New insights to MIEX treatment: Fluorescence spectra across natural, synthetic, and waste waters
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New insights to MIEX treatment: Fluorescence spectra across synthetic, natural and waste waters Pedro Palomino & Treavor H. Boyer Department of Environmental Engineering Sciences University of Florida Gainesville, FL 1
New insights to MIEX treatment: Fluorescence spectra across natural, synthetic, and waste waters
1. New insights to MIEX treatment: Fluorescence spectra across
synthetic, natural and waste waters
Pedro Palomino & Treavor H. Boyer
Department of Environmental Engineering Sciences
University of Florida Gainesville, FL
1
2. Natural Organic Matter
Formation
Degradation of Terrestrial and Microbial matter
3. Large, complex and not fully understood
Problems
Formation of Disinfection by-Products
4. Membrane fouling
5. Increased chemical requirements
Natural Organic Matter
vanLoon and Duffy, Environmental Chemistry
Treatment options
10. MIEX Monitoring
4
Completely Mixed Flow Reactor
Current methods
DOC - Expensive and less reliable
11. UV - Simple and reliable, but small data set
Raw
Treated
DOC
DOC
UV
UV
Could fluorescence be used as an alternative for both
measurements?
12. Goals and Objectives
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Compare the impact of MIEX treatment on the fluorescence spectra
across Surface, Ground, Synthetic & Waste waters?
Understand the shift in fluorescence peak location
Compare dissolved organic carbon (DOC) to fluorescence
intensity
Compare specific ultraviolet absorbance (SUVA) to fluorescence
index (FI)
13. Sampling
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2 surface waters
10 30 mg-C/L
1 groundwater
5 6 mg-C/L
4 synthetic waters
4 6 mg-C/L
14. Isolates of NOM
5 leachates
300 1300 mg-C/L
Savannah
St. Marys River
Putnam
Landfill
New River Landfill
Santa Fe River
St. Johns River
Alachua SW Landfill
Cedar Key Ground Water
Sanford Ave. Canal
Polk Landfill
Wikimapia.com
15. Experiments
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16. Analysis
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DOC and UV
SUVA = UV/DOC
Fluorescence Spectrophotometer
Excitation: 220 - 500 nm
17. Emission: 220 - 600 nm
MatLab
In-house Program: DI subtraction, normalize by raman &
FI
18. FI = Intensity at EM470/EM520 @ EX370
19. No inner filter correction & cut out Rayleigh
lines