Photoenhanced Toxicity of Petroleum to Aquatic Invertebrates and Fish.
Arch Environ Contam Toxicol
; 73(1): 40-46, 2017 Jul.
Article
em En
| MEDLINE
| ID: mdl-28695259
ABSTRACT
Photoenhanced toxicity is a distinct mechanism of petroleum toxicity that is mediated by the interaction of solar radiation with specific polycyclic aromatic compounds in oil. Phototoxicity is observed as a twofold to greater than 1000-fold increase in chemical toxicity to aquatic organisms that also have been exposed to light sources containing sufficient quantity and quality of ultraviolet radiation (UV). When tested under natural sunlight or laboratory sources of UV, fresh, and weathered middle distillates, crudes and heavy oils can exhibit photoenhanced toxicity. These same products do not exhibit phototoxicity in standard test protocols because of low UV irradiance in laboratory lighting. Fresh, estuarine, and marine waters have been shown to have sufficient solar radiation exposure to elicit photoenhanced toxicity, and a diversity of aquatic invertebrate and fish species can exhibit photoenhanced toxicity when exposed to combinations of oil and UV. Risks of photoenhanced toxicity will be greatest to early life stages of aquatic organisms that are translucent to UV and that inhabit the photic zone of the water column and intertidal areas exposed to oil.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Petróleo
/
Peixes
/
Invertebrados
Limite:
Animals
Idioma:
En
Revista:
Arch Environ Contam Toxicol
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Estados Unidos