Document Type

Thesis

Degree

Master of Science

Department

Chemistry

Advisor's Name

Piero R. Gardinali

Advisor's Title

Committee Chair

Advisor's Name

David Chatfield

Advisor's Name

Rudolf Jaffé

Keywords

Irgarol, Bioaccumulation, Uptake, Depurate, Florida, Marine, Submerged Aquatic Vegetation, Surface Water

Date of Defense

9-13-2010

Abstract

Irgarol 1051 is a common antifoulant toxic to certain marine organisms. Submerged aquatic vegetation (SAV) are exposed to this herbicide when it leaches into the marine environment from painted structures, making SAVs ideal candidates to function as sentinel indicator of contamination. In the initial stage of this study, Coconut Grove and Key Largo Harbor were assessed for environmental exposure to Irgarol. Water, sediment and SAVs were collected, the latter two subject to automated solid phase extraction, and all samples analyzed by GC/MS-SIM for Irgarol and its metabolite, M1. Of the vegetation analyzed, Halodule and Syringodium had the highest capacity to bioaccumulate Irgarol and M1. The root system and leaf contributed negligibly and significantly, respectively, to Irgarol uptake. In the final stage, a transplant between Coconut Grove and Chicken Key showed that the biota Thalassia and Halodule were able to uptake and depurate Irgarol, respectively, over a period of 30 days.

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