Utilization of medical stone to improve the composition and quality of dissolved organic matter in composted pig manure

2018 ◽  
Vol 197 ◽  
pp. 472-478 ◽  
Author(s):  
Quan Wang ◽  
Mukesh Kumar Awasthi ◽  
Junchao Zhao ◽  
Xiuna Ren ◽  
Meijing Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Pig Manure

Transport and transformation of dissolved organic matter in the Neuse River estuarine system, NC, USA, following Hurricane Irene (2011)

2016 ◽  
Vol 67 (9) ◽  
pp. 1313 ◽  
Author(s):  
Richard L. Miller ◽  
Matthew M. Brown ◽  
Ryan P. Mulligan
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Estuarine System ◽  
Spectral Parameters ◽  
Visible Absorption ◽  
Neuse River ◽  
Hurricane Irene ◽  
Rain Events ◽  
River Estuarine

Rivers are major conduits for the transport of allochthonous dissolved organic matter (DOM) to the ocean in coupled land–coastal systems. DOM can regulate biogeochemical processes and affect water quality, depending on the concentration and quality of DOM. By using spectral parameters calculated from chromophoric dissolved organic matter (CDOM) ultraviolet-visible absorption spectra, along with dissolved organic carbon (DOC) concentrations, we examined the input and change in the amount and quality of DOM in surface waters of the lower Neuse River and upper–middle regions of the Neuse Estuary following a major rainfall (30cm in 1 day) associated with Hurricane Irene (2011). CDOM and DOC nearly tripled in the 3 days following the storm. Although a strong linear relationship was observed between DOC and CDOM absorption coefficient at 350nm (R2=0.85), a higher fraction of non-chromophoric DOC to CDOM was observed during the rising river discharge. The spectral slope at 275–295nm and the slope ratio (275–295:350–400nm) indicated a shift from higher to lower molecular-weight DOM as it transited through the estuary, probably as a result of photodegradation. The present study demonstrated the utility of using CDOM spectral parameters for examining the flux and transformation of DOM in coastal waters following major rain events.

Temporal dynamics of dissolved combined neutral sugars and the quality of dissolved organic matter in the Northwestern Sargasso Sea

2009 ◽  
Vol 56 (5) ◽  
pp. 672-685 ◽  
Author(s):  
Stuart J. Goldberg ◽  
Craig A. Carlson ◽  
Dennis A. Hansell ◽  
Norm B. Nelson ◽  
David A. Siegel
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Temporal Dynamics ◽  
Sargasso Sea ◽  
Neutral Sugars

The quantity and quality of dissolved organic matter as supplementary carbon source impacts the pesticide-degrading activity of a triple-species bacterial biofilm

2013 ◽  
Vol 98 (2) ◽  
pp. 931-943 ◽  
Author(s):  
Benjamin Horemans ◽  
Johanna Vandermaesen ◽  
Philip Breugelmans ◽  
Johan Hofkens ◽  
Erik Smolders ◽  
...  
Keyword(s):  
Organic Matter ◽  
Carbon Source ◽  
Dissolved Organic Matter ◽  
Bacterial Biofilm

scholarly journals PRE AND POST-MONSOON QUALITY OF DISSOLVED ORGANIC MATTER IN HIGH ARSENIC SITES IN WEST BENGAL, INDIA

2016 ◽  
Author(s):  
Harshad Kulkarni ◽  
◽  
Natalie Mladenov ◽  
Debashis Chatterjee ◽  
Saugata Datta
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
West Bengal ◽  
Post Monsoon ◽  
High Arsenic

scholarly journals Effect of UV and Visible Radiation on Optical Properties of Chromophoric Dissolved Organic Matter Released by Emiliania huxleyi

2020 ◽  
Vol 8 (11) ◽  
pp. 888
Author(s):  
Simona Retelletti Brogi ◽  
Bruno Charrière ◽  
Margherita Gonnelli ◽  
Frédéric Vaultier ◽  
Richard Sempéré ◽  
...  
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Linear Trend ◽  
Euphotic Zone ◽  
Emiliania Huxleyi ◽  
Visible Radiation ◽  
Irradiation Energy ◽  
Before And After

Photodegradation is a natural process that strongly affects the chromophoric fraction of dissolved organic matter (DOM), especially in surface water of the oceans. In the euphotic zone, the concentration and quality of DOM are mostly dependent on primary production by phytoplankton. The effect of photodegradation on algal DOM has not been investigated as much as on terrestrial DOM. In this study, we explored the effect of different spectral regions (i.e., full sun spectrum, visible light, 295–800 nm, 305–800 nm, and 320–800 nm) on algal exudates by Emiliania huxleyi, a ubiquitous coccolithophore. The optical properties (absorption and fluorescence) of algal DOM were investigated before and after irradiation with the different spectral regions. The absorption and fluorescence spectra were compared before and after irradiation. The results showed an increase in the effect of photobleaching with increasing irradiation energy for all of the absorbance indices. Similarly, the protein-like fluorescence decreased at increasing irradiation energy. The humic-like fluorescence, which was the most affected, did not show a linear trend between photobleaching and irradiation energy, which suggested that irradiation mainly determined a change in these molecules’ quantum yield.

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