Influence of Water Matrix on the Degradation of Organic Micropollutants by Ozone Based Processes: A Review on Oxidant Scavenging Mechanism

2022 ◽  
pp. 128189
Author(s):  
Anam Asghar ◽  
Holger V. Lutze ◽  
Jochen Tuerk ◽  
Torsten C. Schmidt
Keyword(s):  
Organic Micropollutants ◽  
Water Matrix ◽  
Influence Of Water

Effects of water matrix and ozonation on natural organic matter fractionation and corresponding disinfection by-products formation

2014 ◽  
Vol 15 (1) ◽  
pp. 75-83 ◽  
Author(s):  
J. Agbaba ◽  
J. Molnar ◽  
A. Tubić ◽  
M. Watson ◽  
S. Maletić ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Natural Organic Matter ◽  
Oxidation Treatment ◽  
Trihalomethane Formation Potential ◽  
Water Matrix ◽  
Organic Matter Fractionation ◽  
Influence Of Water ◽  
The Individual ◽  
By Products

In this study the influence of water matrix and oxidation treatment by ozone on natural organic matter (NOM) fractionation and corresponding disinfection by-products formation was investigated. Three water types were selected, based on their different NOM contents (5.16–9.85 mg/L dissolved organic carbon (DOC)) and structures (42–79% proportion of hydrophobic NOM fraction). It was determined that increasing the ozone dose (0.2–0.8 mg O3/mg DOC) generally led to reductions in DOC (2–26%) and trihalomethane formation potential values (4–58%). Results of NOM fractionation showed that the reactivity of all the individual NOM fractions towards trihalomethane formation decreased after ozone oxidation (0.8 mg O3/mg DOC) by 47–69%, relative to the raw waters.

scholarly journals Influence of water matrix species on persulfate oxidation of phenol: reaction kinetics and formation of undesired degradation byproducts

2018 ◽  
Vol 2017 (2) ◽  
pp. 340-350 ◽  
Author(s):  
Jie Ma ◽  
Haiyan Li ◽  
Yongqi Yang ◽  
Xuening Li
Keyword(s):  
Reaction Kinetics ◽  
Phenol Degradation ◽  
Control Treatment ◽  
Gas Chromatography Mass Spectrometry ◽  
Persulfate Oxidation ◽  
Water Matrix ◽  
Halogenated Phenols ◽  
Influence Of Water ◽  
Oxidation Of Phenol ◽  
Hydrolysis Of

Abstract The present study explored the influence of Cl−, Br−, CO32−, HCO3−, PO43−, HPO42−, NO3−, SO32− and natural organic matter (NOM) on the reaction kinetics and the formation of undesired degradation byproducts during phenol oxidation by heat-activated persulfate (PS). CO32− and PO43− promoted the phenol degradation, because the hydrolysis of CO32− and PO43− created basic pH conditions which were conducive to enhanced PS oxidation rate. Br− promoted the reaction by reacting with sulfate radicals (SO4•−) to produce bromine radicals that can selectively react with electron-rich phenol. NOM scavenged reactive SO4•−, thus inhibiting the reaction. As a strong reducing agent, SO32− rapidly reduced PS, thus completely suppressing the reaction. HCO3−, HPO42−, Cl−, and NO3− had negligible impact on PS oxidation of phenol. Six intermediates were detected in the no anion control using gas chromatography–mass spectrometry (GC-MS). Various toxic halogenated phenols and halogenated hydroquinones were detected in the treatment containing Cl− and Br−. In contrast, in the treatment containing CO32−, HCO3−, PO43−, HPO42−, and NO3−, no new intermediates were identified except for the intermediates already detected in the control treatment. Based on intermediates identified, reaction pathways for PS oxidation of phenol without anions and in the presence of halides were proposed respectively.

Degradation of anionic azo dyes in aqueous solution using a continuous flow photocatalytic packed-bed reactor: Influence of water matrix and toxicity evaluation

2020 ◽  
Vol 8 (6) ◽  
pp. 104549
Author(s):  
Vincenzo Vaiano ◽  
Olga Sacco ◽  
Giovanni Libralato ◽  
Giusy Lofrano ◽  
Antonietta Siciliano ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Azo Dyes ◽  
Continuous Flow ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Toxicity Evaluation ◽  
Water Matrix ◽  
Influence Of Water

Ultraviolet/Hydrogen Peroxide Oxidative Degradation of 1,2,3-Trichlorobenzene: Influence of Water Matrix and Toxicity Assessment

2019 ◽  
Vol 36 (8) ◽  
pp. 947-957 ◽  
Author(s):  
Tajana Đurkić ◽  
Jelena Molnar Jazić ◽  
Marijana Kragulj Isakovski ◽  
Snežana Maletić ◽  
Aleksandra Tubić ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Oxidative Degradation ◽  
Toxicity Assessment ◽  
Water Matrix ◽  
Influence Of Water

scholarly journals Optimization of UV/H2O2 processes for the removal of organic micropollutants from drinking water: effect of reactor geometry and water pretreatment on EEO values

2016 ◽  
Vol 17 (2) ◽  
pp. 508-518 ◽  
Author(s):  
C. H. M. Hofman-Caris ◽  
D. J. H. Harmsen ◽  
A. M. Van Remmen ◽  
A. H. Knol ◽  
W. L. C. van Pol ◽  
...  
Keyword(s):  
Drinking Water ◽  
Energy Demand ◽  
Electrical Energy ◽  
High Energy ◽  
Additional Treatment ◽  
Matrix Composition ◽  
Organic Micropollutants ◽  
Water Matrix ◽  
Reactor Geometry ◽  
Electrical Energy Per Order

Increasing concentrations of organic micropollutants, like pharmaceuticals, in surface water may require additional treatment for drinking water production. The UV/H2O2 process is very effective for this purpose, but is known for its relatively high energy demand. This energy demand may be decreased by improving the water matrix composition and/or by optimizing UV reactor geometry. Thus, operational costs of the process may be decreased. This can be visualized by calculating the Electrical Energy per Order (EEO). By optimizing the water matrix, e.g. by pretreating the water by filtration over activated carbon or with O3/H2O2, the energy demand decreased up to 70%. This is affected by the concentration and type of the natural organic matter present. By optimizing reactor geometry an additional decrease in energy demand, up to 40%, could be obtained. How efficient the process may become strongly depends on the characteristics of the micropollutants involved.

scholarly journals THE INFLUENCE OF WATER MATRIX ON THE SEPARATION OF SELECTED ESTROGENS AND XENOESTROGENS BY NANOFILTRATION

2017 ◽  
Vol 18 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Mariusz Dudziak ◽  
Edyta Burdzik-Niemiec
Keyword(s):  
Water Matrix ◽  
Influence Of Water

Sulphate radical oxidation of benzophenone: kinetics, mechanisms and influence of water matrix anions

2020 ◽  
pp. 1-9
Author(s):  
Jie Ma ◽  
Yuan Feng ◽  
Xin Yang ◽  
Yongxin Wu ◽  
Shuo Wang ◽  
...  
Keyword(s):  
Radical Oxidation ◽  
Water Matrix ◽  
Influence Of Water

Study of the influence of water matrix components on admicellar sorbents

2007 ◽  
Vol 388 (8) ◽  
pp. 1823-1830 ◽  
Author(s):  
Amalia García-Prieto ◽  
Loreto Lunar ◽  
Soledad Rubio ◽  
Dolores Pérez-Bendito
Keyword(s):  
Water Matrix ◽  
Influence Of Water ◽  
Matrix Components

Influence of water matrix on copper-catalysed continuous ozonation and related ecotoxicity

2015 ◽  
Vol 163 ◽  
pp. 233-240 ◽  
Author(s):  
Alice L. Petre ◽  
Jose B. Carbajo ◽  
Roberto Rosal ◽  
Eloy García-Calvo ◽  
Pedro Letón ◽  
...  
Keyword(s):  
Water Matrix ◽  
Influence Of Water
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