Identifications of Optimal Conditions for Photo-Fenton Reaction in Water Treatment

2016 ◽  
Vol 21 (1) ◽  
pp. 86-93
Author(s):  
Tae Hyup Oh ◽  
Hanuk Lee ◽  
Sung Jik Park ◽  
Jae-Woo Park
Keyword(s):  
Water Treatment ◽  
Fenton Reaction ◽  
Optimal Conditions ◽  
Reaction In Water

scholarly journals Supported Nanosizedα-FeOOH Improves Efficiency of Photoelectro-Fenton Process with Reaction-Controlled pH Adjustment for Sustainable Water Treatment

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Chuan Wang ◽  
Hong Liu ◽  
Zhimin Sun ◽  
Jian Huang ◽  
Yang Liao
Keyword(s):  
Iron Oxide ◽  
Water Treatment ◽  
Fenton Reaction ◽  
Fenton Process ◽  
Major Step ◽  
Ph Adjustment ◽  
Extra Energy ◽  
Initial Ph ◽  
The Individual ◽  
20 Nm

The overall photoelectro-Fenton (PE-Fenton) process for water treatment with neutral initial pH includes three steps of pH reduction, PE-Fenton reaction, and pH elevation. Reaction-controlled pH adjustment (RCpA), which utilizes the intrinsic electrochemical reactions instead of chemical addition, has been employed to lower the pH, maintain the lowered pH for the Fenton reaction, and recover the pH for final effluent discharge. This study demonstrated that the overall efficiency of this sustainable PE-Fenton process was improved by rapidly recycling the iron substance. Nanosized iron oxide was prepared and employed to ensure such rapid recycling. SEM and XRD results showed that the as-prepared iron oxide wasα-FeOOH with 20 nm in size. The experimental results of dimethyl phthalate (DMP) degradation showed that diatomite-supportedα-FeOOH (N-α-FeOOH/diatomite) could efficiently reduce the DMP concentration and total organic carbon. Furthermore, compared with Fe3+, the N-α-FeOOH/diatomite saved 160 min for iron settlement at 20 mg L−1DMP concentration. Also, with the increment in the initial DMP concentration, extra energy consumed by the individual step of PE-Fenton reaction using the N-α-FeOOH/diatomite became negligible compared with that using free iron ions with the increment in the initial DMP concentration. This development is expected to be a major step of the PE-Fenton process with RCpA towards actual water treatment.

scholarly journals Structural Ceramics Modified by Water Treatment Plant Sludge

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5293
Author(s):  
Alexander Orlov ◽  
Marina Belkanova ◽  
Nikolay Vatin
Keyword(s):  
Water Treatment ◽  
Building Materials ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Raw Water ◽  
Optimal Conditions ◽  
Structural Ceramics ◽  
Water Treatment Plant Sludge ◽  
Spray Dried ◽  
Modifying Additive

Water treatment plant (WTP) sludge is actively used in building materials production. The object of this research was modifying additives for ceramic bricks from WTP aluminium-containing sludge. The research aim of this study was to determine the suitability of a million-plus population city’s WTP sludge as a burning-out additive in the production of structural ceramics and to establish the optimal conditions for obtaining products with the best characteristics. The raw water belongs to water belongs to the hydrocarbonate class, the calcium group, and it is of low turbidity (1.5–40 mg/L kaolin). Sludge, sourced from WTP sedimentation tanks, was dewatered by adding lime or by using the freezing-thawing method. The spray-dried WTP sludge is introduced into the clay in amounts of 5% to 20% by weight. The addition of 20% reduces the sensitivity of the clay to drying, reduces the density of ceramic by 20% and simultaneously increases its compressive strength from 7.0 to 10.2 MPa. The use of WTP sludge as a modifying additive, pretreated by the freezing-thawing method, makes it possible to obtain ceramic bricks with improved properties. The results can be used for WTP sludge containing aluminium obtained by treating water of medium turbidity and medium colour.

Water treatment plant sludge as iron source to catalyze a heterogeneous photo-Fenton reaction

2020 ◽  
Vol 17 ◽  
pp. 100544 ◽  
Author(s):  
Patrícia Grassi ◽  
Fernanda Caroline Drumm ◽  
Jordana Georgin ◽  
Dison Stracke Pfingsten Franco ◽  
Edson Luiz Foletto ◽  
...  
Keyword(s):  
Water Treatment ◽  
Fenton Reaction ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Iron Source ◽  
Water Treatment Plant Sludge

Supramolecular polymer networks based on pillar[5]arene: synthesis, characterization and application in the Fenton reaction

2020 ◽  
Vol 56 (6) ◽  
pp. 948-951 ◽  
Author(s):  
Runmiao Zhang ◽  
Xin Yan ◽  
Hao Guo ◽  
Lanping Hu ◽  
Chaoguo Yan ◽  
...  
Keyword(s):  
Fenton Reaction ◽  
Polymer Networks ◽  
Supramolecular Polymer ◽  
Bonding Interaction ◽  
Supramolecular Networks ◽  
Reaction In Water

New supramolecular networks with ferrocene units were efficiently constructed via orthogonal pillar[5]arene-based host–guest and H-bonding interaction. It can be applied in Fenton-like reaction in water.

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.

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