Evaluation of the treatment performance of a multistage ozone/hydrogen peroxide process by decomposition by-products

Kosaka, Koji; Yamada, Harumi; Shishida, Kenichi; Echigo, Shinya; Minear, Roger A.; Tsuno, Hiroshi; Matsui, Saburo

doi:10.1016/s0043-1354(01)00087-2

Cited by 86 publications

(37 citation statements)

References 14 publications

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“…Cyanide, thiocyanate, nitrite, chloride, hypochlorite, and organic matters in wastes are efficiently removed by hydrogen peroxide. [7] Hydrogen peroxide is also used for soil remediation. Oxidizing agents such as the hydroxyl radical, superoxide anion, hydroperoxide radical, and hydroperoxide anion are considered to be generated from hydrogen peroxide catalyzed by iron or other transition metal ions in soil.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Study on the Production of Hydrogen Peroxide in the Anthraquinone Process

et al. 2011

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Hydrogen peroxide is produced from hydrogen gas and air in industry by using the anthraquinone process. The mechanism for the production of hydrogen peroxide in this process is studied by using DFT calculations and reaction rate measurements. A hydrogen atom of anthrahydroquinone (AHQ) is directly abstracted by triplet dioxygen to produce a hydroperoxide radical (HOO·) and a 10‐hydroxy‐9‐anthroxyl radical (AQH·), followed by subsequent hydrogen atom abstraction that leads to the formation of hydrogen peroxide and anthraquinone (AQ). Hydrogen atom abstraction was found to be the rate‐determining step in this process. Tetrahydroanthrahydroquinone (THAHQ) is also used in this process in a similar way to AHQ, but a higher activation energy is required for the rate‐determining step when THAHQ is used, which would lead to a 25‐fold rate deacceleration compared with AHQ at 27 °C. The reactivities of AHQ and THAHQ are not significantly influenced by effects of side alkyl chain that is used in the industrial process for increasing the solubility of AHQ and AQ in working solution. The relative reaction rate of AHQ and THAHQ is measured under laboratory conditions. The computational results are consistent with an observed lower rate of the oxidation process of THAHQ.

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Section: Introductionmentioning

confidence: 99%

Mechanistic Study on the Production of Hydrogen Peroxide in the Anthraquinone Process

et al. 2011

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“…It may cause by the alkaline media that dissociated form of hydrogen peroxide (HO2 -) reacts with hydroxcyl radicals (reaction 2.) more than two orders of magnituted faster than observed hydrogen peroxide, leading loss of carbon oxidation potential which is confirmed by a slight decrease in COD removal under alkaline condition [26].…”

Section: Uv/h2o2/o3 Processmentioning

confidence: 56%

Advanced Oxidation Processes (AOPs) for Refinery Wastewater Treatment Contains High Phenol Concentration

Azizah

Widiasa

2018

MATEC Web Conf.

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Abstract. Petroleum Refinery wastewater is characterized by a high phenol content. Phenol is toxic and resistant to biological processes for treatment of the petroleum refinery wastewater. The combination of an AOP and a biological process can be used for treatment of the refinery wastewater. It is necessary to conduct a study to determine the appropriate condition of AOP to meet the phenol removal level. Two AOP configurations were investigated: H2O2 / UV and H2O2 / UV / O3. From each process samples, COD, phenol and pH were measured. The oxidation was carried out until the targeted phenol concentration of treated effluent were obtained. The better result obtained by using process H2O2 / UV / O3 with the H2O2 concentration 1000 ppm. After 120 minutes, the final target has been achieved in which phenol concentration of 37.5 mg/L or phenol degradation of 93.75%.

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“…Specifically, organic species with high MW were broken into low MW compounds such as aldehydes, ketones, hydrocarbon and esters by ozone molecules (or ·OH radicals). After 50 min of ozonation, organic compounds with high reactivity (e. g., ketones and esters ) were mineralized into CO 2 and H 2 O or oxidized forming small organic acids (e. g., oxalic acid) by O 3 (or ·OH radicals) [16] . In fact, the products, formed after 50 min of ozonation, had higher saturated hydrocarbon content than that formed in the initial 10 min of reaction ( Table 1), indicating that the saturated hydrocarbons were the main final products.…”

Section: Intermediate Products Detected By Gc/msmentioning

confidence: 99%

Species transformation and structure variation of fulvic acid during ozonation

Liu

et al. 2008

Sci. China Ser. B-Chem.

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The species transformation and structure variation of fulvic acid (FA) during ozonation were investigated in this study. The molecular weight (MW) distribution, the species of intermediate products and the variation of polar functional groups were studied by ultrafiltration, gas chromatography/mass spectrometry (GC/MS) and titration analyses respectively. The average MW of FA decreased significantly during ozonation. The amount of polar functional groups (carboxylic and phenolic (ph-OH) groups) per unit DOC (mol/kg C) increased with increasing ozonation time. Furthermore, GC/MS experiments demonstrated the formation of polar species (e.g., hexadecanoic acid, benzoic acid and octadecanoic alcohol) and less-polar species (e.g., aliphatic hydrocarbons and butanedioic acid, bis(2-methylpropyl) ester). Electron spin resonance (ESR) measurements proved the presence of ·OH radicals in the ozonation system. Based on our experimental results, it appears that the oxidations by ozone molecule and ·OH radicals were responsible for the transformation of organics (FA and its oxidation products) during ozonation. These two oxidants showed significant influence on organics transformation and exhibited different mechanisms contributing to these processes.

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Evaluation of the treatment performance of a multistage ozone/hydrogen peroxide process by decomposition by-products

Cited by 86 publications

References 14 publications

Mechanistic Study on the Production of Hydrogen Peroxide in the Anthraquinone Process

Mechanistic Study on the Production of Hydrogen Peroxide in the Anthraquinone Process

Advanced Oxidation Processes (AOPs) for Refinery Wastewater Treatment Contains High Phenol Concentration

Species transformation and structure variation of fulvic acid during ozonation

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