Fluorescence spectroscopy as a means of distinguishing fulvic and humic acids from dissolved and sedimentary aquatic sources and terrestrial sources

2005 ◽  
pp. 63-73 ◽  
Author(s):  
Nicola Senesi ◽  
Teodoro M. Miano ◽  
Maria Rosaria Provenzano
Keyword(s):  
Fluorescence Spectroscopy ◽  
Humic Acids

scholarly journals Characterization of humic acids from a Brazilian Oxisol under different tillage systems by EPR, 13C NMR, FTIR and fluorescence spectroscopy

Geoderma ◽  
2004 ◽  
Vol 118 (3-4) ◽  
pp. 181-190 ◽  
Author(s):  
Martha González Pérez ◽  
Ladislau Martin-Neto ◽  
Sérgio C Saab ◽  
Etelvino H Novotny ◽  
Débora M.B.P Milori ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Humic Acids ◽  
13C Nmr ◽  
Tillage Systems

Detection of Copper(II) and zinc(II) binding to humic acids from pig slurry and amended soils by fluorescence spectroscopy

2006 ◽  
Vol 143 (2) ◽  
pp. 212-220 ◽  
Author(s):  
Diana Hernández ◽  
César Plaza ◽  
Nicola Senesi ◽  
Alfredo Polo
Keyword(s):  
Fluorescence Spectroscopy ◽  
Humic Acids ◽  
Pig Slurry ◽  
Amended Soils

scholarly journals EQUILIBRIUM STUDIES OF THE INTERACTIONS OF Zn(II) AND Cu(U) IONS WITH HUMIC ACID BY POTENTIOMETRIC TITRATION, IR AND FLUORESCENCE SPECTROSCOPY

2008 ◽  
Vol 16 (16) ◽  
pp. 1-10
Author(s):  
T.G. Costa ◽  
F. S. Miranda ◽  
M. Martini ◽  
M. R. Silva ◽  
B. P. Szpoganicz ◽  
...  
Keyword(s):  
Humic Acid ◽  
Fluorescence Spectroscopy ◽  
Potentiometric Titration ◽  
Humic Acids ◽  
Equilibrium Constants ◽  
Equilibrium Studies

The interactions of Zn(II) and Cu(II) with humic acids (HA) were characterized by potentiometric titration, IR and fluorescence spectroscopy. The equilibrium constants determined were Log([Zn(Cat)]/[Zn+2][Cat]) = 15.25, Log([Zn(Cat),]/[ZnCat][Cat]) = 9.80, Log([Zn(Cat)(Sal)]/[Zn(Cat)][Sal]) = 8.59, Log([Zn(Cat)(Pht)]/[Zn(Cat)][Pht]) = 3.71, Log([Zn(OH)(Cat)2][H+]/[Zn(Cat),]) = -8.91, for the Zn(II) system, and Log([Cu(Cat)]/[Cu][Cat]) = 18.45, Log([Cu(Cat)2]l[CuCat][Cat]) = 14.18, and Log([Cu(Cat)(Sal)]/[Cu(Cat)][Sal]) = 8.44 for the Cu(Il) system The amounts of each group detected by potentiometric titration were: phenol = 0.666, carboxylic = 1.042, catechol = 0.540, phtalic = 1.163, and Salicylic= 0.810 mrnoles per gram of HA, and the speciation curves were calculated.

Characterization of humic acids by two-dimensional correlation fluorescence spectroscopy

2008 ◽  
Vol 883-884 ◽  
pp. 155-159 ◽  
Author(s):  
K. Nakashima ◽  
Shaoyong Xing ◽  
Yongkuan Gong ◽  
Toru Miyajima
Keyword(s):  
Fluorescence Spectroscopy ◽  
Humic Acids ◽  
Two Dimensional

HUMIFICATION DEGREE OF SOIL HUMIC ACIDS DETERMINED BY FLUORESCENCE SPECTROSCOPY

Soil Science ◽  
2002 ◽  
Vol 167 (11) ◽  
pp. 739-749 ◽  
Author(s):  
Débora M. B. P. Milori ◽  
Ladislau Martin-Neto ◽  
Cimélio Bayer ◽  
João Mielniczuk ◽  
Vanderlei S. Bagnato
Keyword(s):  
Fluorescence Spectroscopy ◽  
Humic Acids ◽  
Humification Degree ◽  
Soil Humic Acids

Fluorescence Excitation-Emission Spectroscopy for Characterizing Transformation of Dissolved Organic Matter during Landfill Leachate Treatment by Photocatalysis

2013 ◽  
Vol 726-731 ◽  
pp. 122-126
Author(s):  
Chu Zhou Deng ◽  
Song Liu ◽  
Chen Zhong Jia
Keyword(s):  
Organic Matter ◽  
Fluorescence Spectroscopy ◽  
Dissolved Organic Matter ◽  
Humic Acids ◽  
Emission Spectroscopy ◽  
Treatment Process ◽  
Leachate Treatment ◽  
Fluorescence Excitation ◽  
Most Significant Change ◽  
Composition Changes

Fluorescence spectroscopy was performed to investigate the composition changes and characteristics of the leachate DOM (dissolved organic matter) during UV-TiO2photocatalytic treatment process. The results showed that fulvic-like, tryptophan-like and humic acids-like matters were the main compounds in leachate. During photocatalytic treatment process, fluorescence spectroscopy of DOM changed considerably. The final products were mainly fulvic-like and tryptophan-like matters. In general, the fluorescence signals of humic acids-like matters had the most significant change, which disappeared entirely after 60 h treatment, implying that humic acids-like matters can be degraded preferentially by photocatalysis. The other notable change was in VIS fulvic-like matters region, which suggested that fulvic-like matters can be significantly degraded. In 72 h photocatalytic effluent, VIS fulvic-like, tryptophan-like and tyrosine-like matters were remained, and the last two matters were the dominant fractions. These results indicated that fulvic-like and humic acids-like matters with macromolecular can be degraded into protein-like matters with micro-molecular by photocatalysis.

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