Author
K. Harada
Bio: K. Harada is an academic researcher. The author has contributed to research in topics: Suspension (vehicle) & Hydrogen peroxide. The author has an hindex of 1, co-authored 1 publications receiving 73 citations.
Topics: Suspension (vehicle), Hydrogen peroxide
Papers
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TL;DR: In this article, the vitesse de photodegradation du trichloroethylene and du tetrachloro methylene en suspension dans le dioxyde de titane par les radicaux HO•
Abstract: Etude de la vitesse de photodegradation du trichloroethylene et du tetrachloroethylene en suspension dans le dioxyde de titane par les radicaux HO•
73 citations
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TL;DR: In the first part of this two article series on the imperative technologies for wastewater treatment, a review of oxidation processes operating at ambient conditions was presented It has been observed that none of the methods can be used individually in wastewater treatment applications with good economics and high degree of energy efficiency Moreover, the knowledge required for the large-scale design and application is perhaps lacking as mentioned in this paper.
898 citations
TL;DR: In this paper, the photocatalytic oxidation of methylene blue, Rhodamine B, methyl orange and salicylic acid have been studied in the presence of immobilized titanium dioxide coated sand in a flat bed configuration illuminated with a 100 W medium pressure mercury lamp and sunlight.
244 citations
TL;DR: The photodegradation of two common and very stable azo-dyes, i.e. methyl-orange and orange II, in aqueous suspensions of polycrystalline TiO2 irradiated by sunlight showed no more evidence of the presence of hydroxylated transients.
236 citations
TL;DR: In this article, the potential use of concentrated solar illumination as the source of irridiance in those photocatalytic systems was investigated and the influence of light intensity, temperature and pH on the overall yield of the destruction of halogenated hydrocarbons in aqueous suspensions containing titanium dioxide powder has been studied in detail.
228 citations
TL;DR: In this article, a solar photocatalytic plant for the treatment of commercial pesticide rinsates found in the wastewater produced by a pesticide container recycling plant, which includes the correct treatment of this highly contaminating effluent.
Abstract: Particulate suspensions of TiO2 irradiated with natural solar light in a large experimental plant catalyze the oxidation of a typical organic contaminant: pentachlorophenol (PCP). The addition of oxidants, concentration of which is kept constant during treatment, such as hydrogen peroxide, peroxymonosulphate (oxone) and peroxydisulphate increases the rate of photodegradation of PCP in the following order: S2O2−8>Oxone>H2O2. Peroxydisulphate (10 mM), selected as the best oxidant studied, has been applied to the development of a solar photocatalytic plant for the treatment of commercial pesticide rinsates found in the wastewater produced by a pesticide container recycling plant, which includes the correct treatment of this highly contaminating effluent. The first results, without process or hardware optimisation, show that peroxydisulphate enhances the photocatalytic mineralization rate at least five times.
213 citations