Deriving freshwater safety thresholds for hexabromocyclododecane and comparison of toxicity of brominated flame retardants

作者：Dong Liang^*; Theng Lei; Yang Suwen; Yan Thenguang; Jin Weidong; Yan Yuhong

来源：Ecotoxicology and Environmental Safety, 2017, 139: 43-49.

DOI：10.1016/j.econv.2017.01.005

• Hexabromocydododecane
• Brominated flame retardants
• Native species
• Species sensitivity distribution models
• Acute safety threshold
• Chronic safety threshold

Hexabromocyclododecane (HBCD) is a brominated flame retardant used throughout the world. It has been detected in various environmental media and has been shown toxic to aquatic life. The toxic effects of HBCD to aquatic organisms in Chinese freshwater ecosystems are discussed here. Experiments were conducted with nine types of acute toxicity testing and three types of chronic toxicity testing. After comparing a range of species sensitivity distribution models, the optimal model of Bull III was used to derive the safety thresholds for HBCD. The acute safety threshold and the chronic safety threshold of HBCD for Chinese freshwater organisms were found to be 2.32 mg/L and 0.128 mg/L respectively. Both values were verified by the methods of the Netherlands and the United States. HBCD was found to be less toxic compared to other widely used brominated flame retardants. The present results provide valuable information for revision of the water quality standard of HBCD in China.

• 出版日期2017-5
• 单位北京师范大学; 中国环境科学研究院