Aquatic Solutions International, Long Reef, NSW 2097, Australia; School of Natural Sciences, Macquarie University, North Ryde, NSW 2109, Australia.
Aquatic Solutions International, Airlie Beach, QLD 4802, Australia.
Mar Pollut Bull. 2023 Jul;192:114964. doi: 10.1016/j.marpolbul.2023.114964. Epub 2023 May 16.
A lack of thallium (Tl) toxicity data for marine organisms has hampered the development of water quality guidelines for protecting marine life and assessing ecological hazard/risk. This study assessed the toxicity (EC10/EC50) of Tl in natural seawater (salinity 34 psu and pH 8.05) to 26 functionally diverse marine organisms (19 phyla from five trophic levels) from a variety of temperate and tropical coastal marine habitats. EC10 values ranged from 3.0 μg/L (copepod, Acartia tranteri) to 489 μg/L (cyanobacterium, Cyanobium sp.), while EC50 values ranged from 9.7 μg/L to 1550 μg/L. Thallium(I) was the dominant (86-99 %) oxidation state in test waters across the range of EC10 and EC50 values. Thallium toxicity (EC10/EC50) did not differ between temperate and tropical marine organisms. New, reliable, long-term Tl water quality guidelines were derived using species sensitivity distributions (with model-averaging) to protect marine life in Australia (e.g., 3.9 μg/L for 95 % species protection).
缺乏铊 (Tl) 对海洋生物的毒性数据，阻碍了保护海洋生物和评估生态危害/风险的水质指南的制定。本研究评估了铊在天然海水中（盐度 34 ppt，pH 值 8.05）对 26 种功能多样的海洋生物（来自五个营养级的 19 个门）的毒性（EC10/EC50）。EC10 值范围从 3.0μg/L（桡足类，Acartia tranteri）到 489μg/L（蓝藻，Cyanobium sp.），而 EC50 值范围从 9.7μg/L 到 1550μg/L。在 EC10 和 EC50 值范围内的测试水中，Tl(I) 是主要（86-99%）氧化态。铊毒性（EC10/EC50）在温带和热带海洋生物之间没有差异。使用物种敏感性分布（结合模型平均法）得出了新的、可靠的、长期的铊水质指南，以保护澳大利亚的海洋生物（例如，95%的物种保护的 3.9μg/L）。
