Residual Radioactivity From The Treatment Of
Water For Urban Domestic Applications
Author(s)
R. Kleinschmidt
Abstract
An assessment of radiologically enhanced residual materials generated during
treatment of domestic water supplies in southeast Queensland, Australia was
conducted. Radioactivity concentrations of 3H, 210Po, 222Rn, 226/228Ra, uranium
and thorium in water sourced from both surface water catchments and ground
water resources were examined both pre- and post-treatment under typical water
treatment plant operations. Surface water treatment processes included
sedimentation, coagulation, flocculation and filtration, while the groundwater
was treated using cation exchange resins. Waste products generated during
treatment included sediments, filtration media, used ion exchange resin,
backwash and wastewaters. Elevated residual concentrations of radionuclides
were identified in these waste products. The waste product activity
concentrations were used to model the radiological impact of the materials when
either utilised for beneficial purposes, or upon disposal. The results indicate that,
under current water resource exploitation programs, reuse or disposal of the
treatment wastes do not pose a significant radiological risk, however, regulatory
disposal limits may be exceeded for disposable carbon filters from household
point-of-use treatment systems. The impact of population growth and changes in
water supply sources are also considered.
Keywords: water treatment, radioactivity, TENORM, waste.
1 Introduction
As the population of southeast Queensland, Australia, continues to increase, the
need for adequate water resources will continue to expand. Alternative supplies
will be required to meet the demands for water as traditional sources become
Keywords
water treatment, radioactivity, TENORM, waste.
Related Book
Other papers in this volume
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