Nobuyasu Hanari

National Institute of Advanced Industrial Science and Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Nobuyoshi Yamashita

National Institute of Advanced Industrial Science and Technology

Sachi Taniyasu

National Institute of Advanced Industrial Science and Technology

Yuichi Horii

Center for Environmental Science in Saitama

Jerzy Falandysz

Medical University of Lodz

Masahiko Numata

National Institute of Advanced Industrial Science and Technology

Nobuyasu Itoh

National Institute of Advanced Industrial Science and Technology

Takashi Yarita

Tokyo University of Agriculture and Technology

Takamitsu Otake

National Institute of Advanced Industrial Science and Technology

Keiichiro Ishikawa

National Institute of Advanced Industrial Science and Technology

Ryoko Iwasawa

National Institute of Advanced Industrial Science and Technology

Cooperative Institutions

National Institute of Advanced Industrial Science and Technology

Japan Advanced Institute of Science and Technology

New York State Department of Health

Wadsworth Center

University at Albany, State University of New York

The University of Tokyo

City University of Hong Kong

University of Gdańsk

National Institute for Environmental Studies

Michigan State University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Water content variation of p-n-heptylphenol reference material

Accreditation and Quality Assurance (2010)

Nobuyasu Hanari Ryoko Iwasawa Satoko Otsuka Naomi Fujiki Ayako Matsumoto

Ampoule

10.1007/s00769-010-0714-5

Cite

Citations (7)

Biochar from paddy field - A solution to reduce PFAS pollution in the environment

Chemosphere (2024)

Nobuyoshi Yamashita Eriko Yamazaki Sachi Taniyasu Nobuyasu Hanari Leo W.Y. Yeung

Generally, activated carbons demonstrated a notable ability to capture long-chain PFAS, but exhibited relatively lower effectiveness for short-chain PFAS. Thirteen commercially available activated carbons in Japan underwent testing for their adsorption capacity of PFAS in water. The activated carbon derived from rice husk, Triporous™-PFAS, exhibited the highest adsorption capacity (over 95%) for PFAS from ultrashort-chain (perfluorocarbon chain: C1 for perfluorocarboxylic acid (PFCA) and C2 for perfluoroalkane sulfonic acid (PFSA)) to long-chain PFAS (C13 for PFCA and C10 for PFSA). An earlier lysimeter study highlighted Andosol, representative soil in Japan, as a potential medium for removing PFAS from irrigation water. Considering cultivating rice on Andosol fields and producing biochar from rice husks and rice straw, a new rice cultivation system is proposed. This system aims to facilitate continuous removal of PFAS from the environment in Asia. Japanese rice cultivation system produces not only rice but also biochar to remove PFAS from water circulation system. The total fluorine content in the tested activated carbon materials ranged from 0.18 to 38 μg g−1 F. Based on the results from background F blank and adsorption capacity, TriporousTM-PFAS-F was shown to be an option to lower the method detection limit for a proposed international standard method for measuring total PFAS.

Paddy field

10.1016/j.chemosphere.2024.143073

Cite

Citations (2)

Effect of Long-time Heating for Elements from Flame Retardants in Acrylonitrile Butadiene Styrene and Polycarbonate Resin Disks

Analytical Sciences (2018)

Masaki Ohata Toshihiro Kidokoro Takamitsu Otake Nobuyasu Itoh Nobuyasu Hanari

The effect of long-time heating for elements from flame retardants (FRs) such as dechlorane plus (DP), tetrabromobisphenol A (TBBPA), triphenyl phosphate (TPhP) and antimony trioxide (Sb2O3) in both acrylonitrile-butadiene-styrene (ABS) and polycarbonate (PC) resin disks was examined in the present study. The heating temperature by a drying oven was 80°C, which was expected to be a harder environment than that of usual dump site to discard electric and electronic equipment, and the long-time heating was carried out for up to 722 days. As a result, the increases for both ether (C-O-C) and ketone (C=O) groups and the decrease of C=C double bond as well as methylene group (=CH2) were found for an ABS resin disk by fourier transform infrared (FTIR) spectrometry, which was expected to result in an increase of mass of the disk up to ca. 4% due to oxidation during the long-time heating. The changes in concentrations for bromine (Br), chlorine (Cl), phosphorous (P) and Sb, which were originated elements from FRs contained, were also evaluated by energy dispersive X-ray fluorescence (ED-XRF) spectrometry and the decreases in concentrations of ca. 5% in ABS resin disk were observed which could be almost explained by increasing ca. 4% mass of the disk. On the contrary, the mass and chemical form of a PC resin disk as well as the concentrations of elements contained did not change during the long-time heating. From these results, it could be considered that most of the elements from DP, TBBPA, TPhP and Sb2O3 contained as FRs in the ABS and PC resin disks examined in the present study were not lost during the long-time heating, even though the color, shape, mass and chemical form of ABS resin disk were changed.

Triphenyl phosphate

Tetrabromobisphenol A

Polycarbonate

Antimony trioxide

Molybdenum trioxide

10.2116/analsci.18p221

Cite

Citations (1)

Nationwide Distribution of Per- and Polyfluoroalkyl Substances (Pfas) in Road Dust from India

Eriko Yamazaki Dipa Lalwani Yuefei Ruan Sachi Taniyasu Nobuyasu Hanari

In India, information on the occurrence and distribution of legacy and emerging per- and polyfluoroalkyl substances (PFAS) is deficient. In the present study, nationwide 79 road dust samples were collected from 12 states and 1 union territory for the analysis of 34 PFAS. Overall, total concentrations of 21 quantified PFAS (∑21PFAS) ranged 23−861 pg/g (median: 116 pg/g), with perfluorooctane sulfonic acid (PFOS) being predominant (median: 19.9 pg/g). Short to long chain perfluoroalkyl carboxylic acids (PFCAs; C4−C18) were detected in the majority of samples, where the concentrations of PFAS decreased with the increase in PFAS carbon chain length. ∑21PFAS was highest in road dust from urban area (n = 27; median: 230 pg/g), followed by suburban (n = 21; median: 126 pg/g) and rural areas (n = 31; median: 76 pg/g), suggesting environmental impacts of industriallization and urbanization on PFAS distribution. PFAS composition in rural road dust was significantly different from those in suburban and urban samples (p < 0.01). Regarding 4 geographical regions of India, PFAS in road dust showed spatial difference where higher concentrations were found in South India compared to other regions. ∑21PFAS were positively associated with city-wise population of India (r = 0.40, p < 0.01). Strong to moderate positive correlation was observed between ∑21PFAS, fluorotelomer sulfonic acids, and PFCAs (r = 0.23, 0.30, and 0.28, respectively; p < 0.05) and the total state-wise vehicles in India, suggesting that vehicles exhaust or non-exhaust (e.g., vehicle tyre debris and polishing material) might contribute to the PFAS occurrence in Indian road dust. Toddlers (2−5 years) had the highest estimated daily intake of ∑PFAS via road dust ingestion under average-case and worst-case scenarios (0.55 and 1.16 pg/kg bw/day, respectively).

Road dust

10.2139/ssrn.4399298

Cite

Citations (0)

Reliable Evaluation of the Lateral Resolution of a Confocal Raman Microscope by Using the Tungsten-dot Array Certified Reference Material

Analytical Sciences (2020)

Nobuyasu Itoh Nobuyasu Hanari

Confocal Raman microscopes are widely used in various applications because they provide physical and chemical information at a submicron scale. A high lateral resolution in the confocal Raman microscope is essential for obtaining high-quality images. We used an array of tungsten dots at a 600 nm pitch on a Si substrate of the certified reference material (NMIJ CRM 5207-a) to reliably evaluate the lateral resolution of a confocal Raman microscope at various pinhole sizes. The precision of the mapping scale in the x- and y-pitches was confirmed from Si signal profiles, and the lateral resolution was evaluated by a straight-edge method using scale indicators in the reference material. Because these procedures are applicable to other confocal Raman microscopes with popular specifications (532 nm laser, 100× objective lens, numerical aperture 0.9, step size 0.1 μm), they are suitable for both a reliable evaluation of the lateral resolution of a confocal Raman microscope and for daily checks on the precision of its mapping scale.

Raman microscope

10.2116/analsci.20p046

Cite

Citations (3)

Residue Distribution and Daily Exposure of Per- and Polyfluoroalkyl Substances in Indica and Japonica Rice

Environmental Science & Technology (2023)

Eriko Yamazaki Heesoo Eun Sachi Taniyasu Toshihiro Sakamoto Nobuyasu Hanari

Per- and polyfluoroalkyl substances (PFAS) have excellent chemical stability but have adverse environmental impacts of concern. Furthermore, bioaccumulation of PFAS in rice varieties─which is the essential staple food crop in Asia─has not been verified. Therefore, we cultivated Indica (Kasalath) and Japonica rice (Koshihikari) in the same Andosol (volcanic ash soil) paddy field and analyzed the air, rainwater, irrigated water, soil, and rice plants for 32 PFAS residues, throughout the cultivation to human consumption. During the rice cultivation period, the cultivation environment in atmospheric particulate matter (PM) constituted perfluoroalkyl carboxylic acids (PFCAs), with minimal perfluorinated sulfonic acids (PFSAs). Furthermore, perfluorooctanesulfonic acid (PFOS) migrates at a PM > 10 to drop in a cultivation field and was conducive to leakage and accumulation of PFCAs in air particles in the field environment. Moreover, precipitation was a sources of irrigation water contamination, and cultivated soil with a high carbon content could capture PFSAs and PFCAs (over C10). There were no major differences in residual PFAS trends in the rice varieties, but the distribution of PFAS in the growing soil, air, and rainwater differed. The edible white rice part was mainly affected by irrigation water in both varieties. Monte Carlo simulations of daily exposure assessments of PFOS, PFOA, and perfluorononanic acid showed similar results for Indians consuming Indica rice and Japanese consuming Japonica rice. The results indicate that the ultratrace PFAS residue concentrations and their daily exposure were not cultivar-specific.

Paddy field

10.1021/acs.est.2c08767

Cite

Citations (18)

Development of analytical method for PBDEs and PBDDs/DFs in environmental matrices and some chemical formulations

Nobuyasu Hanari Tsuyoshi Okazawa Nobuyoshi Yamashita Keerthi S. Guruge Jerzy Falandysz

Brominated flame retardants (BFRs) are environmentally and toxicologically hazardous compounds amongst many of chemicals used to reduce inherent fire hazards in a variety of goods. Polybrominated diphenyl ethers (PBDEs) are widely used flame retardants in textile and plastic materials and their content can be up to 10-30% of the product weight as is found for polyurethane foams. The technical PBDE products become available at the market as pentaBDE, octaBDE and decaBDE formulation. A combustion of the wastes containing PBDEs as well as thermal destruction of other BFR-containing materials may lead to the formation of another and considered to be highly toxic compounds such as polybrominated dibenzo-p-dioxins (PBDDs) and dibenzofurans (PBDFs). Some of PBDE congeners were found to be liable for debromination and photodegradation under a real environmental condition but also during chemical laboratory analysis. Additionally, co-occurrence of PBDDs/DFs and PBDEs can cause interferences during quantitative analysis of PBDFs when using HRGC/HRMS. The objective of this study was to develop a method of perfect separation of PBDDs/DFs from PBDEs and their congener-specific determination using HRGC/HRMS but also to optimize quantification of BDE 209 in environmental samples.

Chlorinated paraffins

Congener

Source

Cite

Citations (1)

Concentrations and Fluxes of Chloronaphthalenes in Sediment from Lake Kitaura in Japan in Past 15 Centuries

Journal of Environmental Science and Health Part A (2004)

Yuichi Horii Jerzy Falandysz Nobuyasu Hanari Paweł Rostkowski Tomasz Puzyn

The concentrations of 63 congeners of chloronaphthalene (CN; polychlorinated naphthalenes, PCNs) in dated on approximately 500 B.C. to 2000 sediment core from the Lake Kitaura in Japan have been quantified by HRGC/HRMS after double column HPLC fractionation. Sediment from the Lake Kitaura showed a time-dependent pattern in distribution of CNs since the approximately 500 B.C. Starting from the 1910s the total CNs content increased accelerating from the 1960s, and, in parallel, the pattern of CN congeners has changed with a substantial increase in contribution from the penta, hexa, hepta, and octaCN. The total CNs content normalized to dry weight of sediment peaked out in the layer dated on 1984-1985, and next nearly two-fold decreased with further gradually decreasing concentration in 1987-2000. An occurrence of tri and tetraCNs in deep sediment layers corresponded to preindustrial synthesis and use of CNs seems to be connected to relatively greater water solubility and mobility in the pore water of those CN homologue groups. Based on CN congener pattern and results of multivariate analysis three main layers were separated in the sediment core. Starting from 1981 the emission sources related to combustion marker congeners become substantial contributors to flux of annually deposited CNs, while relative significance of the evaporative source marker congeners decreased after 1985. The annual flux of CNs into sediments of the Lake Kitaura was 0.073-0.31 pg/cm2 before 1926, increased to 5.5-14 pg/cm2 in 1963-1970 and next sharply increased to 50-107 pg/ cm2 in 1971-1985, and after that decreased to 17 pg/cm2 in 1997-2000.

Congener

Sediment core

10.1081/ese-120027727

Cite

Citations (37)

Development of Artificial Urine Certified Reference Material for Quantification of Neonicotinoid Insecticides

Journal of AOAC International (2020)

Takamitsu Otake Shoji F. Nakayama Tomohiko Isobe Nobuyasu Hanari

Abstract Background Neonicotinoid insecticides (neonicotinoids) are widely used, however, they can negatively affect human health. Thus, neonicotinoids and their metabolites in human urine are analyzed globally to assess exposure levels and health risks. To properly assess the exposure levels and health risks, accurate analytical results are a necessity. Objective This study aims to develop urine certified reference material (CRM), NMIJ CRM 7408-a, for the quantification of neonicotinoids. Method To develop NMIJ CRM 7408-a, commercially available artificial urine was used as the raw material to which the target neonicotinoids were added. Analyses of neonicotinoids in NMIJ CRM 7408-a were carried out by isotope dilution mass spectrometry (IDMS). Results Sample homogeneity was assessed, with the results showing that acetamiprid, clothianidin, thiacloprid, and thiamethoxam exhibited sufficiently homogeneous distributions in the material. The relative uncertainties due to inhomogeneity were 1.2–7.0%. The results obtained from long-term stability assessment indicated that the target neonicotinoids were stable. The relative uncertainties due to instability were 9.4–17.2% (for an expiry date of 21 months). The characterization for providing concentration values was carried out using one (clothianidin and thiacloprid) or two (acetamiprid and thiamethoxam) analytical methods. The certified values of the target neonicotinoids (acetamiprid, clothianidin, thiacloprid, and thiamethoxam) were 0.19–1.38 µg/kg. Conclusions This is the first frozen artificial urine CRM in which neonicotinoids were quantified by IDMS and will be useful for evaluating the accuracy of analysis and validation of analytical methods for the determination of neonicotinoids in urine. Highlights NMIJ CRM 7408-a, which has been certified for four neonicotinoids, was developed by NMIJ.

Clothianidin

Thiacloprid

Neonicotinoid

Acetamiprid

10.1093/jaoacint/qsaa061

Cite

Citations (0)

Development of plastic disks containing flame retardants for elucidating changes in their concentrations due to simulated weathering and the application of these disks to weathering tests

Environmental Monitoring and Assessment (2017)

Nobuyasu Hanari Takamitsu Otake Nobuyasu Itoh Ayaka Wada Masaki Ohata

10.1007/s10661-017-5808-7

Cite

Citations (5)