Fig 5 – EEM contour and surface plots for 5 raw water samples

Fluorescence spectroscopy is a common method of analyzing the characteristics of natural organic matter (NOM) (see Fig. 1) in water samples. NOM is a major concern of surface withdrawing water plants due to the formation of disinfection

Drive Excitation – Emission Spectra Impact

Sampling and Analyzing

With groundwater resources decreasing, surface water will become a necessary source for many drinking water utilities. This technology can improve the characterization and thus removal processes of NOM.

NOM mobilizes metals, pesticides and pharmaceuticals through water ways. NOM prevent light penetration in water bodies.

Pedro A. Palomino and Treavor H. BoyerUniversity of Florida, Department of Environmental Engineering Sciences

New insights to MIEX treatment: Fluorescence spectra across synthetic, natural and waste waters

UG 6

Fig. 1 – Structure of NOM

Looking Forward

Raw

Fig. 3 – Sampling Map

Fig 4 – Fluorescence Analyses

Samples were collected between 2/09 and 1/10 from landfills, surface water bodies and groundwater aquifer (see Fig. 3). They were analyzed on a F-2500 Fluorescence Spectrophotometer (see Fig. 4)

Lake Jesup

Emission (nm) Excitation (nm) Intensity (nm) Fluorescence Index DOC (mg C/L) SUVA (nm*L/mg C) St. Mary's River Isolate 450 260 0.661 1.575 5.700 5.403 Santa Fe River Isolate 450 265 0.754 1.750 4.199 5.335 Cedar Key GW 445 265 1.549 2.235 5.832 2.949 St. John's River 450 270 1.770 1.979 18.281 4.059 Lake Jesup 455 270 2.597 1.979 18.300 4.453 Polk Landfill 410 245 1.025 2.699 454.650 1.936 Alachua SW Landfill 410 245 1.373 2.964 517.550 1.797 Putnam Landfill 455 260 1.170 1.734 624.250 7.369 New River Landfill 445 244 2.800 2.188 1332.000 3.153

Polk Landfill

Cedar Key Groundwater

Polk Landfill

Putnam LandfillSanta Fe River

Table 1 - EM/EX Fulvic Acid max peak locations and intensities for all sources waters. Note: Polk and Alachua Landfills also exhibited a peak in the Tyrosine region with EM: 340 nm, EX: 225 nm and Intensity: 1.032 nm and 1.482 nm, respectively.

Treated

Fig 6 – Raw sample of St. Johns River and a treated sample with a 10 mL/L Miex-Cl dose

EES Poster Symposium, March 27, 2010

Fig 2 – Location of EEM peaks based on literature reports

by-products. Still, due to the complexity of NOM, the data produced by fluorescence spectroscopy, such as excitation-emission matrices (EEMs), are not fully understood. The goal of this work is to better characterize NOM. The specific objectives are to understand (1) the difference in EEMs across different sources and DOC values and (2)