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Decolorization of Orange Ⅱ using an anaerobic sequencing batch reactor with and without co-substrates

Journal of Environmental Sciences 2012年第2期24卷 291-296页

作者： Soon-An Ong eiichi toorisaka Makoto Hirata Tadashi Hano Department of Applied Chemistry OitaUniversity School of Environmental Engineering University Malaysia Perlis

We investigated the decolorization of Orange Ⅱ with and without the addition of co-substrates and nutrients under an anaerobic sequencing batch reactor（ASBR）.The increase in COD concentrations from 900 to 1750 to 3730 mg/L in the system treating 100 mg/L of Orange Ⅱ-containing wastewater enhanced color removal from 27% to 81% to 89%,*** the absence of co-substrates and nutrients,more than 95% of decolorization was achieved by the acclimatized anaerobic microbes in the bioreactor treating 600 mg/L of Orange Ⅱ.The decrease in mixed liquor suspended solids concentration by endogenous lysis of biomass preserved a high reducing environment in the ASBR,which was important for the reduction of the Orange Ⅱ azo bond that caused *** maximum decolorization rate in the ASBR was approximately 0.17 g/hr in the absence of co-substrates and nutrients.

关键词： anaerobic reduction azo dye decolorization rate endogenous lysis Orange Ⅱ

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Combination of adsorption and biodegradation processes for textile effluent treatment using a granular activated carbon-biofilm configured packed column system

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Journal of Environmental Sciences 2008年第8期20卷 952-956页

作者： ONG SoonAn toorisaka eiichi HIRATA Makoto HANO Tadashi Department of Applied Chemistry Oita UniversityOita 870-1192Japan.School of Environmental EngineeringUniversity Malaysia PerilsPerlis 02700Malaysia Department of Applied Chemistry Oita UniversityOita 870-1192Japan

The objective of this study was to investigate the feasibility of using a granular activated carbon-biofilm configured packed column system in the deeolodzation of azo dye Acid Orange 7-containing *** Acid Orange 7-degrading microbial from anaerobic sequencing batch reactor which treating the azo dye-containing wastewater for more than 200 d was immobilized on spent granular activated carbon(GAC)through *** GAC-biofilm configured packed column system showed the ability to decolorize 10...

关键词： granular activated carbon(GAC) color removal Acid Orange 7 azo dye immobilization

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Development of Fine Poly(D,L-Lactic-Co-Glycolic Acid) Particles for Hydrophilic Drug Using a Solid-in-Oil-in-Water Emulsion

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Journal of Encapsulation and Adsorption Sciences 2018年第2期8卷 58-66页

作者： eiichi toorisaka Kikumi Watanabe Makoto Hirata Department of Environmental Science and Engineering Yamaguchi University Yamaguchi Japan Department of Applied Chemistry Oita University Oita Japan

Poly(D,L-Lactic-Co-Glycolic Acid) (PLGA) copolymers have been extensively used as controlled-release carriers for many hydrophilic drugs because they are non-toxic, biodegradable, bioavailable, and biocompatible. In general, PLGA particles have been produced by a solvent evaporation technique utilizing water-in-oil-in-water (W/O/W) emulsions. However, W/O/W emulsions are unstable, causing the outer and inner aqueous phases to easily fuse during particle preparation. Consequently, a sufficient amount of drug was not encapsulated inside the particles. In this study, we examined a new particle preparation method utilizing a solid-in-oil-in-water (S/O/W) emulsion technique. The advantages of S/O/W emulsions, wherein a surfactant-drug complex disperses into the oil phase, were as follows: 1) leakage of hydrophilic drugs from the emulsions was inhibited, and 2) facile control over the emulsion particle size. Thus, the PLGA particles prepared by this method showed high encapsulation efficiency of drugs and formation of fine particles of submicron size by membrane emulsification were achieved.

关键词： PLGA Hydrophilic drugs S/O/W Emulsions Solvent Evaporation

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Preparation of Hollow Calcium Silicate Microparticles by Simple Emulsion

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Journal of Encapsulation and Adsorption Sciences 2014年第4期4卷 114-121页

作者： eiichi toorisaka Syotaro Nagamatsu Yasunobu Saruwatari Makoto Hirata Tadashi Hano Department of Environmental Science and Engineering Yamaguchi University Yamaguchi Japan Department of Applied Chemistry Oita University Oita Japan

Hollow calcium silicate microparticles were prepared by mixing a water-in-oil (W/O) emulsion containing silicate ions in aqueous phase with an oil phase containing a calcium/di-2-ethylhexyl phosphoric acid (D2EHPA) complex. The inorganic precipitation reaction at the oil-water interface was accelerated by using a simple W/O emulsion. Hollow microparticles were obtained when the mole ratio of D2EHPA and calcium in the oil phase was nearly 2:1. The shell formation of the par-ticles depended on the acceleration of the precipitation reaction, which could be accomplished by controlling the concentrations of the calcium and silicate ions.

关键词： Hollow Inorganic Microparticle Water-in-Oil Emulsion Solvent Extraction Interfacial Reaction

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