Adsorption And Desorption Characteristics Of
Fluoride In The Calcareous And Siliceous Sand
Sheet Aquifers Of South-west Victoria, Australia
Author(s)
S. A. Salzman, G. Allinson, F. Stagnitti, R. J. Hill,
L. Thwaites, D. Ierodiaconou, R. Carr, J. Sherwood
& V. Versace
Abstract
This study assessed the sustainability of utilising groundwater systems to
manage an aluminium smelter’s fluoridated trade wastewater stream. Replacing
ocean discharge of the wastewater with land irrigation is one option. Using a
groundwater model (developed using MODFLOW incorporating parameter
estimation software (PEST-ASP)), we found that most of the groundwater flow
takes place through surface sands. Fluoride is adsorbed in these sands during the
drier summer months, but desorption is rapid when winter rain flushes the
aquifer. Underlying clays and other layers prevent significant contamination of
the deeper aquifer.
Keywords: groundwater flow, fluoridated trade wastewater, adsorbed,
desorption.
1 Introduction
Fluoride is considered to be the third most important air pollutant after sulphur
dioxide and ozone because it is highly toxic to some plant species [1]. Most
fluoride in or on terrestrial plants results from aerial fluoride, but small amounts
will be taken up from irrigation water [2], and soluble fluoride salts can be taken
Keywords
groundwater flow, fluoridated trade wastewater, adsorbed,
desorption.
Related Book
Other papers in this volume
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