Synthesis of zero-valent iron particles for acid mine drainage reactive barriers: Experimental study and thermodynamic evaluation

Acid mine drainage (AMD) is acid water generation due to the effect of oxygen and atmospheric humidity on sulfide minerals - strongly associated with coal exploration. Permeable reactive barriers (PRBs) is an alternative to the treatment of groundwater contaminated by AMD. One of the first substance...

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Published inTecnologia em Metalurgia, Materiais e Mineracao Vol. 20110718; pp. 1214 - 1222
Main Authors Liendo, Maria Alejandra, Hidalgo, Gelsa Edith Navarro, Heck, Nestor Cezar, Sampaio, Carlos Hoffmann
Format Journal Article
LanguageEnglish
Published 01.01.2011
Subjects
Acid mine drainage
Atmospherics
Barriers
Coal mines
Iron
Synthesis
Thermodynamics
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Summary:Acid mine drainage (AMD) is acid water generation due to the effect of oxygen and atmospheric humidity on sulfide minerals - strongly associated with coal exploration. Permeable reactive barriers (PRBs) is an alternative to the treatment of groundwater contaminated by AMD. One of the first substances to be used in PRBs for groundwater remediation was zero-valent iron, ZVI. This reagent can be prepared with NaBH4. Aim of this work is to study the fundamentals for the synthesis of ZVI from Fe-Cl aqueous solutions, and the immobilization of metal ions with ZVI, with the assistance of a 'computational thermodynamics' tool. A concise experimental evaluation covering the preparation of ZVI as well as the reduction of Cu, Ni and Al ions followed the theoretical analysis.
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ISSN:2176-1515