Determining the efficiency of in situ iron remediation (ISIR) technology using ozonation in the Atlantis primary aquifer, Western Cape, South Africa

Abstract

In situ iron remediation (ISIR) applications has become a popular technique for reducing iron and manganese concentrations in boreholes that impose aesthetic and potable issues to groundwater quality and water supply schemes. Production borehole yields are reduced by screens clogged with iron and manganese precipitates, which jeopardizes groundwater extraction volumes and affect the supply of groundwater from supply schemes. Repeated ironand manganese-related borehole clogging in primary and fractured rock aquifers is a wellknown phenomenon in South Africa’s potable groundwater supply schemes.