A5018182513- Membrane Separation Technologies
- Membrane-based Ion Separation Techniques
- Wastewater Treatment and Nitrogen Removal
- Molecular Sensors and Ion Detection
- Phosphorus and nutrient management
- Aquatic Ecosystems and Phytoplankton Dynamics
- Anaerobic Digestion and Biogas Production
- Luminescence and Fluorescent Materials
- Microplastics and Plastic Pollution
- Electrohydrodynamics and Fluid Dynamics
- Advanced biosensing and bioanalysis techniques
- Soil and Water Nutrient Dynamics
- Environmental Chemistry and Analysis
- Adsorption and biosorption for pollutant removal
- Analytical chemistry methods development
- Recycling and Waste Management Techniques
- Minerals Flotation and Separation Techniques
- Coagulation and Flocculation Studies
- Analytical Chemistry and Sensors
- Wastewater Treatment and Reuse
- biodegradable polymer synthesis and properties
- Water Treatment and Disinfection
- Layered Double Hydroxides Synthesis and Applications
- Dielectric materials and actuators
- Extraction and Separation Processes
Hokkaido University
2010-2025
National Institute for Environmental Studies
2018-2019
Chuo University
2014-2018
In coagulation-membrane filtration water treatment processes, it is still difficult to determine the optimal coagulation condition minimize irreversible membrane fouling. microfiltration (MF), meso-particles (i.e., 20 nm-0.5 μm) are thought play an important role in fouling, especially their characteristics of particle number (PN) and zeta potential (ZP). this study, a new nanoparticle tracker combined high-output violet laser with microscope was developed identify physicochemical these...
Simple analytical methods are needed for determining the cadmium (Cd) content of brown rice samples. In present study, we developed a new procedure consisting digestion using HCl, Cd purification anion exchange resin, and then fluorescence spectroscopy. Digestion with 0.1 M HCl 10 min at room temperature was sufficient to extract from ground The in successfully purified preference other metals Dowex 1X8 chloride form resin. Low concentrations eluate could be determined spectroscopy...
High-rate processes have been investigated for the recovery of organic matter from municipal wastewater. membrane bioreactors (HR-MBRs) may simultaneously achieve increased carbon and high effluent quality, although control fouling is extremely difficult. To address severe in HR-MBRs, combination granular scouring frequent chemically enhanced backwashing was examined. The use robust flat-sheet ceramic membranes enabled application those cleaning strategies. Experiments were carried out at an...
We investigated the adsorption characteristics of geosmin and 2-methylisoborneol (MIB) on graphene oxide (GO) in absence presence natural organic matter (NOM). The had fast kinetics for both compounds because its open-layered structure, with equilibrium being achieved within 15 min contact. Although NOM did not affect GO, it delayed that MIB, probably competition sites. isotherms show GO a greater capacity than MIB was more hydrophobic. Moreover, interfered onto but increased amount adsorbed...
Abstract Two novel asymmetric BODIPY fluoroionophores with dipicolylamine (BDP-DPA, dipicolylamine: bis(pyridylmethyl)) and terpyridine (BDP-TPY) are described. These display opposite wavelength responses on complexation heavy metal ions. Furthermore, the fluorescence spectra vary depending ionic species. In particular, BDP-DPA shows a high affinity toward Cr3+ upon complexation, spectrum blue-shifts from 591 to 566 nm. contrast, BDP-TPY preferentially binds Zn2+ red-shifts 539 567 is first...
Abstract In this paper, we investigated the effects of substitution at 5-position an asymmetric BODIPY cation sensor to tune its spectroscopic, photophysical, and cation-sensing properties. We introduced substituent groups with differing electron density 3-[bis(pyridine-2-ylmethyl)amino]-BODIPY, which contains a recognition moiety 3-position core, develop four sensors all exhibited distinctive ratiometric spectral changes in presence Cu2+. Aromatic increased Stokes shift. Substitution...