Advances in the physicochemical characterization of - download pdf or read online

By Fernando Rosario-Ortiz

ISBN-10: 0841229481

ISBN-13: 9780841229488

ISBN-10: 0841229511

ISBN-13: 9780841229518

The examine of dissolved natural topic (DOM) has involved scientists and engineers for no less than 60 years - from the preliminary efforts curious about measuring the concentrations of carbon in marine and aquatic structures, to the invention of the position of DOM within the formation of disinfection byproducts, all of the technique to the recent emphasis at the targeted knowing of the several sensible teams and easy structural beneficial properties that are the foundation for the physicochemical houses of the fabric. After 50 years of labor within the region, there are nonetheless many questions concerning DOM.
The research of dissolved natural subject (DOM) has interested researchers in numerous fields of technology and engineering for plenty of a long time. The effect that DOM has on a wide range of environmental approaches has led to the advance of a multidisciplinary neighborhood of researchers all concentrating on utilizing various analytical recommendations and experimental layout to raised comprehend DOM. This publication deals opt for case stories targeting the complex characterization of DOM in numerous environments and with recognize to various procedures. It effects from the belief of a symposium that E. M. Thurman and that i had prepared for the 245th assembly of the yankee Chemical Society, which was once hung on April 7-11, 2013 in New Orleans, Louisiana

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Using a 3component PARAFAC model, the authors were able to determine that sediments were contributing substantially to the DOM pool in the hypolimnion due to greater abundance of humic-like fluorescence. The authors also hypothesized that photo39 vances in the Physicochemical Characterization of Dissolved Organic Matter: Impact on Natural and Engineered Systems; Rosario-Orti ACS Symposium Series; American Chemical Society: Washington, DC, 2014. ch003 degradation could play a role, with photo-bleaching processes leading to the lower scores for humic-like PARAFAC components in the epilimnion.

The protein-like component had the highest relative abundance at the surface and based on field flow fractionation data was predominantly present in the larger sized fraction of DOM. These findings suggest that drinking water treatment facilities may be able to use DOM characterization techniques, such as EEM-PARAFAC, to understand their source water characteristics in order to control disinfection byproduct (DBP) formation by choosing a different mixture of source waters or locating their intake at a different depth based on DOM quality.

A blue-shifted, microbial humic-like component was reported to correlate with chlorophyll a concentration and was also more abundant in the eutrophic lakes relative to the mesotrophic or oligotrophic lakes. 9 % of the total fluorescence) with very little humic-like fluorescence at all. In large lakes, wastewater influence was reported to play a role in DOM characteristics (68). The ratio of C5 to C1 (N/A peak ratio) was used as a tracer for wastewater impacts. The highest autochthonous production of DOM was reported for lakes with the highest nutrient concentrations, and was potentially due to bacterial production rather than primary production.

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Advances in the physicochemical characterization of dissolved organic matter : impact on natural and engineered systems by Fernando Rosario-Ortiz

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