SUNConferences, SAIIE NeXXXt

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Flow Properties Upon Treatment of Acid Mine Drainage using Pervious Concrete Slabs
Lindelwa Mafanya, Daramy Vandi Von Kallon, Siphiwe Phil Simelane

Last modified: 2019-08-29

Abstract


While mining is an important revenue generating industry, several environmental consequences are associated with it. The formation of a metal-rich acid solution known as Acid Mine Drainage (AMD) is one such environmental consequence of some mining operations. In most cases it is desirable to prevent AMD, however, since this is not always possibly, treatment of AMD will mostly be required. It has been found that Pervious Concrete has waste water treatment qualities, however limited work has been done to establish those qualities. The aim of this study is to investigate and establish the relationship between flow rate of AMD through a porous medium such as pervious concrete and the thickness of Pervious Concrete wall. This is done in order to achieve a low cost, yet effective method that can improve treatment of AMD for communities, especially in South Africa, affected by AMD. AMD samples are collected from South32 coal mine, which have high sulphate content, for laboratory testing. To predict fluid flow through pervious concrete as a medium, a various test are developed on cubes of pervious concrete. The results show that as AMD is filtered through the layers of pervious concrete precipitates of heavy metals may be removed. The pervious concrete layers also helps to increase PH level of AMD to more acceptable values making concurrent absorption and neutralization a possible alternative.

Keywords: Pervious Concrete, AMD, Hydraulic Conductivity.

 


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