Comparison of the efficiency of OH radical formation during ozonation and the advanced oxidation processes O3/H2O2 and UV/H2O2

Rosenfeldt, Erik J.; Linden, Karl G.; Canonica, Silvio; Gunten, Urs von

doi:10.1016/j.watres.2006.09.008

Cited by 437 publications

(192 citation statements)

References 26 publications

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“…H 2 O 2 concentration was determined by the DMP (2, 9-dimethyl-1,10-phenanthroline) method (Kosaka et al, 1998). (Gunten, 2003;Rosenfeldt et al, 2006;Tizaoui et al, 2007;Wu et al, 2007;Bandyopadhyay and Chattopadhyay, 2007;El Diwani et al, 2009). Therefore, these abnormal results could be due to interference by H 2 O 2 since overestimation was not observed during treatment with ozone alone or O 3 /UV.…”

Section: Methodsmentioning

confidence: 99%

“…This was confirmed by measuring the COD value of the KHP solutions. KHP is often used as a standard COD analyte because it is completely oxidized by standard COD analysis; 1 mg of KHP normally has a theoretical COD value of 1.177 mg. Fronk, 1987;Gunten, 2003;Rosenfeldt et al, 2006;Kwon et al, 2009). Similar approach has been used to the treatment of industrial wastewaters using H 2 O 2 alone (Zak, 2008).…”

Section: Error In Livestock Wastewater Cod Values Due To H 2 Omentioning

confidence: 99%

See 1 more Smart Citation

Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater

Lee

Kim

et al. 2011

Int. J. Environ. Sci. Technol.

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It is known that hydrogen peroxide interferes with chemical oxygen demand analysis by consuming oxidation agents such as potassium dichromate, thus leading to overestimation of the chemical oxygen demand measurements. The objective of the study was to investigate the effects of hydrogen peroxide interference and to determine true chemical oxygen demand values on interpreting treatment performance during ozone-based advanced oxidation of livestock wastewater in which hydrogen peroxide concentration and chemical oxygen demand values are dynamically changing. According to the chemical oxygen demand monitoring data, chemical oxygen demand values were always higher than the initial chemical oxygen demand load when hydrogen peroxide was involved and the treatment performance with ozone alone or ozone/ultraviolet was better than with coupled hydrogen peroxide. The extent of overestimation was proportional to the remaining hydrogen peroxide concentration and the average overestimation ratio in livestock wastewater was in the range of 0.50~0.58 mg per 1 mg of hydrogen peroxide, depending upon the quality of the wastewater treated. True chemical oxygen demand values were estimated by correlating the extent of overestimation with the remaining hydrogen peroxide concentration during treatment. The extent of overestimation decreased to zero gradually as the amount of hydrogen peroxide also approached zero as oxidation proceeded. The corrected chemical oxygen demand values indicated underlying tendency of oxidation, which could not be seen in the original chemical oxygen demand monitoring data. Application of ozone/hydrogen peroxide was more efficient for reducing chemical oxygen demand than ozone alone, as was ozone/hydrogen peroxide/ultraviolet compared to ozone/ultraviolet. When coupled with ozone, ultraviolet irradiation was more efficient than hydrogen peroxide for decreasing chemical oxygen demand during treatment of livestock wastewater.

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Section: Methodsmentioning

confidence: 99%

Section: Error In Livestock Wastewater Cod Values Due To H 2 Omentioning

confidence: 99%

Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater

Lee

Kim

et al. 2011

Int. J. Environ. Sci. Technol.

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“…2), which implied that it would save energy consumption if the recovered heat were used to preheat the excess sludge before the AOP of microwave and H 2 O 2 . The sludge pretreatment by the AOP of microwave and H 2 O 2 is less cost effective than that by ozonation, because the prices of ozone and H 2 O 2 were D 1.0-1.5/kgO 3 [21] and D 1.0/kgH 2 O 2 [22], and the recommend ozone dosage (0.2 kgO 3 /kgTSS) [23] in sludge pretreatment by ozonation was less than that (1 kg H 2 O 2 /kgTSS) in the AOP of microwave and H 2 O 2 of this study. Notably, it is found in this study that the residual H 2 O 2 in the sludge bulk solution was as high as over 75%, which means that there is great potential to reduce the dosage of H 2 O 2 .…”

Section: Optimization Of H 2 O 2 Dosagementioning

confidence: 99%

Effect of H2O2 dosing strategy on sludge pretreatment by microwave-H2O2 advanced oxidation process

Wang

Wei

Liu

2009

Journal of Hazardous Materials

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a b s t r a c t Considering characteristics of breaking down H 2 O 2 into water and molecular oxygen by catalase in waste activated sludge (WAS), the effect of H 2 O 2 dosing strategy on sludge pretreatment by the advanced oxidation process (AOP) of microwave-H 2 O 2 was investigated by batch experiments for optimizing H 2 O 2 dosage. Results showed that the catalase in sludge was active at the low temperature range between 15• C and 45• C, and gradually lost activity from 60• C to 80• C. Therefore, the H 2 O 2 was dosed at 80• C, to which the waste activated sludge was first heated by the microwave (MW), and then the sludge dosed with H 2 O 2 was continuously heated till 100• C by the microwave. Results at different H 2 O 2 dosages showed that the higher the H 2 O 2 dosing ratio was, the more the SCOD and total organic carbon (TOC) were released into the supernatant, and the optimum range of H 2 O 2 /TCOD ratio should be between 0.1 and 1.0. The percentages of consumed H 2 O 2 in the AOP of microwave and H 2 O 2 treating the WAS were 25.38%, 22.53%, 14.82%, 13.61% and 19.63% at different H 2 O 2 /TCOD dosing ratios of 0.1, 0.5, 1, 2, 4, respectively. Along with the increasing H 2 O 2 /TCOD ratio, the contents of TCOD on particles, soluble substances and mineralization increased and the TCOD distribution on solids decreased.

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“…Initially, the focus was on the comparison between the efficiencies of the treatments for micropollutant removal at equal oxidant cost concentrations rather than molarities. The pricing of commercial applications to achieve 90% of atrazine removal from an initial concentration of 1 μg/L is estimated to be 0.08 USD/m 3 treated water (Rosenfeldt et al, 2006). Since this value is used as a design point for commercial applications, the oxidant concentrations were chosen to remain within the targeted pricing point of 0.08 USD/m 3 (Scheme A1, Table A4, Appendix A).…”

Section: The Low Selectivity Of Homentioning

confidence: 99%

“…Treatment facilities that have currently incorporated this treatment process including the PWN in the Netherlands and the Aurora Reservoir or Orange Country, CA, USA are using 5-6 mg/L H 2 O 2 and around 0.7 to 0.8 kWh/m 3 water treated (Kruithof et al, 2007;Linden and Rosenfeldt, 2011). The overall process cost can be therefore calculated by using the following pricing information: Energy 0.085 €/kWh; H 2 O 2 1 €/kg; (Rosenfeldt et al, 2006) and the price of Na 2 S 2 O 8 is 130% more of H 2 O 2 on a weight basis (based on EU and USA prices). This gives an approximate value of 0.08 USD/m 3 for 90% atrazine removal (Kruithof et al, 2007).…”

Section: Experimental Designmentioning

confidence: 99%

Comparison of UVC/S2O82− with UVC/H2O2 in terms of efficiency and cost for the removal of micropollutants from groundwater

Antoniou

Andersen

2015

Chemosphere

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Highlights Cost comparison of UVC/HP and UVC/PS for groundwater treatment.  UVC/PS performed better for atrazine removal in Milli-Q water.  UVC/HP had a better overall performance for the removal of the mixture of contaminants.  Results from the collimated beam apparatus were comparable to the flow-through system.  UVC/PS is economically feasible for special matrices where selective oxidation is required. Graphical Abstract 2 AbstractThis study compared the UVC/S 2 O 8 2-system with the more commonly used AOP in water industry, UVC/H 2 O 2 , and examined whether the first one can be an economically feasible alternative technology. Atrazine and 4 volatile compounds (methyl tert-butyl ether, cisdichlorethen, 1,4-dioxane and 1,1,1-trichloroethane) were chosen as model contaminants because they exhibit different susceptibility to UVC photolysis and AOPs. A collimated beam apparatus was utilized for the majority of the experiments (controlled environment, without mass transfer phenomena), while selected experiments were performed in a flow-through reactor to simulate industrial applications. Initial experiments on the activation of oxidants with a LP lamp indicated that S 2 O 8 2-is photolysed about 2.3 times faster than H 2 O 2 and that the applied treatment times were not sufficient to utilize the majority of the oxidant. The effect of oxidants' concentrations were tested with atrazine alone and in the micropollutants' mixture and it was decided to use 11.8 mg/L S 2 O 8 2-and 14.9 mg/L H 2 O 2 for further testing since is closer to industrial applications and to minimize the residual oxidant concentration. Changes of the matrix composition of the treated water were investigated with the addition of chloride, bicarbonate and humic acids at concentrations relevant to a well-water-sample, the results showed that the system least affected was UVC/H 2 O 2 . Only when bicarbonate was used, UVC/S 2 O 8 2-performed better. Overall, testing these systems with the mixture of micropollutants gave better insights to their efficiency than atrazine alone and UVC/S 2 O 8 2-is recommended for selective oxidation of challenging matrices.

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Comparison of the efficiency of OH radical formation during ozonation and the advanced oxidation processes O3/H2O2 and UV/H2O2

Cited by 437 publications

References 26 publications

Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater

Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater

Effect of H2O2 dosing strategy on sludge pretreatment by microwave-H2O2 advanced oxidation process

Comparison of UVC/S2O82− with UVC/H2O2 in terms of efficiency and cost for the removal of micropollutants from groundwater

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