A feasible strategy to improve confident elemental composition determination of compounds in complex organic mixture such as natural organic matter by FTICR-MS without internal calibration

2021 ◽  
Vol 751 ◽  
pp. 142255
Author(s):  
Dong Cao ◽  
Zhineng Hao ◽  
Ming Hu ◽  
Fanglan Geng ◽  
Ziyu Rao ◽  
...  
Keyword(s):  
Organic Matter ◽  
Elemental Composition ◽  
Natural Organic Matter ◽  
Organic Mixture ◽  
Fticr Ms ◽  
Internal Calibration ◽  
Composition Determination ◽  
Complex Organic

Determination of Hydrophobic and Hydrophilic Fractions of Natural Organic Matter in Raw Water of Jalalieh and Tehranspars Water Treatment Plants (Tehran)

2007 ◽  
Vol 7 (18) ◽  
pp. 2651-2655 ◽  
Author(s):  
M.A. Zazouli ◽  
S. Nasseri . ◽  
A.H. Mahvi . ◽  
A.R. Mesdaghinia . ◽  
M. Younecian . ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Raw Water ◽  
Water Treatment Plants

Comparison of disinfection byproduct (DBP) formation from different UV technologies at bench scale

2002 ◽  
Vol 2 (5-6) ◽  
pp. 515-521 ◽  
Author(s):  
W. Liu ◽  
S.A. Andrews ◽  
J.R. Bolton ◽  
K.G. Linden ◽  
C. Sharpless ◽  
...  
Keyword(s):  
Organic Matter ◽  
Carboxylic Acids ◽  
Natural Organic Matter ◽  
Uv Irradiation ◽  
Direct Action ◽  
Disinfection Byproduct ◽  
Pressure Medium ◽  
The Impact ◽  
As Effects

The impact of UV irradiation on disinfection byproduct (DBP) formation was investigated for low pressure, medium pressure and pulsed UV technologies using a broad range of UV doses. Four classes of DBPs (THMs, HAAs, aldehydes and carboxylic acids) were examined. This enabled the determination of effects resulting from the direct action of UV irradiation on natural organic matter (aldehydes, carboxylic acids) as well as effects on the ultimate formation of chlorinated DBPs (THMs and HAAs) from secondary chlorination. For doses of less than 1,000 mJ/cm2, UV irradiation did not affect THM and HAA formation in subsequent chlorination processes, however higher UV doses resulted in lower ultimate concentrations of THMs and HAAs. UV irradiation also resulted in the formation of aldehydes and carboxylic acids at UV doses above 500 mJ/cm2, compounds that are known to adversely effect drinking water biostability.

scholarly journals Differential absorbance as evaluation method of TOX concentrations generated during surface water chlorination

2018 ◽  
Vol 59 ◽  
pp. 00030
Author(s):  
Andrzej Jodłowski
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Surface Waters ◽  
Evaluation Method ◽  
Total Concentration ◽  
Halogen Compounds ◽  
Adsorption Processes ◽  
Water Chlorination ◽  
By Products

Chlorination of waters containing natural organic matter (NOM) produces disinfection by-products (DBPs) including harmful THMs and HAAs. A collective parameter and toxicity index of all chlorination products contained in finished water is the total concentration of organic-bound halogen compounds (TOX). Determination of this indicator is carried out by adsorption-pyrolysis method, which is complicated and requires specialized apparatus. The competitive method of TOX concentration determination in water is differential absorbance. Effect of natural organic matter removal from surface waters in coagulation as well in coagulation and adsorption processes on the decrease of TOX concentration measured by differential absorbance was determined.

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