Synthesis of ZVI particles for acid mine drainage reactive barriers: Experimental and theoretical evaluation

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Abstract

Acid mine drainage (AMD) is acid water generation due to chemical action of oxygen and atmospheric humidity on sulfide minerals - strongly associated with coal exploration. Permeable reactive barrier (PRB) is an alternative process 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 the help of sodium borohydride, NaBH<inf>4</inf>, and iron chloride. This work aimed 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. © 2012 Elsevier Editora Ltda. and Brazilian Metallurgical, Materials and Mining Association.

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Liendo, M. A., Navarro Hidalgo, G. E., Sampaio, C. H., & Heck, N. C. (2012). Synthesis of ZVI particles for acid mine drainage reactive barriers: Experimental and theoretical evaluation. Journal of Materials Research and Technology, 1(2), 75–79. https://doi.org/10.1016/S2238-7854(12)70014-5

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