中国环境科学

作者：李玉梅, 夏宇凡, 孟范平

单位：中国海洋大学海洋环境与生态教育部重点实验室, 山东 青岛 266100

关键词：丙苯,海水,急性毒性,物种敏感度分布法(SSD),短期海水水质基准(SSQC)

基金：国家自然科学基金项目(42077335)

At present, there is a lack of seawater quality standards for n-propylbenzene (n-PBZ) and isopropylbenzene (i-PBZ) both domestically and internationally, which is not conducive to pollution control and ecological risk assessment of such chemicals in the marine environment. In this study, the acute toxicity tests of n-PBZ and i-PBZ on four marine animals (Neomysis awatschensis, Artemia sp., Ruditapes Philippenarum, and Lateolabrax maculatus) were carried out, and then combined the obtained toxicity values with the reported toxicity values for marine microalgae in literature to construct the species sensitivity distribution (SSD) curves. By doing so, their hazardous concentration for 5% of marine species ((HC5) were calculated, and the corresponding short-term seawater quality criteria (SSQC) was derived. The half lethal concentrations (LC50) of n-PBZ and i-PBZ for marine animals ranged from 0.38to 83.89mg/L and 1.30to 119.11mg/L, respectively, and the N. awatschensis was most sensitive to both propylbenzenes. The HC5 values of n-PBZ and i-PBZ were 0.48 and 1.71mg/L, respectively, and the corresponding SSQC values were 0.16 and 0.57mg/L, respectively. According to the risk quotient (RQ) calculation, totally the ecological risk of propylbenzenes was relatively low in the investigated sea areas. However, in the seawater near oil exploitation regions, amedium ecological risk (RQ>0.1) was caused by relatively high concentrations of propylbenzenes. In addition, the marine ecological risk would reach a very high level in sea areas where propylbenzene leakage occured, and effective measures need to be taken to accelerate the elimination of pollution.

来源：2024年第11期

《中国环境科学》期刊编辑部

查看中国环境科学杂志2024年第11期