水生态学杂志2025，Vol.46Issue(3)：22-31,10.DOI:10.15928/j.1674-3075.202501210003
基于SOM分析的重金属和有机农药对发光细菌急性毒性效应
Acute Toxicity of Heavy Metals and Organic Pesticides to Luminescent Bacteria Based on SOM Analysis
摘要
Abstract
In this study,we systematically evaluated the acute toxicity of 10 heavy metals and 10 organic pesticides using luminescence inhibition in Vibrio fischeri,as recommended by ISO.Differences and simi-larities in toxic effects of the tested substances were analyzed using Self-Organizing Map(SOM)neural network analysis.There were significant differences in the acute toxicities of the heavy metals and pesti-cides to luminescent bacteria.Based on the EC50 values,the toxicity of heavy metals ranked as follows:mercury II(mercuric chloride)>lead II(lead nitrate)>zinc II(zinc sulfate)>antimony III(potassium an-timony tartrate)>Iron III(ferric chloride)>cadmium II(cadmium chloride)>copper II(copper sul-fate)>nickel II(nickel chloride>chromium VI(potassium dichromate)>manganese II(manganese chlo-ride).The toxicity ranking of organic pesticides was as follows:imidacloprid>nicosulfuron>acet-amiprid>metalaxyl>glyphosate>triadimefon>cyfluthrin>trichlorfon>brassinolide>atrazine.Among them,mercury II(EC50=0.37 mg/L)and manganese II(EC50=257.48 mg/L)were the most and least toxic heavy metals.Imidacloprid(EC50=9.36 mg/L)and atrazine(EC50=6 044.52 mg/L)were the most and least toxic organic pesticides.SOM analysis shows that highly toxic pollutants(such as mercury II and imidacloprid)tended to cluster in high toxicity areas of the map,with similar EC50 value distribu-tion ranges(0.37-30.5 mg/L),indicating that their toxicity mechanisms to luminescent bacteria may be similar.Low toxicity pollutants such as atrazine,trichlorfon,and brassinolide distributed in another re-gion,with a wide range of EC50 values(2 244.92-6 044.52 mg/L),reflecting the significant differences in their toxicity.In addition,some heavy metals(such as mercury II and lead II)and pesticides(such as to-bacco,imidacloprid)exhibited a spatially adjacent distribution due to potentially similar mechanisms of action or metabolic pathways.In conclusion,our research elucidated the toxic action patterns of heavy metals and pesticides to luminescent bacteria,confirming the effectiveness of SOM in toxicity classifica-tion and mechanism exploration.The results of this study provide a reference for the biological toxicity test of environmental chemicals,and the emergency monitoring and ecological risk management of sud-den pollution events.关键词
发光细菌/急性毒性/重金属/有机农药/自组织映射神经网络Key words
luminesscent bacteria/acute toxicity/heavy metals/organic pesticides/Self-Organizing Map neural network analysis分类
医药卫生引用本文复制引用
刘信勇,朱利明,陈珊,郭芳,邹曦,刘洋洋,常志兵,张晓敏,肖新宗..基于SOM分析的重金属和有机农药对发光细菌急性毒性效应[J].水生态学杂志,2025,46(3):22-31,10.基金项目
湖北省重点研发项目(2024BCB064) （2024BCB064）
中国南水北调集团中线有限公司资助项目(NSBDZX/SH/YW/2022-002). （NSBDZX/SH/YW/2022-002）
