scholarly journals The dissociation kinetics of Cu-dissolved organic matter complexes from soil and soil amendments

2010 ◽  
Vol 670 (1-2) ◽  
pp. 24-32 ◽  
Author(s):  
F. Amery ◽  
F. Degryse ◽  
C. Van Moorleghem ◽  
M. Duyck ◽  
E. Smolders
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Soil Amendments ◽  
Dissociation Kinetics ◽  
Kinetics Of

Influence of dissolved organic matter on the photodegradation and volatilization kinetics of chlorpyrifos in coastal waters

2015 ◽  
Vol 310 ◽  
pp. 189-196 ◽  
Author(s):  
M.I. Pinto ◽  
R. Salgado ◽  
Barbara A. Cottrell ◽  
William J. Cooper ◽  
Hugh D. Burrows ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Coastal Waters ◽  
Kinetics Of

Using diffusive gradients in thin films to probe the kinetics of metal interaction with algal exudates

2011 ◽  
Vol 8 (5) ◽  
pp. 517 ◽  
Author(s):  
Jacqueline Levy ◽  
Hao Zhang ◽  
William Davison ◽  
Rene Groben
Keyword(s):  
Thin Films ◽  
Organic Matter ◽  
Organic Carbon ◽  
Dissolved Organic Matter ◽  
Chlorella Vulgaris ◽  
Metal Speciation ◽  
The Relationship ◽  
Diffusive Gradients ◽  
Kinetics Of

Environmental context Interaction of metals with dissolved organic matter is one of the key processes defining metal bioavailability in water. The technique of diffusive gradients in thin films was used to investigate the kinetics of the interaction between metals and dissolved organic matter released by algae. For most metals the rate at which they were released from the organic matter was fast, but release of iron was kinetically limited. AbstractThe interaction of metals with organic matter is one of the key processes determining metal speciation and bioavailability in water. Fulvic acid tends to dominate dissolved organic carbon (DOC) in freshwaters, but organic carbon produced in situ, e.g. exudates released by algae and bacteria, is also significant. The technique of diffusive gradients in thin films (DGT) was used to investigate the lability of metal–exudate complexes using a kinetic signature approach. Exudates were harvested from three cultured freshwater alga (Chlorella vulgaris, Cryptomonas pyrenoidifera, Anabaena flos-aquae) and the filtered media supplemented with trace metals. DGT-labile metal concentrations and kinetic signatures were determined (24-h deployment). The relationship between Fe and DOC was a defining feature of the kinetic signatures. Iron was the most kinetically limited metal followed by Al and Cu, whereas Co, Ni and Pb were effectively completely labile. Exudates from Chlorella vulgaris produced the most DOC and the most marked kinetic limitation.

Kinetics of Desorption of Organic Compounds from Dissolved Organic Matter

2011 ◽  
Vol 45 (23) ◽  
pp. 10013-10019 ◽  
Author(s):  
Frank-Dieter Kopinke ◽  
Ksenia Ramus ◽  
Juergen Poerschmann ◽  
Anett Georgi
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Organic Compounds ◽  
Kinetics Of

Extraction kinetics of solid phase extraction of dissolved organic matter in environmental samples from various aquatic system

2020 ◽  
Author(s):  
Yun-Hsuan Ho ◽  
Jie Yinn Lee ◽  
Chia-Ying Chuang
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Open Ocean ◽  
Phase Extraction ◽  
Extraction Kinetics ◽  
Deep Ocean Water ◽  
Kinetics Of ◽  
Extraction Selectivity

<p>Progress has been made towards optimizing extracting dissolved organic matter (DOM) using a styrene-divinylbenzene copolymer (PPL) sorbent, which is a widely used solid phase extraction (SPE) method to separate DOM from different aquatic samples. To establish the suitable extraction conditions, the effects of critical SPE variables such as loading mass, concentration, flow rate, as well as the extraction selectivity of the PPL sorbent have been systematically studied. Tens liters of water samples were collected from various aquatic environments, including headwater, downstream river water, coastal seawater, surface seawater from open ocean, seawater from open ocean at the depth of fluorescence maximum, and deep ocean water. 5g-Bond Elut PPL columns were used and the extraction kinetics of DOM were monitored liter-by-liter while extraction. Fluorescence spectrum were decomposed into their underlying chemical components resolved by PARAllel FACtor analysis (PARAFAC). Extraction selectivity of the PPL sorbent among different types of waters was verified through those fluorescence excitation emission matrices (EEMs) and chromophoric dissolved organic matter (CDOM) measurements.</p>

scholarly journals The removal kinetics of dissolved organic matter and the optical clarity of groundwater

2016 ◽  
Vol 24 (6) ◽  
pp. 1413-1422 ◽  
Author(s):  
Francis H. Chapelle ◽  
Yuan Shen ◽  
Eric W. Strom ◽  
Ronald Benner
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Kinetics Of
Sign in / Sign up

Export Citation Format

Share Document