Characterization of the Polarity of Natural Organic Matter under Ambient Conditions by the Polarity Rapid Assessment Method (PRAM)

Dissolved organic matter (DOM) is a mixture of compounds that are found ubiquitously in natural waters. The characterization of DOM is important in order to understand its effect on environmental processes and during treatment systems. Of all the properties usually measured with relation to DOM, the polarity is of critical importance since it will directly influence different processes. Recently, a new method has been developed for the characterization of DOM under ambient conditions, called the Polar Rapid Assessment Method (PRAM). The PRAM allows characterization and temporal and spatial comparisons under environmentally relevant conditions of pH and ionic strength. This study first modifies the PRAM method to 3 probes for high sample throughput by using a subset of the SPE sorbents to interpret DOM polarity by DOC and UV detection. Then the modified PRAM is compared to the XAD resin polarity method and finds a similarity in hydrophobic assessment but different results for the hydrophilic DOM. This study then evaluates the use of PRAM as a tool to evaluate water treatment processes and the character of size fractions of DOM. The PRAM is shown to be a very useful tool to evaluate and thus optimize treatment efficiency and removal of DOM.

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Characterization of the changes in polarity of natural organic matter using solid-phase extraction: introducing the NOM polarity rapid assessment method (NOM-PRAM)

Water Science & Technology Water Supply ◽

10.2166/ws.2004.0055 ◽

2004 ◽

Vol 4 (4) ◽

pp. 11-18 ◽

Cited By ~ 3

Author(s):

F.L. Rosario-Ortiz ◽

K. Kozawa ◽

H.N. Al-Samarrai ◽

F.W. Gerringer ◽

C.J. Gabelich ◽

...

Keyword(s):

Organic Matter ◽

Water Treatment ◽

Solid Phase Extraction ◽

Natural Organic Matter ◽

Solid Phase ◽

Rapid Assessment ◽

Assessment Method ◽

Phase Extraction ◽

Rapid Assessment Method ◽

Wide Range

A new technique has been developed to quickly monitor the changes in polarity of aqueous natural organic matter (NOM) using solid-phase extraction (SPE) cartridges. This paper introduces the NOM polarity rapid assessment method (PRAM). The PRAM technique characterizes changes in NOM polarity by monitoring the breakthrough curves from different SPE cartridges at UV254. The SPE cartridges used in this study include a wide range of polarity from non-polar C-18 materials to anion exchangers. Each individual cartridge run takes 10 minutes and requires about 15 ml of sample. The collected water sample matrix is not changed, i.e. all PRAM analyses were done under ambient conditions on the original sample. Polarity evaluation is completed without the sample being exposed to changes in sample conditions, such as pH, solvent extraction, sequential evaporations or freeze-drying. This technique was able to monitor the weekly changes in NOM polarity entering a water treatment plant and compares the effects of different water treatment processes on this material.

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Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

Agrokémia és Talajtan ◽

10.1556/agrokem.59.2010.1.12 ◽

2010 ◽

Vol 59 (1) ◽

pp. 99-108 ◽

Cited By ~ 3

Author(s):

M. Takács ◽

Gy. Füleky

Keyword(s):

Organic Matter ◽

Humic Acid ◽

Natural Organic Matter ◽

Extraction Methods ◽

Soil Samples ◽

Hot Water ◽

Soil Extracts ◽

Water Percolation ◽

Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

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Characterization of natural organic matter (NOM) derived from sewage sludge compost. Part 2: multivariate techniques in the study of compost maturation

Bioresource Technology ◽

10.1016/j.biortech.2004.05.019 ◽

2005 ◽

Vol 96 (4) ◽

pp. 479-484 ◽

Cited By ~ 49

Author(s):

Radosław Zbytniewski ◽

Boguslaw Buszewski

Keyword(s):

Organic Matter ◽

Sewage Sludge ◽

Natural Organic Matter ◽

Multivariate Techniques ◽

Sludge Compost ◽

Sewage Sludge Compost

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Molecular characterization of an end-residue of humeomics applied to a soil humic acid

RSC Advances ◽

10.1039/c4ra01619j ◽

2014 ◽

Vol 4 (45) ◽

pp. 23658-23665 ◽

Cited By ~ 18

Author(s):

A. Nebbioso ◽

A. Piccolo ◽

M. Lamshöft ◽

M. Spiteller

Keyword(s):

Organic Matter ◽

Humic Acid ◽

Molecular Characterization ◽

Natural Organic Matter ◽

Molecular Composition ◽

Chemical Fractionation ◽

Soil Humic Acid

Humeomics encompasses step-wise chemical fractionation and instrumental determination to fully characterize the heterogeneous molecular composition of natural organic matter.

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