State Key Laboratory of Marine Pollution and Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China.
The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China.
Mar Pollut Bull. 2022 Aug;181:113878. doi: 10.1016/j.marpolbul.2022.113878. Epub 2022 Jun 29.
Excessive intake of retinoic acids (RAs) and the oxidative metabolites, 4-oxo-RAs, can lead to abnormal morphological development in animals. This study investigated spatiotemporal variations of concentrations and compositions of these compounds in Hong Kong's seawater and during algal blooms. Total concentrations of the studied compounds in seawater were up to 0.790 and 0.427 ng/L in dry and wet seasons, respectively, though no significant seasonal variation was observed. Spatially, the Deep Bay Water Control Zone was the most enriched area with the studied compounds owing to its semi-enclosed nature and influence from the Pearl River discharge. During algal blooms, the studied compounds were detected up to 4.74 ng/L. Based on calculated risk quotients, the ecological risk of the studied compounds to Hong Kong's marine ecosystems was low. Nevertheless, the occurrence and distribution of these chemicals in the marine environment should be closely monitored where algal blooms frequently occur.
过量摄入视黄酸（RAs）及其氧化代谢物 4-氧代-RAs，会导致动物形态发育异常。本研究调查了香港海水和赤潮期间这些化合物的浓度和组成的时空变化。海水中研究化合物的总浓度在旱季和雨季分别高达 0.790 和 0.427ng/L，尽管没有观察到明显的季节性变化。在空间上，由于半封闭性质和珠江排放的影响，赤湾水控区是最富含有机物的区域。在赤潮期间，研究化合物的浓度高达 4.74ng/L。根据计算的风险商数，这些化合物对香港海洋生态系统的生态风险较低。然而，在赤潮频繁发生的地区，应密切监测这些化学物质在海洋环境中的存在和分布。
