Hydroxyl Radical Production by H2O2-Mediated Oxidation of Fe(II) Complexed by Suwannee River Fulvic Acid Under Circumneutral Freshwater Conditions

2012 ◽  
Vol 47 (2) ◽  
pp. 829-835 ◽  
Author(s):  
Christopher J. Miller ◽  
Andrew L. Rose ◽  
T. David Waite
Keyword(s):  
Hydroxyl Radical ◽  
Fulvic Acid ◽  
Radical Production ◽  
Suwannee River ◽  
Suwannee River Fulvic Acid ◽  
Mediated Oxidation

Adsorption of Suwannee River Fulvic Acid on Aluminum Oxyhydroxide Surfaces:  An In Situ ATR-FTIR Study

Langmuir ◽  
2004 ◽  
Vol 20 (14) ◽  
pp. 5655-5658 ◽  
Author(s):  
Tae Hyun Yoon ◽  
Stephen B. Johnson ◽  
Gordon E. Brown
Keyword(s):  
Fulvic Acid ◽  
Ftir Study ◽  
Suwannee River ◽  
Suwannee River Fulvic Acid ◽  
Aluminum Oxyhydroxide

Monitoring advanced oxidation of Suwannee River fulvic acid

2010 ◽  
Vol 7 (3) ◽  
pp. 225 ◽  
Author(s):  
Janey V. Camp ◽  
Dennis B. George ◽  
Martha J. M. Wells ◽  
Pedro E. Arce
Keyword(s):  
Organic Carbon ◽  
Fluorescence Spectroscopy ◽  
Fulvic Acid ◽  
Electrical Discharge ◽  
Fulvic Acids ◽  
Pilot Scale ◽  
Suwannee River ◽  
Suwannee River Fulvic Acid ◽  
Pulsed Electrical Discharge ◽  
By Products

Environmental context.Potentially toxic disinfection by-products form when water containing humic and fulvic acids is chlorinated to destroy pathogenic microorganisms. A pulsed electrical discharge was examined for its ability to destroy an aquatic fulvic acid by oxidation. Spectroscopically, changes in the organic structures were observed, but carbon content and disinfection by-products were not reduced. Abstract.A pilot-scale pulsed electrical discharge (PED) system was used to treat Suwannee River fulvic acid (SRFA) as a representative precursor material for the formation of disinfection by-products (DBPs), specifically trihalomethane compounds. Ultraviolet-visible and fluorescence spectroscopy, dissolved organic carbon (DOC), and the trihalomethane formation potential (THMFP) were used as analytical parameters to monitor the effects of treatment on the substrate. The potential for SRFA degradation (5 mg L–1 DOC) was examined over 60 min at each of four operational configurations, varying pulse energy and frequency (0.15 J and 60 Hz, 0.15 J and 120 Hz, 0.4 J and 60 Hz, and 0.4 J and 120 Hz) in a factorial design. Statistically significant changes occurred for UV254, EX254EM460, and EX328EM460 under selected conditions; however, concomitant changes in DOC and THMFP were not observed. The composition of SRFA changed, but organic carbon was not mineralised to carbon dioxide. In addition to showing degradation by PED, the significance of the preliminary findings of this research was to demonstrate that spectroscopic monitoring of precursor degradation alone can be misleading, and that whereas ultraviolet-visible and fluorescence spectroscopy indicated degradation of precursor compounds, DOC and THMFP measurements were unchanged and did not support the occurrence of mineralisation in this system.

Examination of Cadmium(II) Complexation by the Suwannee River Fulvic Acid Using113Cd NMR Relaxation Measurements

2001 ◽  
Vol 35 (24) ◽  
pp. 4900-4904 ◽  
Author(s):  
William H. Otto ◽  
Sarah D. Burton ◽  
W. Robert Carper ◽  
Cynthia K. Larive
Keyword(s):  
Fulvic Acid ◽  
Nmr Relaxation ◽  
Suwannee River ◽  
Suwannee River Fulvic Acid ◽  
Relaxation Measurements
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