UV-O3, UV-H2O2, UV-TiO2 and the photo-Fenton reaction - comparison of advanced oxidation processes for wastewater treatment

Ruppert, Gerald; Bauer, R.; Heisler, G.

doi:10.1016/0045-6535(94)90239-9

Cited by 218 publications

(83 citation statements)

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“…The homogeneous photo-Fenton process has attracted wide interest because of its relatively low cost and high performance in generating OH radicals for the decomposition of refractory organic compounds [1][2][3][4][5]. This process, however, produces a lot of sludge during treatment, which limits its wide application in wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of reactive brilliant red X-3B by heterogeneous photo-Fenton reaction using an Fe–Ce bimetal catalyst

et al. 2007

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Section: Introductionmentioning

confidence: 99%

Decolorization of reactive brilliant red X-3B by heterogeneous photo-Fenton reaction using an Fe–Ce bimetal catalyst

et al. 2007

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“…The photo-CF process has been applied to treating organic wastewaters containing chlorophenoxy herbicides (Pignatello, 1992), 4 -chlorophenol and dyes (Ruppert and Bauer, 1994), metolachlor and methyl parathion (Pignatello and Sun, 1995), reduction products of perchloroalkanes (Huston and Pignatello, 1996), quinoline (Cermenati et al, 1997) and xylidine (Nadtochenko and Kiwi, 1998). The photo-EF process significantly regenerates Fe(II) by both photolysis and electrolysis.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Processes for In-Situ Treatment of Contaminated Soils - Final Report - 09/15/1996 - 01/31/2001

Huang¹

2001

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Contamination of soils by toxic organic pollutants is an environmental concern. The insitu electrokinetic (EK) technology is an emerging process to remediate the contaminated soils. Since the electro-osmotic (EO) flow rate and sorption behaviors of pollutants are two critical factors of the process, this study focuses on understanding the partition of nonionic organic contaminants in soil-water system, mechanisms of the EO flow, and the transport of organic compounds under an externally applied electrostatic field. The target compounds include chlorinated organic compounds and polycyclic aromatic hydrocarbons (PAHs). In order to improve the treatment efficiency, surfactant and bio-surfactant were used. A thermodynamic concept, fugacity, was introduced to illustrate the interactions between organics and the soil. A semi-empirical equation was derived to describe the EO flow rate in unsaturated soils. Moverover, the diffusion-advection-sorption model was used to simulate the transport of nonionic organic contaminants in the presence of an electrostatic field.The sorption experiments were conducted with various initial solute concentrations and different soil to solution ratios. The selected chlorinated organics include tetrachloroethylene (PCE), trichloroethylene (TCE), carbon tetrachloride, and chloroform. Results show that Langnuir isotherm can be used to express the distribution behavior of these chlorinated organic compounds i n the soil-water system. In addition to the hydrophobicity (K ow ), the concentration of organic compound and soil to solution ratio can influence the distribution behavior also. In order to illustrate the effects of the organic concentration and soil to solution ratio, the activity coefficient was used.The activity coefficient, γ, a relative interaction based on chosen reference state, is a useful means to express the quantitative feature of the organic-soil interaction without detailed information of their interaction mechanisms. By comparing the activity coefficients, γ w and γ s (i.e., X s /X w ), one can illustrate the trend of organic distribution at the soil-water interfaces.The concentration effect can be explained by the changes in the adsorption of organic onto the soil surface. Based on the experimental results, when increasing the organic compound concentrations, the activity coefficient, γ w , can be considered as a constant and γ s increases due to the increase of interaction energy. The change of γ s makes the sorption isotherms of PCE, TCE, carbon tetrachloride, and chloroform non-linear. According to γ s , it can be seen that the sorption between these selceted chlorinated organics and the soil is exothermic.The effect of soil to solution ratio can be attributed to the presence of dissolved organic matter (DOM) in the liquid phase. DOM enhances the organic dissolution, which in turns increases the organic concentration, i.e., X w . Therefore, the partition coefficients of these chlorinated compounds, i.e., X s /X w , decrease with increasing the soil to solution ...

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“…Moreover, in order to reduce the area of the microalgal cultivator to reduce its size, it can be expected that the deep part of the microalgal cultivator is irradiated with light by an optical fiber to lead the light to the inside of the microalgal cultivator to generate ·OH. Because it is unnecessary to irradiate the sample with high-energy ultraviolet rays or use H 2 O 2 , this system provides an option for the decomposition of organic compounds, and especially the decolorization of chromophores, which has a substantially lower environmental impact (15,16).…”

Section: Discussionmentioning

confidence: 99%

Decolorization of Organic Compounds by Controlled Microalgal Culture

Hirayama¹

2017

Agrotechnol

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UV-O3, UV-H2O2, UV-TiO2 and the photo-Fenton reaction - comparison of advanced oxidation processes for wastewater treatment

Cited by 218 publications

References 11 publications

Decolorization of reactive brilliant red X-3B by heterogeneous photo-Fenton reaction using an Fe–Ce bimetal catalyst

Decolorization of reactive brilliant red X-3B by heterogeneous photo-Fenton reaction using an Fe–Ce bimetal catalyst

Electrochemical Processes for In-Situ Treatment of Contaminated Soils - Final Report - 09/15/1996 - 01/31/2001

Decolorization of Organic Compounds by Controlled Microalgal Culture

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