大亚湾海域4种常见危化品对发光细菌的生物毒性研究

Study on biological acute toxicity of four common hazardous chemicals to luminescent bacteria in Daya bay

摘要: 采用发光细菌法对大亚湾海域海水进行生物急性毒性实验，掌握大亚湾海域海水水质情况，并对大亚湾海域海水进行4种危化品生物急性毒性实验。结果显示，7月和11月大亚湾海域各站位海水对发光细菌的抑制率均小于30%，为低度毒性风险。4种危化品生物急性毒性实验结果显示，甲醛对发光细菌的半抑制浓度IC₅₀为8.609 mg/L，甲醇对发光细菌的IC₅₀为0.048 mg/L，甲苯对发光细菌的IC₅₀为0.002 mg/L，苯酚对发光细菌的IC₅₀为43.484 mg/L，4种危化品对发光细菌的IC₅₀为甲苯<甲醇<甲醛<苯酚。

Abstract: In order to master the sea water quality of Daya bay, the biological toxicity experiment was carried out in Daya bay by using luminescent bacteria method. The luminescent bacteria were also employed to detect the acute toxicity of four kinds of hazardous chemicals by simulating the leakage of hazardous chemicals. Results showed that the inhibition rate of seawater to Photobacteria was less than 30% in July and November, which was a low toxicity risk. The results of acute toxicity text showed that the IC₅₀ of formaldehyde was 6.974 mg / L, the IC₅₀ of methanol was 0.048 mg / L, the IC₅₀ of toluene was 0.002 mg / L, the IC₅₀ of phenol was 43.484 mg / L. Moreover, the results of the acute toxicity showed that the IC₅₀ value of hazardous chemicals was toluene < methanol < formaldehyde < phenol.