ENVIRONMENTAL TRANSFORMATION OF 1-NITROPYRENE ON GLASS SURFACES
ENVIRONMENTAL TRANSFORMATION OF 1-NITROPYRENE ON GLASS SURFACES
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DOI：
10.1016/0004-6981(85)90200-8
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发表时间：
1985-01-01
影响因子：
5
通讯作者：
WHITE, JE
中科院分区：
文献类型：
--
作者：
BENSON, JM;BROOKS, AL;WHITE, JE
研究了固体1-硝基芘（NP）在自然光下的光化学/化学转化过程，以期对释放到大气中的硝基芳香族化合物的命运有一定的了解。涂有14c标记NP的玻璃板连续暴露在室外12-670小时。样品在环境温度和-20度下保存在黑暗中。C也进行了研究。用高压液相色谱法将分解产物从母体化合物中分离出来，用液体闪烁光谱法进行定量，并用标准光谱技术进行鉴定。NP击穿率可以用一个双分量指数拟合。快速击穿半次为14 h，较慢击穿半次为533 h。分解似乎导致硝基的损失，形成羟基芘，可能是芘二酮和二羟基芘，以及一些尚未确定的化合物。测定了在添加和不添加大鼠肝脏S-9的情况下，沙门氏菌TA-98对硝基芘及其分解产物的致突变活性。分解产物的致突变活性明显低于NP，可能是由于硝基的丢失。需要进一步的工作来确定这些结果是否也适用于空气中或表面沉积的与颗粒相关的NP。
The photochemical/chemical transformation of solid 1-nitropyrene (NP) in natural light was investigated to gain some understanding of the fate of nitroaromatic compounds released into the atmosphere. Glass plates coated with 14C-labeled NP were exposed continuously outdoors for periods of 12-670 h. Samples kept in the dark at ambient temperatures and at -20.degree. C were also studied. Breakdown products were separated from the parent compound by high-pressure liquid chromatography, quantitated by liquid scintillation spectroscopy and identified by standard spectroscopic techniques. The rate of NP breakdown could be fitted with a 2-component exponential. Half-times of breakdown for the rapid and slower components of breakdown are 14 and 533 h, respectively. Breakdown appears to have resulted in loss of the nitro group with formation of hydroxypyrene, possibly pyrene dione and dihydroxy pyrene, and several as yet unidentified compounds. Mutagenic activities of nitropyrene and its breakdown products were determined in Salmonella strain TA-98, with and without the addition of rat liver S-9. Mutagenic activities of breakdown products were significantly less than that of NP, probably because of loss of the nitro group. Further work is needed to determine if these results also apply to particle-associated NP that is airborne or deposited on surfaces.