Determination of Hg and MeHg complexation with dissolved organic matter by fluorescence quenching titration

2006 ◽  
Vol 25 (S1) ◽  
pp. 264-265
Author(s):  
Pingqing Fu ◽  
Fengchang Wu ◽  
Feiyue Wang
Keyword(s):  
Organic Matter ◽  
Fluorescence Quenching ◽  
Dissolved Organic Matter ◽  
Fluorescence Quenching Titration

scholarly journals Effect of Composting on Dissolved Organic Matter in Animal Manure and Its Binding with Cu

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Fengsong Zhang ◽  
Yanxia Li ◽  
Xiong Xiong ◽  
Ming Yang ◽  
Wei Li
Keyword(s):  
Organic Matter ◽  
Fluorescence Quenching ◽  
Dissolved Organic Matter ◽  
Animal Manure ◽  
Binding Ability ◽  
Excitation Emission Matrix ◽  
Complexing Capacity ◽  
Agricultural Application ◽  
Fluorescence Quenching Titration ◽  
Cu Ions

The agricultural application of raw animal manure introduces large amounts of dissolved organic matter (DOM) into soil and would increase transport of heavy metals such as Cu which are widely present in animal manure. The purpose of this research was to evaluate the evolution of DOM from pig and cattle manures during composting through excitation-emission matrix (EEM) fluorescence spectroscopy and the binding ability of DOM toward copper (Cu) ions with the aid of fluorescence quenching titration. The excitation-emission matrix spectra indicated that tyrosine-like, tryptophan-like, and soluble microbial byproduct-like fluorescence decreased significantly, while humic-like and fulvic-like fluorescence increased and became the main peaks in composted manure DOM. Fluorescence quenching titration showed that the complexing capacities of pig and cattle manure DOM decreased after composting. Correlation analysis confirmed that complexing capacity of DOM positively and significantly correlates with tyrosine-like and soluble microbial byproduct-like materials which mostly degraded after composting. These results would suggest that the ability of manure DOM to complex with Cu is inhibited as a result of reduced protein-like materials after composting.

scholarly journals Determination of the freshwater origin of Coastal Oyashio Water using humic-like fluorescence in dissolved organic matter

2018 ◽  
Vol 74 (5) ◽  
pp. 509-521 ◽  
Author(s):  
Yu Mizuno ◽  
Jun Nishioka ◽  
Takahiro Tanaka ◽  
Yuya Tada ◽  
Koji Suzuki ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Oyashio Water ◽  
Coastal Oyashio Water

Determination of the Mercury Complexation Characteristics of Dissolved Organic Matter in Natural Waters with “Reducible Hg” Titrations

2003 ◽  
Vol 37 (15) ◽  
pp. 3316-3322 ◽  
Author(s):  
Carl H. Lamborg ◽  
Chun-Mao Tseng ◽  
William F. Fitzgerald ◽  
Prentiss H. Balcom ◽  
Chad R. Hammerschmidt
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Natural Waters
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