Although booster biocides (Irgarol, diuron, chlorothalonil, dichlofluanid, and DCOIT) have been detected in sediments along the Brazilian coastal areas, the risk associated to their occurrence and levels is still unknown. Thus, the ecological risk of booster biocides to sediment-dwelling organisms from the Brazilian coast was assessed using a risk characterization approach through the Risk Quotient (Measured environmental concentration (MEC)/Predicted no effect concentrations (PNECs)). Sedimentary PNECs for Irgarol, diuron, chlorothalonil and DCOIT were derived based on published ecotoxicological data from both freshwater and marine studies, while a NORMAN methodology was used to derived it for dichlofluanid. Results showed that DCOIT, diuron, Irgarol, chlorothalonil, and dichlofluanid can pose high risk on 47%, 35%, 15%, 1% and 1%, respectively, of the 113 Brazilian sites appraised. Considering the trend of expansion of navigation/maritime activities, DCOIT may worsen its impact over the coastal areas of Brazil, especially ports, but also ship/boatyards, marinas, and maritime traffic zones. The present study is an important contribution to support advance on policy formulation concerning booster biocides worldwide, particularly considering the lack of regulation on the use of antifouling biocides in Brazil.

尽管在巴西沿海地区的沉积物中已检测到加强杀菌剂（Irgarol，杜隆，百菌清，双氟氰胺和DCOIT），但与它们的发生和水平有关的风险仍然未知。因此，通过风险商数（测得的环境浓度（MEC）/预测的无作用浓度（PNEC）），采用风险表征方法，评估了来自巴西沿海的强化杀生物剂对沉积物生物的生态风险。Irgarol，diuron，百菌清和DCOIT的沉积PNEC是根据淡水和海洋研究的已公布生态毒理学数据得出的，而NORMAN方法则被用于二氯氟苯胺的提取。结果表明，DCOIT，敌草隆，依加洛尔，百菌清和敌百氟胺分别具有47％，35％，15％，1％和1％的高风险，被评估的113个巴西站点中。考虑到导航/海上活动的扩展趋势，DCOIT可能会加剧其对巴西沿海地区，尤其是港口，以及船舶/造船厂，码头和海上交通区域的影响。本研究为支持全球范围内有关加强型杀菌剂的政策制定工作做出了重要贡献，特别是考虑到巴西缺乏有关使用防污杀菌剂的法规。