Modeling of mineral fouling in an alkaline permeable reactive barrier in Australia

Citation data:

Computer Methods and Recent Advances in Geomechanics, Page: 623-628

Publication Year:
2014
Usage 54
Abstract Views 54
Citations 1
Citation Indexes 1
Repository URL:
http://ro.uow.edu.au/eispapers/2978
DOI:
10.1201/b17435-107
Author(s):
Pathirage, Punyama Udeshini; Indraratna, Buddhima; Mr Geoffrey McIntosh, Geoffrey; Banasiak, Laura
Publisher(s):
Informa UK Limited
Tags:
barrier; reactive; permeable; alkaline; fouling; mineral; australia; modeling; Engineering; Science and Technology Studies
book chapter description
Progress in the remediation of acidic groundwater generated from acid sulfate soil was achieved through the utilisation of an innovative geotechnical engineering technique, namely the installation of an alkaline Permeable Reactive Barrier (PRB) using recycled concrete particles as the reactive material in the Shoalhaven Floodplain, southeast New South Wales (NSW), Australia. The performance of the PRB has been monitored since its installation in October 2006 and it has proved effective in neutralising groundwater from »pH 3 to 7.3 and removing »95% of Al and Fe from the groundwater. A key outcome of this study was to develop an original model capturing geochemical reaction kinetics coupled with transient groundwater flows, supported by detailed laboratory and field testing. The model could predict the porosity and hydraulic conductivity due to secondary mineral precipitation. The hydraulic conductivity reduction in the field is only 3% at the entrance face and almost negligible in the middle and exit zones to date.