Fouling of TiO2 induced by natural organic matters during photocatalytic water treatment: Mechanisms and regeneration strategy

2021 ◽  
Vol 294 ◽  
pp. 120252
Author(s):  
Xuejia Yang ◽  
Hongwei Sun ◽  
Guiying Li ◽  
Taicheng An ◽  
Wonyong Choi
Keyword(s):  
Water Treatment ◽  
Regeneration Strategy ◽  
Organic Matters ◽  
Natural Organic Matters ◽  
Treatment Mechanisms

Kinetics of the reaction of hypobromous acid and organic matters in water treatment processes

2006 ◽  
Vol 53 (11) ◽  
pp. 235-243 ◽  
Author(s):  
S. Echigo ◽  
R.A. Minear
Keyword(s):  
Water Treatment ◽  
Organic Matters ◽  
Reaction Phase ◽  
Treatment Processes ◽  
Kinetic Information ◽  
Hypobromous Acid ◽  
Bromination Reaction ◽  
Natural Organic Matters ◽  
Kinetics Of ◽  
Reaction In Water

The fate of bromine species from human activity is affected by the bromination reaction in water treatment processes. In this study, kinetic information of the reaction between hypobromous acid (HOBr) and seven different natural organic matters (NOM) was collected by sequential stopped-flow techniques. Multiple reaction phases were found in the reaction between HOBr and NOM. The number of reaction sites for the faster reaction phase ranged from 0.26 to 0.92 μmole (mg DOC)−1, and was correlated to both SUVA and specific phenolic content at pH 7.0. The apparent second-order rate constants for the faster reaction phase at pH 7.0 ranged from 5.4 × 105 to 1.4 × 106 M−1·s−1, indicating that vanillin-like structures are involved in this reaction phase.

Natural organic matters removal efficiency by coagulation

2017 ◽  
Author(s):  
Mohd Sharizal Mohd Sapingi ◽  
Munirah Pishal ◽  
Mohamad Fared Murshed
Keyword(s):  
Removal Efficiency ◽  
Organic Matters ◽  
Natural Organic Matters

Distribution and Transformation of Molecular Weight of Organic Matters in a Canal Water Treatment Procedure

2012 ◽  
Vol 610-613 ◽  
pp. 2483-2487
Author(s):  
Xiao Dan Zhao ◽  
Chun Hua Wu ◽  
Zhen Zhou
Keyword(s):  
Molecular Weight ◽  
Activated Carbon ◽  
Water Treatment ◽  
Removal Rate ◽  
Ultrafiltration Membrane ◽  
Raw Water ◽  
Canal Water ◽  
Treatment Procedure ◽  
Organic Matters ◽  
Membrane Method

Distribution and transformation of molecular weight of organic matters in canal raw water, primary coagulated water, secondary coagulated water, enhanced coagulated water and water filtered by activated carbon were monitored by ultrafiltration membrane method. The results show that organics on the fraction of molecular weight less than 2kDa has the largest ratio in total organics of outlets of coagulation and activated carbon tank. Removal rate of total organics is about 73% by secondary coagulation, but which of micromolecule organics of molecular weight less than 2kDa is only 10%, which can be removed by activated carbon more than 80%.

Colloidal Properties of Air, Oxygen, and Nitrogen Nanobubbles in Water: Effects of Ionic Strength, Natural Organic Matters, and Surfactants

2018 ◽  
Vol 35 (7) ◽  
pp. 720-727 ◽  
Author(s):  
Ahmed Khaled Abdella Ahmed ◽  
Cuizhen Sun ◽  
Likun Hua ◽  
Zhibin Zhang ◽  
Yanhao Zhang ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Organic Matters ◽  
Colloidal Properties ◽  
Water Effects ◽  
Natural Organic Matters
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