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首页> 外文期刊>Mutation research. Genetic toxicology testing >STABILITY OF 1-NITROPYRENE AND 1,6-DINITROPYRENE IN ENVIRONMENTAL WATER SAMPLES AND SOIL SUSPENSIONS
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STABILITY OF 1-NITROPYRENE AND 1,6-DINITROPYRENE IN ENVIRONMENTAL WATER SAMPLES AND SOIL SUSPENSIONS

机译：1-硝基苯和1,6-二硝基苯在环境水样和土壤悬浮液中的稳定性

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摘要

This study examined the stability of mutagenic 1-nitropyrene (1-NP) and 1,6-dinitropyrene (1,6-diNP) in environmental water samples and various soil suspensions containing 0.1% peptone and in water samples containing no peptone. The water samples or the soil suspensions were mixed with NPs and incubated at 30 degrees C. The stability of NPs was expressed as mutagenic activity remaining in the test solutions. The mutagenicity decreased rapidly when 1-NP or 1,6-diNP was incubated in unautoclaved test solutions containing 0.1% peptone but not when incubated in autoclaved test solutions. The mutagenicity in the soil suspensions, especially in the sludge, decreased faster than in the water samples. This was due to the large number of colony-forming units (CFU) in the soil suspensions. In the water samples containing 0.1% peptone, the mutagenicity of NPs in the polluted Tamiya River water decreased faster than in the unpolluted Yoshino River water. The rate of decrease was dependent on the number of CFU in the water samples. A large number of CFU decreased the mutagenicity more rapidly than did a small number of CFU in samples. The disappearance of mutagenicity was dependent on the initial concentrations of NPs. The periods required for a 50% decrease in the mutagenicity of 1-NP at the low concentration (0.2 mu g/ml) was shorter than that at the high concentration (3 mu g/ml). 1-Aminopyrene was detected in the 1-NP test solution after incubation when it was analyzed by high-pressure liquid chromatography. In the water samples containing no peptone, the mutagenicity of 1-NP (0.2 mu g/ml) decreased gradually during 30 days of incubation. After incubation for 1540 days, the remaining mutagenicity of 1-NP in the water samples was almost the same as that in autoclaved water samples. On the other hand, the mutagenicity of 1,6-diNP (10 ng/ml) decreased and the remaining mutagenicity, except in the Yoshino River water, was less than 20% after 30 days of incubation and was completely lost during the 1540-day incubation. However, the mutagenicity of 1,6-diNP in autoclaved water samples was very stable and almost all mutagenicity, except in sea water, remained after 1540 days of incubation at 30 degrees C. These results suggest that the microflora in the environment plays an important role in the primary degradation and decontamination of relatively low concentrations of NPs.
机译：这项研究检查了诱变的1-硝基py（1-NP）和1,6-二硝基py（1,6-diNP）在环境水样品和含有0.1％蛋白ept的各种土壤悬浮液以及不含蛋白ept的水中的稳定性。将水样品或土壤悬浮液与NP混合并在30摄氏度下孵育。NP的稳定性表示为测试溶液中残留的诱变活性。当将1-NP或1,6-diNP在含有0.1％蛋白ept的未经高压灭菌的测试溶液中孵育时，致突变性迅速降低，但在经过高压灭菌的测试溶液中孵育时，诱变性则不会迅速降低。土壤悬浮液，特别是污泥中的致突变性比水样中的致突变性下降得更快。这是由于土壤悬浮液中有大量的菌落形成单位（CFU）。在含有0.1％蛋白ept的水样中，污染的田宫河水中的NPs的诱变性比未污染的吉野河水中的NPs下降更快。下降速度取决于水样中CFU的数量。与样品中少量CFU相比，大量CFU更快地降低了致突变性。致突变性的消失取决于NPs的初始浓度。在低浓度（0.2μg / ml）下1-NP致突变性降低50％所需的时间比在高浓度（3μg / ml）下缩短。通过高压液相色谱分析后，在孵育后的1-NP测试溶液中检测到1-氨基A。在不含蛋白ept的水样品中，在孵育30天期间1-NP（0.2μg / ml）的致突变性逐渐降低。孵育1540天后，水样品中1-NP的剩余诱变性几乎与高压灭菌水样品中的相同。另一方面，1,6-diNP（10 ng / ml）的致突变性降低，除吉野河水外，其余的致突变性在孵育30天后不到20％，并在1540-一天的孵化。但是，高压灭菌水样品中的1,6-diNP的致突变性非常稳定，除在海水中，几乎所有的致突变性均在30°C下孵育1540天后保持。在相对较低浓度的NPs的初级降解和去污中发挥重要作用。

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