SHIRASAKI Nobutaka

J-GLOBAL         Last updated: Sep 3, 2019 at 11:14
 
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Name
SHIRASAKI Nobutaka
URL
http://www.eng.hokudai.ac.jp/labo/risk/
Affiliation
Hokkaido University
Section
Faculty of Engineering, Division of Built Environment
Job title
Assistant Professor
Degree
Doctor of Philosophy(Hokkaido University)
Research funding number
60604692

Research Areas

 
 

Academic & Professional Experience

 
2009
 - 
2010
 Postdoctoral Fellowships of Japan Society for the Promotion of Science,Hokkaido University
 

Education

 
 
 - 
2010
Division of Built Environment, Graduate School, Division of Engineering, Hokkaido University
 
 
 - 
2007
Division of Civil Engineering, Graduate School, Division of Engineering, Gifu University
 
 
 - 
2005
Department of Civil Engineering, Faculty of Engineering, Gifu University
 

Misc

 
Taku Matsushita, Wataru Sugita, Tomoya Ishikawa, Gang Shi, S. Nishizawa, Yoshihiko Matsui, Nobutaka Shirasaki
Water Research   164    Nov 2019   [Refereed]
© 2019 Elsevier Ltd 1,4-Dioxane is one of the most persistent organic micropollutants and is quite difficult to remove via conventional drinking water treatment consisting of coagulation, sedimentation, and sand filtration. Vacuum ultraviolet (VUV...
Shunto Nishikawa, Yoshihiko Matsui, Taku Matsushita, Nobutaka Shirasaki
Regulatory Toxicology and Pharmacology   106 43-49   Aug 2019   [Refereed]
© 2019 Elsevier Inc. Volatilization volumes and health risks associated with indirect inhalation exposure to formaldehyde evaporated from water have not been investigated quantitatively. We experimentally investigated formaldehyde volatility, com...
Hideki Takaesu, Yoshihiko Matsui, Yuki Nishimura, Taku Matsushita, Nobutaka Shirasaki
Water Research   155 66-75   May 2019   [Refereed]
© 2019 Elsevier Ltd Superfine powdered activated carbon (SPAC) of micron to submicron particle size is produced by micro-milling of conventionally sized powdered activated carbon. SPAC has attracted attention because of its high adsorption capacit...
Yoshifumi Nakazawa, Yoshihiko Matsui, Yusuke Hanamura, Koki Shinno, Nobutaka Shirasaki, Taku Matsushita
Water Research   147 311-320   Dec 2018   [Refereed]
© 2018 Elsevier Ltd Because of the eminent adsorptive capacity and rate for dissolved organic molecules compared to conventionally-sized powdered activated carbon (PAC), super-fine powdered activated carbon (SPAC) is gathering momentum for use in ...
Yoshifumi Nakazawa, Yoshihiko Matsui, Yusuke Hanamura, Koki Shinno, Nobutaka Shirasaki, Taku Matsushita
Water Research   138 160-168   Jul 2018   [Refereed]
© 2018 Elsevier Ltd Superfine powdered activated carbon (SPAC; particle diameter ∼1 μm) has greater adsorptivity for organic molecules than conventionally sized powdered activated carbon (PAC). Although SPAC is currently used in the pretreatment t...
Taku Matsushita, Ayako Morimoto, Taisuke Kuriyama, Eisuke Matsumoto, Yoshihiko Matsui, Nobutaka Shirasaki, Takashi Kondo, Hirokazu Takanashi, Takashi Kameya
Water Research   138 67-76   Jul 2018   [Refereed]
© 2018 Elsevier Ltd Removal efficiencies of 28 pesticide transformation products (TPs) and 15 parent pesticides during steps in drinking water treatment (coagulation–sedimentation, activated carbon adsorption, and ozonation) were estimated via lab...
Megumi Akiyama, Yoshihiko Matsui, Junki Kido, Taku Matsushita, Nobutaka Shirasaki
Regulatory Toxicology and Pharmacology   95 161-174   Jun 2018   [Refereed]
© 2018 Elsevier Inc. The probability distributions of total potential doses of disinfection byproducts and volatile organic compounds via ingestion, inhalation, and dermal exposure were estimated with Monte Carlo simulations, after conducting phys...
N. Shirasaki, T. Matsushita, Y. Matsui, R. Yamashita
Water Research   129 460-469   Feb 2018   [Refereed]
© 2017 Elsevier Ltd Here, we evaluated the removal of three representative human enteric viruses — adenovirus (AdV) type 40, coxsackievirus (CV) B5, and hepatitis A virus (HAV) IB — and one surrogate of human caliciviruses — murine norovirus (MNV)...
Taku Matsushita, Shiho Honda, Taisuke Kuriyama, Yuki Fujita, Takashi Kondo, Yoshihiko Matsui, Nobutaka Shirasaki, Hirokazu Takanashi, Takashi Kameya
Water Research   129 347-356   Feb 2018   [Refereed]
© 2017 Elsevier Ltd We used Ames assays to investigate the effects of ozonation (designated O3), ozonation followed by chlorination (O3/Cl), an advanced oxidation process (AOP, UV/H2O2), and AOP followed by chlorination (AOP/Cl) on the mutagenicit...
Taku Matsushita, Miki Sakuma, Shiori Tazawa, Taiki Hatase, Nobutaka Shirasaki, Yoshihiko Matsui
Water Research   125 332-340   Nov 2017   [Refereed]
© 2017 Elsevier Ltd Off-flavor in drinking water can be caused by transformation products (TPs) generated from organic compounds, such as amino acids, present during chlorination. However, the contributions of many of these TPs to overall off-flav...
Yoshihiko Matsui, Nobutaka Shirasaki, Takuro Yamaguchi, Kenta Kondo, Kaori Machida, Taiga Fukuura, Taku Matsushita
Water Research   118 177-186   Jul 2017   [Refereed]
© 2017 Elsevier Ltd We evaluated 51 poly-aluminum chloride (PACl) coagulants to determine the coagulant characteristics that were responsible for effective arsenate removal from contaminated river water by means of experiments involving coagulatio...
Taku Matsushita, Yoshihiko Matsui, Shohei Ikekame, Miki Sakuma, Nobutaka Shirasaki
Environmental Science and Technology   51 4541-4548   Apr 2017   [Refereed]
© 2017 American Chemical Society. Mechanisms underlying trichloramine removal with activated carbon treatment were proven by batch experiments and theoretical analysis with diffusion-reaction models. The observed values of trichloramine and free c...
N. Shirasaki, T. Matsushita, Y. Matsui, K. Murai, A. Aochi
Journal of Hazardous Materials   326 110-119   Mar 2017   [Refereed]
© 2016 Elsevier B.V. We examined the removal of representative contaminant candidate list (CCL) viruses (coxsackievirus [CV] B5, echovirus type [EV] 11, and hepatitis A virus [HAV] IB), recombinant norovirus virus-like particles (rNV-VLPs), and m...
N. Shirasaki, T. Matsushita, Y. Matsui, T. Marubayashi, K. Murai
Science of the Total Environment   576 472   Jan 2017   [Refereed]
© 2016 Elsevier B.V. The authors regret that there was an error done in Table 1 of the article. They would like to change it from “mM-Al” to “μM-Al”. Coagulant dosage at sampling day (mM-Al) → “mM” (millimole) is an error and “μM” (micromole) is t...
Long Pan, Yuki Nishimura, Hideki Takaesu, Yoshihiko Matsui, Taku Matsushita, Nobutaka Shirasaki
Water Research   124 425-434   Jan 2017   [Refereed]
© 2017 Elsevier Ltd The capacity of activated carbon particles with median diameters (D50s) of > ∼1 μm for adsorption of hydrophobic micropollutants such as 2-methylisolborneol (MIB) increases with decreasing particle size because the pollutants ...
N. Shirasaki, T. Matsushita, Y. Matsui, K. Murai
Water Research   115 29-39   Jan 2017   [Refereed]
© 2017 Elsevier Ltd Here, we evaluated the efficacy of direct microfiltration (MF) and ultrafiltration (UF) to remove three representative human enteric viruses (i.e., adenovirus [AdV] type 40, coxsackievirus [CV] B5, and hepatitis A virus [HAV] ...
Long Pan, Yuichi Takagi, Yoshihiko Matsui, Taku Matsushita, Nobutaka Shirasaki
Water Research   114 50-58   Jan 2017   [Refereed]
© 2017 Elsevier Ltd We milled granular activated carbons (GACs) that had been used for 0–9 years in water treatment plants and produced carbon particles with different sizes and ages: powdered activated carbons (PAC, median diameter 12–42 μm), sup...
Long Pan, Yoshihiko Matsui, Taku Matsushita, Nobutaka Shirasaki
Water Research   102 516-523   Oct 2016   [Refereed]
© 2016 Elsevier Ltd Superfine powdered activated carbon (SPAC), which is produced from conventionally sized powdered activated carbon (PAC) by wet milling in a bead mill, has attracted attention for its high adsorptive removal ability in both rese...
N. Shirasaki, T. Matsushita, Y. Matsui, T. Marubayashi, K. Murai
Science of the Total Environment   563-564 29-39   Sep 2016   [Refereed]
© 2016 Elsevier B.V. We evaluated the removal of enteric adenovirus (AdV) type 40 and poliovirus (PV) type 1 by coagulation, using water samples from 13 water sources for drinking water treatment plants in Japan. The behaviors of two widely accept...
Nobutaka Shirasaki, Taku Matsushita, Yoshihiko Matsui, Takuya Marubayashi
Journal of Water Supply: Research and Technology - AQUA   65 322-329   Jun 2016   [Refereed]
© IWA Publishing 2016. We investigated the effect of coagulant basicity on bacteriophage removal from river water by polyferric chloride (PFC). PFC at three basicities (basicity 0.9-2.1) was prepared by means of base titration (NaOH was added to f...
N. Shirasaki, T. Matsushita, Y. Matsui, K. Ohno
Water Science and Technology: Water Supply   16 737-745   Jun 2016   [Refereed]
© IWA Publishing 2016. Noroviruses (NVs) are one of the leading causes of epidemic gastroenteritis around the world. Water treatment technologies using membrane filtration for virus removal are becoming increasingly important. However, experiments...
Taku Matsushita, Masahiro Hashizuka, Taisuke Kuriyama, Yoshihiko Matsui, Nobutaka Shirasaki
Chemosphere   148 233-240   Apr 2016   [Refereed]
© 2016 Elsevier Ltd. The effects of two water purification processes (ozonation, and chlorination after ozonation) on the mutagenicity of a solution containing iopamidol (X-ray contrast medium) were investigated by using the Ames assay. No mutagen...
N. Shirasaki, T. Matsushita, Y. Matsui, T. Marubayashi
Chemical Engineering Journal   284 786-793   Jan 2016   [Refereed]
© 2015 Elsevier B.V. We prepared different types of aluminum-based coagulants, consisting of mainly monomeric aluminum species, polymeric aluminum species, or colloidal aluminum species, to investigate the effect of aluminum hydrolyte species on t...
Yoshihiko Matsui, Soichi Nakao, Asuka Sakamoto, Takuma Taniguchi, Long Pan, Taku Matsushita, Nobutaka Shirasaki
Water Research   85 95-102   Nov 2015   [Refereed]
© 2015 Elsevier Ltd. The adsorption capacities of nine activated carbons for geosmin and 2-methylisoborneol (MIB) were evaluated. For some carbons, adsorption capacity substantially increased when carbon particle diameter was decreased from a few ...
Masaoki Kimura, Yoshihiko Matsui, Shun Saito, Tomoya Takahashi, Midori Nakagawa, Nobutaka Shirasaki, Taku Matsushita
Journal of Membrane Science   477 115-122   Mar 2015   [Refereed]
© 2014 Elsevier B.V. The extent of hydraulically irreversible membrane fouling in a coagulation-filtration system depends on several factors, including properties of the coagulant. Effects of polyaluminum chloride (PACl) coagulant properties, spec...
Mariya Ikari, Yoshihiko Matsui, Yuta Suzuki, Taku Matsushita, Nobutaka Shirasaki
Water Research   68 227-237   Jan 2015   [Refereed]
© 2014 Elsevier Ltd. Chlorine oxidation followed by treatment with activated carbon was studied as a possible method for removing radioactive iodine from water. Chlorination time, chlorine dose, the presence of natural organic matter (NOM), the pr...
Miki Sakuma, Taku Matsushita, Yoshihiko Matsui, Tomoko Aki, Masahito Isaka, Nobutaka Shirasaki
Water Research   68 839-848   Jan 2015   [Refereed]
© 2014 Elsevier Ltd. This study investigated the mechanism by which activated carbon removes trichloramine, a byproduct of water treatment that has a strongly offensive chlorinous odor. A stoichiometrical mass balance for 15N before and after acti...
Taku Matsushita, Keisuke Nakamura, Yoshihiko Matsui, Nobutaka Shirasaki
Membrane Water Treatment   6 225-235   Jan 2015   [Refereed]
© 2015 Techno-Press, Ltd. During low-pressure membrane treatments of cyanobacterial cells, including microfiltration (MF) and ultrafiltration (UF), there have reportedly been releases of intracellular compounds including cyanotoxins and compounds ...
T. Matsushita, S. Hirai, T. Ishikawa, Y. Matsui, N. Shirasaki
Process Safety and Environmental Protection   94 528-541   Jan 2015   [Refereed]
© 2014 The Institution of Chemical Engineers. We report the first use of vacuum ultraviolet (VUV) treatment to decompose 1,4-dioxane, a persistent organic contaminant that is difficult to remove by conventional drinking water treatment processes. ...
Taku Matsushita, Nozomi Kobayashi, Masahiro Hashizuka, Haruki Sakuma, Takashi Kondo, Yoshihiko Matsui, Nobutaka Shirasaki
Chemosphere   135 101-107   Jan 2015   [Refereed]
© 2015 Elsevier Ltd. In the present study, the effects of chlorination on the mutagenicity (assessed via the Ames assay) and acute toxicity (assessed via a bioluminescence inhibition assay) of solutions containing one of five commonly used iodinat...
N. Shirasaki, T. Matsushita, Y. Matsui, T. Urasaki, M. Kimura, K. Ohno
Water Science and Technology: Water Supply   14 429-437   Jan 2014   [Refereed]
The ability of in-line coagulation pretreatment with high-basicity polyaluminum chloride (PACl) coagulants to enhance virus removal by ceramic microfiltration (MF) was examined by comparing virus removal efficiencies from water pretreated with PAC...
Kentaro Narita, Yoshihiko Matsui, Kensuke Iwao, Motoyuki Kamata, Taku Matsushita, Nobutaka Shirasaki
Environment International   63 114-120   Jan 2014   [Refereed]
Pesticides released into the environment may pose both ecological and human health risks. Governments set the regulations and guidelines for the allowable levels of active components of pesticides in various exposure sources, including drinking wa...
Yoshihiko Matsui, Asuka Sakamoto, Soichi Nakao, Takuma Taniguchi, Taku Matsushita, Nobutaka Shirasaki, Naoya Sakamoto, Hisayoshi Yurimoto, Hisayoshi Yurimoto
Environmental Science and Technology   48 10897-10903   Jan 2014   [Refereed]
© 2014 American Chemical Society. Decreasing the particle size of powdered activated carbon may enhance its equilibrium adsorption capacity for small molecules and micropollutants, such as 2-methylisoborneol (MIB) and geosmin, as well as for macro...
N. Shirasaki, T. Matsushita, Y. Matsui, A. Oshiba, T. Marubayashi, S. Sato
Water Research   48 375-386   Jan 2014   [Refereed]
We investigated the effects of basicity, sulfate content, and aluminum hydrolyte species on the ability of polyaluminum chloride (PACl) coagulants to remove F-specific RNA bacteriophages from river water at a pH range of 6-8. An increase in PACl b...
Yoshihiko Matsui, Tairyo B. Ishikawa, Masaoki Kimura, Kaori Machida, Nobutaka Shirasaki, Taku Matsushita
Separation and Purification Technology   119 58-65   Oct 2013   [Refereed]
The residual aluminum concentration in treated water after aluminum coagulation and solid-liquid separation is one of the key factors in evaluating the effectiveness of water treatments. Polymeric membrane filters have been widely used to operatio...
Shun Niizuma, Yoshihiko Matsui, Koichi Ohno, Sadahiko Itoh, Taku Matsushita, Nobutaka Shirasaki
Regulatory Toxicology and Pharmacology   67 98-107   Oct 2013   [Refereed]
Drinking water quality standard (DWQS) criteria for chemicals for which there is a threshold for toxicity are derived by allocating a fraction of tolerable daily intake (TDI) to exposure from drinking water. We conducted physiologically based phar...
Taku Matsushita, Nobutaka Shirasaki, Yuichi Tatsuki, Yoshihiko Matsui
Water Research   47 5819-5827   Oct 2013   [Refereed]
The removal of microorganisms by drinking water treatment processes has been widely investigated in laboratory-scale experiments using artificially propagated microorganisms. However, this approach cannot be applied to norovirus removal, because t...
Masaoki Kimura, Yoshihiko Matsui, Kenta Kondo, Tairyo B. Ishikawa, Taku Matsushita, Nobutaka Shirasaki
Water Research   47 2075-2084   Apr 2013   [Refereed]
Aluminum coagulants are widely used in water treatment plants to remove turbidity and dissolved substances. However, because high aluminum concentrations in treated water are associated with increased turbidity and because aluminum exerts undeniab...
Taku Matsushita, Hideaki Suzuki, Nobutaka Shirasaki, Yoshihiko Matsui, Koichi Ohno
Separation and Purification Technology   107 79-84   Feb 2013   [Refereed]
We investigated the removal of bacteriophages by adsorption on commercially available powdered activated carbon (N-PAC, median diameter >10 μm) and super-powdered activated carbon (S-PAC, median diameter 0.7-2.8 μm). N-PACs failed to remove the vi...
N. Shirasaki, T. Matsushita, Y. Matsui, T. Urasaki, K. Ohno
Water Science and Technology: Water Supply   12 666-673   Oct 2012   [Refereed]
Difference in behaviors of F-specific DNA and RNA bacteriophages during coagulation-rapid sand filtration and coagulation-microfiltration (MF) processes were investigated by using river water spiked with F-specific DNA bacteriophage f1 and RNA bac...
Taku Matsushita, Nobutaka Shirasaki, Yoshihiko Matsui, Koichi Ohno
Chemosphere   85 571-576   Oct 2011   [Refereed]
We used the bacteriophages Qβ and MS2 to determine whether viruses are inactivated by aluminum coagulants during the coagulation process. We performed batch coagulation and filtration experiments with virus-containing solutions. After filtering th...
Nobutaka Shirasaki, Taku Matsushita, Yoshihiko Matsui, Makoto Kobuke, Koichi Ohno
Journal of Water Supply: Research and Technology - AQUA   59 501-511   Dec 2010   [Refereed]
The feasibility of in-line coagulation as a pretreatment for ceramic microfiltration (MF) was verified by comparing its efficiency in the removal of viruses with that of the traditional mechanical mixing approach for coagulation, and by examining ...
N. Shirasaki, T. Matsushita, Y. Matsui, T. Urasaki, A. Oshiba, K. Ohno
Water Science and Technology   61 2027-2034   Jul 2010   [Refereed]
Norovirus (NV) is a prototype strain of a group of human caliciviruses responsible for epidemic outbreaks of acute gastroenteritis worldwide. Because of the lack of a cell culture system or an animal model for this virus, studies on drinking water...
N. Shirasaki, T. Matsushita, Y. Matsui, A. Oshiba, K. Ohno
Water Research   44 1307-1316   Mar 2010   [Refereed]
Norovirus (NV) is an important human pathogen that causes epidemic acute nonbacterial gastroenteritis worldwide. Because of the lack of a cell culture system or an animal model for this virus, studies of drinking water treatment such as separation...
N. Shirasaki, T. Matsushita, Y. Matsui, T. Urasaki, K. Ohno
Water Research   43 605-612   Feb 2009   [Refereed]
Differences in the behaviors of two surrogates for pathogenic waterborne viruses, F-specific RNA bacteriophages Qβ and MS2, were investigated during the coagulation process by using river water spiked with these bacteriophages. The particle size a...
N. Shirasaki, T. Matsushita, Y. Matsui, M. Kobuke, K. Ohno
Journal of Membrane Science   326 564-571   Jan 2009   [Refereed]
The removal performance of two surrogates for pathogenic waterborne viruses, F-specific RNA bacteriophages Qβ and MS2, was evaluated during the coagulation-ceramic microfiltration process. River water spiked with these bacteriophages was used to i...
Nobutaka Shirasaki, Taku Matsushita, Yoshihiko Matsui, Koichi Ohno
Journal of Water Supply: Research and Technology - AQUA   57 501-506   Nov 2008   [Refereed]
We evaluated the removal of virus (bacteriophage Qβ) after hydraulic backwashing and the effects of reversible and irreversible membrane fouling on virus removal by a coagulation-microfiltration (MF) system. The rate of virus removal in the coagul...
N. Shirasaki, N. Shirasaki, T. Matsushita, Y. Matsui, K. Ohno, M. Kobuke
Water Science and Technology: Water Supply   7 1-8   Dec 2007   [Refereed]
Virus removal performance and mechanisms were investigated in a hybrid coagulation - microfiltration (MF) system by using river water spiked with bacteriophage Qβ. Virus removal increased with filtration time: the rate of virus removal was 4 log a...
Taku Matsushita, Y. Matsui, N. Shirasaki
Water Science and Technology   53 199-207   Jun 2006   [Refereed]
Virus removal experiments using river water spiked with bacteriophages were conducted by an inline coagulation-ceramic microfiltration hybrid system to investigate the effects of filtration flux (62.5 and 125 L/ (m2 × h)) and type of virus (Qβ and...
Taku Matsushita, Y. Matsui, N. Shirasaki, Y. Kato
Desalination   178 21-26   Jul 2005   [Refereed]
We studied virus removal from spiked river water by an in-line coagulation-ceramic microfiltration hybrid system to investigate the effects of (1) coagulant dose (0.54, 1.08, and 1.62 mg Al/L), (2) pore size of the MF membrane (0.1, 0.5, and 1.0 μ...