Methyl-triclosan and triclosan impact embryonic development of Danio rerio and Paracentrotus lividus

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Macedo, S (Author) Other; Torres, T (Author) Other; Santos, MM (Author) FCUP

Journal

Title: Ecotoxicology

Vol. 26

Pages: 482-489

ISSN: 0963-9292

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 43 Citations

Scopus - 45 Citations

Other information

Authenticus ID: P-00Q-D5T

DOI: 10.1007/s10646-017-1778-3

Abstract (EN): The presence of emerging pollutants in the environment is of major concern not only because of the potential negative impact in human health, but also due to the potential toxicity to non-target organisms. Within the personal and care products (PCPs), the disinfectant Triclosan (TCS) is one of the most concerning compounds. Once in the wastewater treatment plants (WWTPs), a small part of TCS can be biotransformed into a more persistent by-product: methyl-triclosan (M-TCS). Although several studies have focused on the occurrence of this compound in the water systems, the information on its toxicity to aquatic organisms is very limited. Here, we used embryo bioassays with two aquatic model animals to improve risk assessment of M-TCS; zebrafish (Danio rerio) embryo bioassays run up to 144 h post fertilization (hpf) and sea urchin (Paracentrotus lividus) up to 48 hpf, following established protocols. M-TCS and TCS exhibited similar toxicity to zebrafish with a NOEC of 160 A mu g/L. In contrast, M-TCS induced a delay in the development of the sea urchin larvae at all tested concentrations (1-1000 A mu g/L), whereas NOEC of TCS for P. lividus embryos was 40 A mu g/L. Overall, given the reported effects of M-TCS in the close range of environmentally relevant concentrations, and considering the low degradation rate and tendency to bioaccumulation (logKow: 5.2), further studies are warrant to better characterize the risk of this TCS metabolite to aquatic organisms.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8