船舶废气的有毒影响闭环洗机洗水洗水
Zhiyi Ji1, Yunqi Yang1, Ying Zhu1
1College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, P.R. China.
Toxicology and industrial health
|July 8, 2023
概括
海洋洗机洗水对水生生物,包括藻类和鱼类构成重大毒性风险. 在排放之前处理这些洗水对于保护海洋生态系统免受PAH和重金属等有害污染物的影响至关重要.
科学领域:
- 海洋生态毒理学 海洋生态毒理学
- 环境化学环境化学
- 水生毒理学 水生毒理学
背景情况:
- 商船越来越多地使用废气清洁系统 (EGCS) 来减少硫排放.
- 将EGCS洗水排放到海洋环境中引发了生态问题.
- 闭环洗机 (-方法) 的洗水成分需要进行生态毒理学评估.
研究的目的:
- 调查闭环洗机洗水对关键海洋物种的有毒影响.
- 为了确定洗水中多环芳 (PAH) 和重金属的生态毒理影响.
- 评估EGCS洗水中的污染物的潜在协同效应.
主要方法:
- 对三种热带物种 (Dunaliella salina,Mysidopsis bahia,Mugilogobius chulae) 暴露在不同度的洗水中.
- 确定50%有效度 (EC50) 和50%致命度 (LC50) 的值.
- 在洗水中测量PAH和重金属总量,并与观察到的有毒作用相关联.
主要成果:
- 在D. salina,M. bahia和M. chulae中观察到严重的毒性作用,在特定的洗水度下.
- 对于D. salina的EC50-96h为2.48% (22.81微克L-1PAHs,23.67微克L-1重金属).
- 巴希亚和丘拉的LC50-7d分别为3.57%和20.50%,确定了LOEC值和相关污染物度.
结论:
- EGCS洗水对海洋生物具有显著的毒性,这可能是由于多种污染物的协同作用.
- 该研究强调需要进一步研究特定的有毒污染物及其相互作用.
- 强烈建议在海上排放之前预处理洗水,以减轻生态风险.
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