Pyrithiones as antifoulants: Environmental chemistry and preliminary risk assessment
- 1 May 2000
- journal article
- research article
- Published by Taylor & Francis in Biofouling
- Vol. 15 (1-3) , 175-182
- https://doi.org/10.1080/08927010009386308
Abstract
Pyrithiones are widely used as bactericides, fungicides, or algicides in a variety of products such as shampoos, metal working fluids, adhesives, sealants, and coatings. This broad antimicrobial activity, along with low water solubility and favorable environmental chemistry, makes zinc pyrithione and copper pyrithione potentially ideal replacements for TBT in marine antifouling paints. Several studies on the toxicity and environ‐ • mental fate of these pyrithiones have been conducted in freshwater and saltwater systems. Environmental fate studies show that pyrithiones rapidly degrade in the water column to less toxic compounds. Sediment accumulation is also prevented by the facile reduction of a critical functional group under anaerobic conditions. Modeling programs were used to calculate the predicted environmental concentration (PEC) for pyrithione. Comparison of PECs calculated for more persistent antifoulants with actual measured concentrations provided a measure of the bias inherent to the models. The results indicate a pyrithione risk quotient (PEC/PNEC) < 1. The findings are consistent with the absence of ecological effects during the long history of the use of zinc pyrithione as an antidandruff agent.Keywords
This publication has 11 references indexed in Scilit:
- A Deterministic Ecological Risk Assessment for Copper in European Saltwater EnvironmentsMarine Pollution Bulletin, 1999
- Determination of the antifouling agent zinc pyrithione in water samples by copper chelate formation and high-performance liquid chromatography–atmospheric pressure chemical ionisation mass spectrometryJournal of Chromatography A, 1999
- TributyltinPublished by Cambridge University Press (CUP) ,1996
- Coastal water contamination from a triazine herbicide used in antifouling paintsEnvironmental Science & Technology, 1993
- A two-compartment model for the dissipation of deltamethrin on soilJournal of Agricultural and Food Chemistry, 1985
- Oxygen in the Sea Bottom Measured with a MicroelectrodeScience, 1980
- Shear Flow DispersionPublished by Elsevier ,1979
- Photodegradation of mercaptopyridine-N-oxide biocidesArchives of Environmental Contamination and Toxicology, 1979
- Turnover of Pesticide Residues in SoilPublished by American Chemical Society (ACS) ,1976
- Structure and Behavior of Organic Analytical Reagents. Formation Constants of Transition Metal Complexes of 2-Hydroxypyridine-1-Oxide and 2-Mercaptopyridine-1-Oxide.Analytical Chemistry, 1964