Hokkaido University · Environmental Science
Professor Yoshihiko Matsui's research lab specializes in environmental engineering, with a focus on water treatment technologies and the removal of contaminants from water. Key research directions include the coagulation and adsorption processes for micro-pollutants such as viruses, pesticides, and synthetic organic chemicals, particularly in the presence of natural organic matter. The lab investigates advanced materials like granular activated carbon and polyaluminum chloride (PACl) to optimize removal efficiency and understand underlying mechanisms at the molecular and colloidal levels. Their work also extends to innovative applications such as plasma-based fuel reformation for sustainable energy conversion.
Figures are computed from collected data and may differ slightly.
Inorganic aluminum salts, such as aluminum sulfate, are coagulants that cause small particles, such as bacteria and viruses as well as inorganic particles, to destabilize and combine into larger aggregates. In this investigation, batch coagulation treatments of water samples spiked with Qbeta, MS2, T4, and P1 viruses were conducted with four different aluminum coagulants. The total infectious virus concentration in the suspension of floc particles that eventually formed by dosing with coagulant
Research Article| May 01 2001 Invasion of the non-indigenous nuisance mussel, Limnoperna fortunei, into water supply facilities in Japan Yasumoto Magara; Yasumoto Magara 1Division of Urban and Environmental Engineering, Hokkaido University, N13W8, Sapporo 060-8628, Japan Search for other works by this author on: This Site PubMed Google Scholar Yoshihiko Matsui; Yoshihiko Matsui 2Department of Civil Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan Tel: +81-58-293-2429 Fax: +81-58-
The adsorptive removal of periodic spikes of the trace synthetic organic chemicals (SOCs) simazine and asulam from water containing natural organic matter (NOM) was studied in pilot-scale granular activated carbon (GAC) adsorbers over a period of nearly 3 years. The SOC removal percentage obtained at any preloading time and bed depth was independent of the liquid-phase SOC concentration, and equations derived from the ideal adsorbed solution theory and a pore surface diffusion model validated th
The principal objective of this study was to elucidate mechanisms by which NOM affects the adsorption of a nonpolar (simazine) and a polar (asulam) herbicide on activated carbon. Experiments were carried out in microcolumns that were continuously fed solutions containing NOM with different molecular weight (MW) distributions and intermittently solutions containing the same NOM plus simazine or asulam. The MW distributions of a groundwater NOM were altered by coagulation and ultrafiltration, whic
PACl more effectively coagulates fine particles than alum. The coagulation kinetics of polyaluminum chloride (PACl) and alum applied to kaolin clay suspensions were compared in batch experiments. Increasing aluminum (Al) dosages reduced the time required for particles destabilization and increased the rate at which the number of primary particles decreased. PACl worked faster than alum. Photometric dispersion analysis showed that increasing Al dosages decreased the time required for floc to form
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