Butyltin Contamination in Fishing Port Sediments after the Ban of Tributyltin Antifouling Paint: A Case of Qianzhen Fishing Port in Taiwan

This study investigated the concentrations of monobutyltin (MBT), dibutyltin (DBT) and tributyltin (TBT) in sediments Qianzhen Fishing Port (Taiwan) 2020. Further, pollution status, composition, potential ecotoxicity BTs were evaluated. case provides a reference for benefits ban TBT-based antifouling paint to date. Results showed that total butyltin (?BTs, sum TBT, DBT, MBT) measured ranged between 14.2–807 ngSn·g?1 dw, with an average 356 ± 305 dw. TBT was most dominant species, concentration 303 287 is about 4.3 times lower than 2003, showing progress gradual degradation sediments. Still, rather slow, half-life 8.09 years. An analysis effects on organisms carried out according toxicity guidelines US Environmental Protection Agency assessment class criterion imposex (ACCI) Oslo Paris Commission (OSPAR). The results levels 80% may pose negative sensitive gastropods, half even have impact gastropod reproduction. These show marine life still affected threatened by compounds, despite decline since TBT-containing paints ships 2008. Therefore, it necessary continue paying attention changes their ecological risks environment, formulate management plans strategies mitigate impacts ecosystems.