacent water bodies causing substantial changes in the aquatic ecosystem. This aspect is the most relevant problem in the southern of Santa Catarina once the contaminated areas are inserted in the watershed of the Araranguá, Urussanga, and Tubarão rivers, increasing the need for recovery studies. These areas are between Criciúma, Içara, Urussanga, Siderópolis, Lauro Müller, Orleans, and Alfredo Wagner towns where a conservation unit exist called the Environmental Preservation Area of Baleia Franca. Aiming to compare the kinetics of the ash derived from burning coal and to neutralize acid mine drainage, different neutralizer, limestone, fly, and bottom ash, was mounted on a pilot scale experiment. DISCUSSION: The transport parameters showed the same order of infiltration and dispersion: fly ash < bottom ash < limestone. The order of measured alkalinity was: limestone < fly ash < bottom ash, with pH values of 9.34, 12.07, and 12.25, respectively. The limestone kinetics of acidic drainage neutralization was first order with reaction rate constant k = 0.0963 min(-1), bottom ash was 3/4 with k = 0.0723 mol(1/4) L(-1/4) min(-1), and the fly ash had higher order kinetics, 4/3, with reaction rate constant k = 27.122 L(1/3) mol(-1/3) min(-1). However, by mathematical modeling, it was found that due to a combination of transport and kinetics, only limestone treatment reached a pH above 6 within 5 years, corresponding to the ideal as planned. |
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Authors:
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Erlon Mendes; Erilson Barros; Jairo José Zocche; Nadja Zim Alexandre; Sérgio Luciano Galatto; Marcos Back; Jader Lima Pereira; Jonathan Frassetto; Elidio Angioletto |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-7 |
Journal Detail:
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Title: Environmental science and pollution research international Volume: - ISSN: 1614-7499 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9441769 Medline TA: Environ Sci Pollut Res Int Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Environmental and Technology Research Institute-IPAT, University of Southernmost Catarinense (UNESC), Jorge Lacerda Street, km 4,5, Sangão District, 88806-000, Criciúma, SC, Brazil, erlon@unesc.net. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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