scholarly journals Characterization of Humic Acid and its Size Fractions Following Adsorption onto Anion-Doped TiO2 Specimens by Fluorescence Spectroscopic Studies

2016 ◽  
Author(s):  
Perihan Akan ◽  
Nazmiye Cemre Birben ◽  
Miray Bekbolet
Keyword(s):  
Humic Acid ◽  
Spectroscopic Studies ◽  
Size Fractions ◽  
Doped Tio2

Characterization of humic acid size fractions by SEC and MALS

1999 ◽  
Vol 30 (4) ◽  
pp. 229-235 ◽  
Author(s):  
Ray von Wandruszka ◽  
Martin Schimpf ◽  
Michael Hill ◽  
Regginal Engebretson
Keyword(s):  
Humic Acid ◽  
Size Fractions

256. Characterization of Particulate Size Fractions in Small-Size Machine Shops

1999 ◽  
Author(s):  
W.K. Sieber ◽  
G.M. Piacitelli ◽  
R.T. Hughes ◽  
R.A. Glaser ◽  
J.D. Catalano ◽  
...  
Keyword(s):  
Size Fractions ◽  
Machine Shops ◽  
Particulate Size

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.

Green Synthesis and Spectroscopic Studies of Ag-rGO Nanocomposites for Highly Selective Mercury (II) Sensing

2018 ◽  
Vol 9 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Shubhangi J. Mane-Gavade ◽  
Sandip R. Sabale ◽  
Xiao-Ying Yu ◽  
Gurunath H. Nikam ◽  
Bhaskar V. Tamhankar
Keyword(s):  
Green Synthesis ◽  
Color Change ◽  
Limit Of Detection ◽  
Aqueous Media ◽  
Suitable Condition ◽  
Cost Effective ◽  
Spectroscopic Studies ◽  
Calibration Plot ◽  
First Time

Introduction: Herein we report the green synthesis and characterization of silverreduced graphene oxide nanocomposites (Ag-rGO) using Acacia nilotica gum for the first time. Experimental: We demonstrate the Hg2+ ions sensing ability of the Ag-rGO nanocomposites form aqueous medium. The developed colorimetric sensor method is simple, fast and selective for the detection of Hg2+ ions in aqueous media in presence of other associated ions. A significant color change was noticed with naked eye upon Hg2+ addition. The color change was not observed for cations including Sr2+, Ni2+, Cd2+, Pb2+, Mg2+, Ca2+, Fe2+, Ba2+ and Mn2+indicating that only Hg2+ shows a strong interaction with Ag-rGO nanocomposites. Under the most suitable condition, the calibration plot (A0-A) against concentration of Hg2+ was linear in the range of 0.1-1.0 ppm with a correlation coefficient (R2) value 0.9998. Results & Conclusion The concentration of Hg2+ was quantitatively determined with the Limit of Detection (LOD) of 0.85 ppm. Also, this method shows excellent selectivity towards Hg2+ over nine other cations tested. Moreover, the method offers a new cost effective, rapid and simple approach for the detection of Hg2+ in water samples.

Tanning process promotes abiotic humification: separation and characterization of humic acid-like polymers complex

2020 ◽  
Vol 27 (33) ◽  
pp. 41437-41445
Author(s):  
Chao Zhu ◽  
Huiqin Wang ◽  
Hongrui Ma ◽  
Yonglin Yang ◽  
Fan Li
Keyword(s):  
Humic Acid ◽  
Tanning Process
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