含油污水光谱特性的研究

含油污水对良好水环境构成了极大威胁,其含油量将直接影响污染情况.光学检测是测量其含油量的重要方法,光学常数则是其测量的基础.利用TU-19双光束紫外可见分光光度计测量了2 mm、10 mm厚含油污水样品光学腔在300~900 nm波长范围内的透射光谱,通过MC(Monte-Carlo)法和区间逼近法反演出含油污水样品光学常数,进而计算得到了含油污水的吸收光谱.结果表明:含油污水光谱特性明显,且在波长380 nm处存在吸收峰,其多数波长下的折射率约为1.2,而吸收指数在5×10-7~2.5×10-6之间.

Study on Spectral Characteristics of Oil-polluted Water

The oil-polluted water is a great threat for the good water environment, and the oil content will directly affect the pollution situation. Optical measurement is an important method to measure its oil content, and the optical constant is the basis of its measurement. The transmission spectrum of optical cavity between 300~900 nm wavelength range were measured by using the TU-19 double beam UV VIS spectrophotometer, which thickness of oily waste water sample are 2 mm and 10 mm. The optical constants of oil-polluted water samples were inverted by MC( Monte-Carlo) method and interval approximation method. The re-sult shows that the spectral characteristics of oil-polluted water sample are obvious. At the most wavelengths, its refractive index is about 1. 2 and the absorption index is between 5 × 10 -7 ~2. 5 × 10 -6 .