Characterization of organic matter in natural waters by EEM fluorescence properties

2015 ◽  
Vol 57 (6) ◽  
pp. 2428-2436 ◽  
Author(s):  
Sibel Sen-Kavurmaci ◽  
Nazmiye Cemre Birben ◽  
Ayşe Tomruk ◽  
Miray Bekbolet
Keyword(s):  
Organic Matter ◽  
Natural Waters ◽  
Fluorescence Properties ◽  
Eem Fluorescence

scholarly journals Spectral Characterization of Fungal Metabolites in Aqueous Medium with Humus Substances

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
D. A. Khundzhua ◽  
S. V. Patsaeva ◽  
V. A. Terekhova ◽  
V. I. Yuzhakov
Keyword(s):  
Organic Matter ◽  
Natural Waters ◽  
Culture Medium ◽  
Molecular Size ◽  
Aquatic Environments ◽  
Fungal Metabolites ◽  
Microscopic Fungi ◽  
Spectral Measurements ◽  
Humus Substances

The work is targeted to confirm participation of microscopic fungi in transformation of humus substances in aquatic environments. The research is focused on the spectroscopic study of the collection of fungal strains with different pigmentation of mycelium. Spectral properties of fungal metabolites were measured and compared to that of natural aquatic nonliving organic matter and commercial humus substances in aqueous solutions. The experiments revealed that the effect of microscopic fungi growing in the culture medium with added humate appeared as changes in the humic-type fluorescence: its characteristics became more similar to that of nonliving organic matter in natural waters than to original humate preparation. The experiments demonstrated degradation of coal-originated humate due to microbial activity into compounds of smaller molecular size and increased heterogeneity. We resume that transformation of humus substances by fungal cultures can be monitored and characterized using spectral measurements.

scholarly journals Electrospray and photoionization mass spectrometry for the characterization of organic matter in natural waters: a qualitative assessment

2009 ◽  
Vol 7 (1) ◽  
pp. 81-95 ◽  
Author(s):  
William C. Hockaday ◽  
Jeremiah M. Purcell ◽  
Alan G. Marshall ◽  
Jeffery A. Baldock ◽  
Patrick G. Hatcher
Keyword(s):  
Mass Spectrometry ◽  
Organic Matter ◽  
Natural Waters ◽  
Qualitative Assessment ◽  
Photoionization Mass Spectrometry

scholarly journals Characterization of Humic Acids from Raised Bog Peat

2014 ◽  
Vol 52 (1-2) ◽  
pp. 83-97 ◽  
Author(s):  
M. Klavins ◽  
O. Purmalis
Keyword(s):  
Organic Matter ◽  
Humic Acids ◽  
Natural Waters ◽  
Transformation Process ◽  
Hydroxyl Groups ◽  
Source Depth ◽  
Raised Bog ◽  
Phenolic Hydroxyl Groups ◽  
Coal Organic Matter

Abstract Humic substances form most of the organic component of soil, peat and natural waters, but their structure and properties are very much dependent on the source. The aim of this study was to characterize humic acids from raised bog peat to evaluate the homogeneity of humic acids isolated from the bog bodies and to study peat humification impact on the properties of humic acids. Peat humic acids (HA) have an intermediate position between the living organic matter and coal organic matter, with their structure formed in a process where the relatively labile moieties (carbohydrates, amino acids, etc.) are destroyed, and thermodynamically more stable aromatic and polycyclic structures emerge. Comparatively, the studied peat HAs were at the start of this transformation process. Concentrations of carboxyl and phenolic hydroxyl groups changed depending on the source depth of peat from which HAs were isolated. The carboxylic acidity of peat HAs increased with depth of the source and the extent of peat humification

Characterization of organic matter from natural waters using tetramethylammonium hydroxide thermochemolysis GC-MS

2003 ◽  
Vol 70 (1) ◽  
pp. 99-128 ◽  
Author(s):  
Scott W Frazier ◽  
Kirk O Nowack ◽  
Kenya M Goins ◽  
Fred S Cannon ◽  
Louis A Kaplan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Waters ◽  
Tetramethylammonium Hydroxide

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

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
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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