碱厂废水光谱特性实验研究

Experimental Study on the Spectral Characteristics of Wastewater from Alkaline Factory

该文报道碱厂废水随浓度变化的光谱实验。分析碱厂废水的光谱特征 ,并与相同浓度的海水悬浮泥沙水体的光谱进行比较 ;确定该废水特征波长为 50 1.3nm。根据光谱实验结果 ,结合当前已有的水色传感器的资料 ,选择两个卫星传感器波段 :Sea WIFS第四频道 (497.2～ 52 1.6 nm)和TM第二频道 (518.9～ 6 0 0 .2 nm) ;利用数字对 (R,c) ,建立了反射率与该污染水体浓度间的相关模式。为遥感技术大面积、快速地监测碱厂废水污染水体提供理论依据。

A simulation experiment on the spectra of wastewater from alkaline factory is described. The characteristic central wavelength of the wastewater is determined to be 501.3nm through comparing with the spectra of suspended particles in water. Two channels to match the experimental results are chosen separately from 2 satellite ocean color sensors, i. e., the 4th channel (497.2～521.6nm) on SeaWIFS and the 2nd channel (518.9～600.2nm) on TM. The simulation modals between the concentration and the reflective radiance of this contamination wastewater have been derived by using data pairs (R, c), where R is the average of the values measured by VF921-256 spectrometer in the chosen optimum band. Hence a sound foundation is provided for rapid and large area monitoring of alkaline factory wastewater.