MP8 Control and Regulation of Non-indigenous Species
A105 & A106
1:20 PM - 4:40 PM, Monday
() Effects of Ozonation on CDOM in Ballast Water.
Young, H.1, Cooper, W.1, Herwig, R.2, Perrins, J.2, 1 UNCW Center for Marine Science, Wilmington, NC, 284092 School of Aquatic and Fishery Sciences, U. of Washington, Seattle, WA, 98195
ABSTRACT- There have been many studies on potential ballast water treatments, but a method has yet to meet with worldwide acceptance. Previous work by our group has shown that ozone treatment of ballast water is effective at killing organisms at many trophic levels. All natural waters contain dissolved organic matter (DOM), the portion of which absorbs light is termed chromophoric dissolved organic matter (CDOM). CDOM can be used to trace the organic carbon from river sources to the ocean. CDOM concentrations in estuaries and the open ocean have been shown to be quantitatively different both in concentration and character. Therefore, CDOM may be useful in determining the origin of ballast water and may also lead to a process for determining whether ballast water has been treated. Ozonation of ballast water is likely to produce differences in pre and post CDOM characters of the ballast water. This study will focus on ozonating waters from different sources, e.g. waters from Puget Sound and the Black River, to quantitatively determine the differences in CDOM fluorescence spectra before and after treatment.
Key words: Ballast Water, Ozone, CDOM, Fluorescence Spectroscopy