关键词: 制浆废水, 化学需氧量, 导数光谱, 化学计量学

Abstract:

In order to simplify the determination of chemical oxygen demand （COD） of pulping effluent using the conventional methods, a high-speed derivative spectrophotometry-chemometrics method is proposed. In this method, based on the mathematical relationship between the multi-wavelength derivative spectral signals and the known COD values of a set of pulping effluent samples, a calibration model is established using a chemometrics software. With this model, the COD value of a certain pulping effluent can be easily predicted according to the multi-wavelength derivative spectral signals. The proposed method provides a new and convenient approach to the high-accuracy COD determination of pulping effluent without using any chemical reagents.

Key words: pulping effluent, chemical oxygen demand, derivative spectrophotometry, chemometrics