Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Remediation of Acid Mine Drainages with Recycled Concrete Aggregates
Acid mine drainage (AMD) generated during mining operations is characteristically acidic and contains metals at concentrations that are toxic to aquatic ecosystems. This study, through laboratory testing and analysis, evaluated the low-cost construction waste product, recycled concrete aggregate (RCA) as a remediation material for AMD. Column leach tests (CLTs) were conducted to determine the effects of the four different RCAs on pH, electrical conductivity, iron (Fe), copper (Cu), and zinc (Zn) in AMD. Results of the CLTs suggest RCAs can effectively raise pH of the AMD and reduce concentrations of Cr, Cu, and Fe in AMD. The pH of AMD prior to treatment ranged from 2 to 4, and after treatment with the RCAs the pH of the AMD increased to above 11. Following RCA treatment, Cr concentrations in the AMD decreased by 22 to 62%, Cr concentrations reduced average of 85%, and Fe concentrations declined by over 98%.
Remediation of Acid Mine Drainages with Recycled Concrete Aggregates
Acid mine drainage (AMD) generated during mining operations is characteristically acidic and contains metals at concentrations that are toxic to aquatic ecosystems. This study, through laboratory testing and analysis, evaluated the low-cost construction waste product, recycled concrete aggregate (RCA) as a remediation material for AMD. Column leach tests (CLTs) were conducted to determine the effects of the four different RCAs on pH, electrical conductivity, iron (Fe), copper (Cu), and zinc (Zn) in AMD. Results of the CLTs suggest RCAs can effectively raise pH of the AMD and reduce concentrations of Cr, Cu, and Fe in AMD. The pH of AMD prior to treatment ranged from 2 to 4, and after treatment with the RCAs the pH of the AMD increased to above 11. Following RCA treatment, Cr concentrations in the AMD decreased by 22 to 62%, Cr concentrations reduced average of 85%, and Fe concentrations declined by over 98%.
Remediation of Acid Mine Drainages with Recycled Concrete Aggregates
Jones, Stephanie N. (Autor:in) / Cetin, Bora (Autor:in)
Geotechnical Frontiers 2017 ; 2017 ; Orlando, Florida
Geotechnical Frontiers 2017 ; 450-458
30.03.2017
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Remediation of Acid Mine Drainages with Recycled Concrete Aggregates
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