Cheng Jiayi, Wang Ying, Li Yuxia, Kong Lingna, Wang Xiaomeng, Han Jianbo
National Marine Environmental Monitoring Center 1, No. 42 Linghe Str., Shahekou District, Dalian 116023, China.
Toxics. 2023 Jul 21;11(7):634. doi: 10.3390/toxics11070634.
With their unique geographical characteristics, semi-closed narrow bays are important places for human survival but vulnerable to pollution. Because pollutants (polycyclic aromatic hydrocarbons, PAHs) migrate and undergo transformation through a dynamic mechanism in bays of this type, environmental authorities have formulated a series of effective measures for pollution prevention and control, but these are difficult to realize. Based on monitoring and historical data, a multiphase-coupled hydrodynamic model combined with a carcinogenic risk-assessment model was able to solve the challenging environmental problem. Results showed that the hydrodynamic condition in the semi-closed narrow bay was very complex. A weaker hydrodynamic force had an adverse influence on the diffusion of pollutants, further amplified in part by the head of the semi-closed narrow bay, resulting in a higher ecological risk. The prediction results indicated that the total amount of PAHs transported from seawater to sediments was about 4.7 × 10 ng/year, which might cause serious threats to aquaculture or human health.
半封闭狭窄海湾因其独特的地理特征，是人类生存的重要场所，但易受污染。由于污染物（多环芳烃，PAHs）在这类海湾中通过动态机制迁移和转化，环境当局已制定了一系列有效的污染防治措施，但这些措施难以实现。基于监测和历史数据，一个多相耦合水动力模型与致癌风险评估模型相结合，能够解决这一具有挑战性的环境问题。结果表明，半封闭狭窄海湾的水动力条件非常复杂。较弱的水动力对污染物扩散有不利影响，部分在半封闭狭窄海湾的头部进一步放大，导致更高的生态风险。预测结果表明，从海水输送到沉积物中的PAHs总量约为4.7×10 ng/年，这可能对水产养殖或人类健康造成严重威胁。
