三次元励起・蛍光スペクトルを用いた溶存有機物のキャラクタリゼーション

抄録

Various samples from lakes, rivers, secondary effluents and renovated water following coagulation-sedimentation treatment were characterized by fluorescence spectroscopy using excitaion-emission matrix. Our results suggest that dissolved organic matter can be categorized into three distinct groups. Groupl is distinguished by a fulvic acid-type fluorescence (excitation about 270nm and emission about 435nm). Fulvic acid-type substances concentration can be calculated using this relative fluorescence intensity. Group 2 is distinguished by a protein-type fluorescence (excitation about 280nm and emission about 340nm). This substance consisted of protein from secondary effluent and that released by algae. Group 3 is distinguished by a fluorescence caused by organic matter in secondary effluent (excitation about 495nm and emission about 515nm). This substance was hydrophobic and not biodegradable. The relative fluorescence intensity in excitation 495nm and emission 515nm may be an indicator of the influence of secondary effluent.