LASER INDUCED FLUORESCENCE EFFICIENCY IN WATER QUALITY ASSESSMENT

摘要

Fluorescence data obtained by laser excitation at 266 nm were used for the first time to determine fluorescence properties of household and chicken farm discharges. Two fluorescence indices were applied: a modified humification index (HIX) and a new one, as tyrosine:tryptophan ratio (Tyr/Trp). HIX described very well the degree of contamination of the water system, while Tyr/Trp was useful in discriminating between the types of contaminants-household or chicken farms discharges. Results suggest that chicken farm wastes pollution could leave a specific fluorescence signature, when found in rivers, making possible their identification from the background fluorescence of the river waters.