Carbonaceous DBPs (THMs and HAAs) formation on Cl2 and ClO2 treatment of aqueous soluble fractions of soil-derived natural organic matter

2022 ◽  
Author(s):  
R. K. Padhi
Keyword(s):  
Organic Matter ◽  
Surface Water ◽  
Dissolved Organic Matter ◽  
Natural Organic Matter ◽  
Substantial Portion ◽  
Disinfection Byproduct ◽  
Terrestrial Origin ◽  
Soluble Fractions

surface water dissolved organic matter feature substantial portion of terrestrial origin and serve as important precursor for toxic disinfection byproduct formation.In the present study, organic matter extracted from the composite...

Removal of the Neutral Dissolved Organic Matter (NDOM) from Surface Water by Coagulation/Flocculation and Nanofiltration

2021 ◽  
pp. 1-14
Author(s):  
Sami Khettaf ◽  
Roumaissa Boumaraf ◽  
Fatiha Benmahdi ◽  
Kamel-Eddine Bouhidel ◽  
Mohammed Bouhelassa
Keyword(s):  
Organic Matter ◽  
Surface Water ◽  
Dissolved Organic Matter

scholarly journals Degradation and transformation of natural organic matter accountable for disinfection byproduct formations by UV photolysis and UV/chlor(am)ine

2018 ◽  
Vol 79 (5) ◽  
pp. 929-937 ◽  
Author(s):  
Chanathip Hirun-Utok ◽  
Songkeart Phattarapattamawong
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Low Pressure ◽  
Haloacetic Acid ◽  
Uv Photolysis ◽  
Disinfection Byproduct ◽  
Proportional Relationship ◽  
Vacuum Uv ◽  
Potential Use

Abstract This research aimed to investigate the degradation of natural organic matter responsible for the formation of trihalomethane (THM), haloacetic acid (HAA) and haloacetonitrile (HAN) during ultraviolet (UV) photolysis and a co-exposure of UV with chlorine (UV/chlorine) and chloramine (UV/chloramine). Low pressure UV (LPUV) and vacuum UV (VUV) lamps were used for photolysis. VUV and LPUV irradiation changed aromatic/unsaturated structures to aliphatic ones, resulting in decreased THM and HAN formation. Following irradiation for 60 min, LPUV decreased THM and HAN by 16% ± 2% and 20% ± 6%, respectively. VUV decreased THM and HAN formation by 23% ± 3% and 20% ± 8%, respectively. HAA formation increased following photolysis. UV/chlorine treatment decreased THM, HAA and HAN. Higher chlorine doses had an inversely proportional relationship with THM and HAN formation. A chlorine dose of 4 mg·L−1 led to the greatest reductions, corresponding to 42% ± 2%, 10% ± 10% and 18% ± 6% for THM, HAA and HAN, respectively. UV/chloramine decreased the formation of THM more than UV/chlorine. With a chloramine dose of 4 mg·L−1, THM, HAA and HAN formation decreased by 74% ± 10%, 10% ± 10% and 11% ± 10%, respectively. This study showed the potential use of UV/chlor(am)ine for controlling the formation of THM, HAA and HAN.

Application of composite flocculants for removing organic matter and mitigating ultrafiltration membrane fouling in surface water treatment: the role of composite ratio

2019 ◽  
Vol 5 (12) ◽  
pp. 2242-2250
Author(s):  
Xue Shen ◽  
Baoyu Gao ◽  
Kangying Guo ◽  
Qinyan Yue
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Surface Water ◽  
Membrane Permeability ◽  
Natural Organic Matter ◽  
Membrane Fouling ◽  
Ultrafiltration Membrane ◽  
Surface Water Treatment ◽  
Ultrafiltration Membrane Fouling

Coagulation prior to the ultrafiltration (UF) process was implemented to improve natural organic matter (NOM) removal and membrane permeability.

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