scholarly journals Application of Catalytic Wet Peroxide Oxidation for Industrial and Urban Wastewater Treatment: A Review

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 673 ◽  
Author(s):  
Juan Rueda Márquez ◽  
Irina Levchuk ◽  
Mika Sillanpää
Keyword(s):  
Wastewater Treatment ◽  
Advanced Oxidation Process ◽  
Fixed Bed ◽  
Toxicity Assessment ◽  
Batch Reactors ◽  
Peroxide Oxidation ◽  
Urban Wastewater ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation ◽  
Urban Wastewater Treatment

Catalytic wet peroxide oxidation (CWPO) is emerging as an advanced oxidation process (AOP) of significant promise, which is mainly due to its efficiency for the decomposition of recalcitrant organic compounds in industrial and urban wastewaters and relatively low operating costs. In current study, we have systemised and critically discussed the feasibility of CWPO for industrial and urban wastewater treatment. More specifically, types of catalysts the effect of pH, temperature, and hydrogen peroxide concentrations on the efficiency of CWPO were taken into consideration. The operating and maintenance costs of CWPO applied to wastewater treatment and toxicity assessment were also discussed. Knowledge gaps were identified and summarised. The main conclusions of this work are: (i) catalyst leaching and deactivation is one of the main problematic issues; (ii) majority of studies were performed in semi-batch and batch reactors, while continuous fixed bed reactors were not extensively studied for treatment of real wastewaters; (iii) toxicity of wastewaters treated by CWPO is of key importance for possible application, however it was not studied thoroughly; and, (iv) CWPO can be regarded as economically viable for wastewater treatment, especially when conducted at ambient temperature and natural pH of wastewater.

Catalytic Wet Peroxide Oxidation Process for the Continuous Treatment of Polluted Effluents on a Pilot Plant Scale

2008 ◽  
Vol 11 (1) ◽  
Author(s):  
Fernando Martínez ◽  
M Isabel Pariente ◽  
Juan Antonio Melero ◽  
Juan Ángel Botas
Keyword(s):  
Pilot Plant ◽  
Fixed Bed ◽  
Pilot Scale ◽  
Fixed Bed Reactor ◽  
Continuous Treatment ◽  
Continuous Stirred Tank Reactor ◽  
Peroxide Oxidation ◽  
Wet Peroxide Oxidation ◽  
Pilot Plant Scale ◽  
Catalytic Wet Peroxide Oxidation

AbstractCatalytic Wet Peroxide Oxidation (CWPO) for the continuous treatment of a phenolic aqueous solution has been studied on a pilot scale process. The pilot plant has been designed by integration of a catalytic fixed bed reactor (FBR) with a continuous stirred tank reactor (CSTR). The CSTR is used as reservoir for the continuous delivering of a recirculation stream through the catalytic bed. The main part of phenol mineralization takes place by catalytic oxidation in the FBR. The mesoporous SBA-15 silica-supported iron oxide (Fe

scholarly journals Chemical vapor deposition of CuO on ZSM-5 membrane for catalytic wet peroxide oxidation of phenol in a fixed bed reactor

RSC Advances ◽  
2017 ◽  
Vol 7 (75) ◽  
pp. 47435-47447 ◽  
Author(s):  
Donglin He ◽  
Huiping Zhang ◽  
Ying Yan
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Fixed Bed ◽  
Chemical Vapor ◽  
Complete Removal ◽  
Fixed Bed Reactor ◽  
Peroxide Oxidation ◽  
Wet Peroxide Oxidation ◽  
Oxidation Of Phenol ◽  
Catalytic Wet Peroxide Oxidation

Complete removal of phenol and high TOC reduction (around 60%) can be achieved over CuO supported on ZSM-5 membrane.

scholarly journals Catalytic Wet Peroxide Oxidation of Cylindrospermopsin over Magnetite in a Continuous Fixed-Bed Reactor

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1250
Author(s):  
Macarena Munoz ◽  
David Ortiz ◽  
Julia Nieto-Sandoval ◽  
Samuel Cirés ◽  
Zahara M. de Pedro ◽  
...  
Keyword(s):  
Catalytic System ◽  
Flow Rate ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Cyanobacterial Blooms ◽  
Peroxide Oxidation ◽  
Ambient Conditions ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation

The development of cost-efficient and environmentally friendly technologies for the removal of cyanotoxins from water is crucial, given the increasingly frequent appearance of toxic cyanobacterial blooms. In this work, the application of catalytic wet peroxide oxidation (CWPO) promoted by natural magnetite for the removal of the highly toxic cyanotoxin cylindrospermopsin (CYN) has been investigated. A fixed-bed reactor packed with magnetite powder and granules was used to treat a continuous flow of CYN-bearing water. Experiments were carried out under ambient conditions and circumneutral pH (pH0 = 5). The effect of the main variables of the process, viz. magnetite load (8–14 g), feed flow rate (0.1–0.25 mL min−1), H2O2 dose (0.5–8 mg L−1) and initial CYN concentration (25–100 μg L−1), were systematically analyzed. CYN conversion values and kinetic constants were calculated to evaluate the feasibility of the catalytic system. The process was highly effective in the removal of the cyanotoxin, achieving up to 80% CYN conversion under optimized conditions (flow rate = 0.2 mL min−1, [H2O2]0 = 5 mg L−1, WFe3O4 = 14 g, pH0 = 5, T = 25 °C). It also showed reasonable activity (~55% CYN conversion) in two real samples (pond and river water). The decay on CYN conversion in these cases was mainly due to the scavenging of hydroxyl radicals by the co-existing species present in the matrices. Remarkably, the catalytic system showed high stability with limited iron leaching (the iron leached at the end of the experiments represented less than 0.2 wt.% of the catalyst’s initial iron content) in all cases. Its stability was further confirmed in a long-term continuous experiment (60 h time on stream). Furthermore, the magnetite granules at the top layer of the packed bed avoided the loss of magnetite powder from the reactor, confirming the suitability of the system for continuous long-term application.

scholarly journals Treatment of methyl orange by the catalytic wet peroxide oxidation process in batch and continuous fixed bed reactors using Fe-impregnated 13X as catalyst

2018 ◽  
Vol 78 (4) ◽  
pp. 936-946 ◽  
Author(s):  
Jian Liu ◽  
Gang Peng ◽  
Xia Jing ◽  
Zhengji Yi
Keyword(s):  
Methyl Orange ◽  
Flow Rate ◽  
Batch Reactor ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Feed Flow Rate ◽  
Peroxide Oxidation ◽  
Wet Peroxide Oxidation ◽  
Fixed Bed Reactors ◽  
Catalytic Wet Peroxide Oxidation

Abstract Fe-impregnated 13X (Fe-13X) catalysts were prepared for catalytic wet peroxide oxidation (CWPO) of methyl orange (MO) solution in batch and continuous fixed bed reactors. A systematical study was carried out to investigate the influence of the main operating parameters on the batch reactor performance. The kinetic curves were analyzed by using a pseudo-first-order kinetic equation over the 30–70 °C temperature range. In addition, the effects of catalysts filling amount and feed flow rate on the catalytic performance of Fe-13X catalysts in a fixed bed reactor were studied. The experimental results showed that the Fe-13X catalysts achieved the highest activity (100% MO conversion and 74.5% chemical oxygen demand (COD) elimination ratio, respectively) at 25 min with trace mount of Fe leaching concentration (<2.1 mg/L) at the optimized reaction conditions (namely 1.0 g/L catalyst concentration, pH 2.0, 17.6 mM H2O2, 70 °C) in a batch reactor. Kinetic studies showed that two different reaction regions existed, and an activation energy of 51.9 kJ/mol for the second region was found. Under the optimal operating conditions found (namely, catalysts filling amount of 3.5 g, feed flow rate of 4 mL/min), the Fe-13X catalysts displayed high MO conversion (99.4%) and COD elimination ratio (77.1%) after continuously ran for 200 min in a fixed bed reactor.

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