Sachi Taniyasu

National Institute of Advanced Industrial Science and Technology

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Nobuyoshi Yamashita

National Institute of Advanced Industrial Science and Technology

129

Paul K.S. Lam

City University of Hong Kong

Eriko Yamazaki

National Institute of Advanced Industrial Science and Technology

Leo W.Y. Yeung

Örebro University

Kurunthachalam Kannan

Wadsworth Center

Jerzy Falandysz

Medical University of Lodz

Yuichi Horii

Center for Environmental Science in Saitama

Nobuyasu Hanari

National Institute of Advanced Industrial Science and Technology

Paweł Rostkowski

Kjeller Innovasjon (Norway)

Man Ka So

City University of Hong Kong

Cooperative Institutions

National Institute of Advanced Industrial Science and Technology

City University of Hong Kong

Chinese Academy of Sciences

Wadsworth Center

New York State Department of Health

Osaka University

University at Albany, State University of New York

Sanyo-Onoda City University

The University of Tokyo

American Chemical Society

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Partitioning of perfluorooctanoate (PFOA), perfluorooctane sulfonate (PFOS) and perfluorooctane sulfonamide (PFOSA) between water and sediment

Chemosphere (2011)

Lutz Ahrens Leo W.Y. Yeung Sachi Taniyasu Paul K.S. Lam Nobuyoshi Yamashita

Perfluorooctane

Perfluorooctanoic acid

Sulfonamide

10.1016/j.chemosphere.2011.06.046

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Citations (202)

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

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Citations (2)

Perfluorooctane sulfonate (PFOS) and related fluorochemicals in chicken egg in China

Chinese Science Bulletin (2008)

Yuan Wang Leo W.Y. Yeung Nobuyoshi Yamashita Sachi Taniyasu Man Ka So

Perfluorooctane

Yolk

10.1007/s11434-008-0128-5

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Citations (46)

Alkaline Digestion and Solid Phase Extraction Method for Perfluorinated Compounds in Mussels and Oysters from South China and Japan

Archives of Environmental Contamination and Toxicology (2005)

Man Ka So Sachi Taniyasu Paul K.S. Lam G.J. Zheng John P. Giesy

Perfluorooctane

Solid phase extraction

10.1007/s00244-005-7058-x

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Citations (127)

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

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Citations (0)

Interlaboratory Trial on the Analysis of Individual Isomers of Nonylphenol in Water Samples According to ISO 24293 : 2009

BUNSEKI KAGAKU (2010)

Yuichi Horii Sachi Taniyasu Yoshiteru Tsuchiya Jyunichi Nakagawa Takumi Takasuga

ISO 24293 : 2009は,固相抽出とガスクロマトグラフィー/質量分析(GC/MS)を用いて水試料中ノニルフェノール異性体を個別に測定する新規制定の国際標準分析法である.本報ではISO 24293 : 2009の妥当性評価のために行われた試験所間試験の結果を報告する.当試験には国内外17機関が参加し,ノニルフェノール低濃度添加河川水(RW1),高濃度添加河川水(RW2),低濃度添加排水(WW3)及び高濃度添加排水(WW4)の4試料について測定した.各機関におけるノニルフェノール異性体13物質の室内変動係数は4.4%~21.6% の範囲であった.試料ごとの室間変動係数はRW1 : 24.9 ± 6.4%,RW2 : 30.6 ± 10.7%,WW3 : 63.3 ± 34.6%,WW4 : 36.6 ± 13.5% であった.ロバスト法zスコアにより試験機関を評価したところ,各試料における機関数の割合は,satisfactoryが71~92%,questionableが0~10%,unsatisfactoryが7.7~23% の範囲であった.

Nonylphenol

10.2116/bunsekikagaku.59.319

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Citations (5)

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

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Citations (18)

Perfluoroalkyl Acids in the Atlantic and Canadian Arctic Oceans

Environmental Science & Technology (2012)

Jonathan P. Benskin Derek C. G. Muir Brian F. Scott Christine Spencer Amila O. De Silva

We report here on the spatial distribution of C(4), C(6), and C(8) perfluoroalkyl sulfonates, C(6)-C(14) perfluoroalkyl carboxylates, and perfluorooctanesulfonamide in the Atlantic and Arctic Oceans, including previously unstudied coastal waters of North and South America, and the Canadian Arctic Archipelago. Perfluorooctanoate (PFOA) and perfluorooctanesulfonate (PFOS) were typically the dominant perfluoroalkyl acids (PFAAs) in Atlantic water. In the midnorthwest Atlantic/Gulf Stream, sum PFAA concentrations (∑PFAAs) were low (77-190 pg/L) but increased rapidly upon crossing into U.S. coastal water (up to 5800 pg/L near Rhode Island). ∑PFAAs in the northeast Atlantic were highest north of the Canary Islands (280-980 pg/L) and decreased with latitude. In the South Atlantic, concentrations increased near Rio de la Plata (Argentina/Uruguay; 350-540 pg/L ∑PFAAs), possibly attributable to insecticides containing N-ethyl perfluorooctanesulfonamide, or proximity to Montevideo and Buenos Aires. In all other southern hemisphere locations, ∑PFAAs were <210 pg/L. PFOA/PFOS ratios were typically ≥1 in the northern hemisphere, ∼1 near the equator, and ≤1 in the southern hemisphere. In the Canadian Arctic, ∑PFAAs ranged from 40 to 250 pg/L, with perfluoroheptanoate, PFOA, and PFOS among the PFAAs detected at the highest concentrations. PFOA/PFOS ratios (typically ≫1) decreased from Baffin Bay to the Amundsen Gulf, possibly attributable to increased atmospheric inputs. These data help validate global emissions models and contribute to understanding of long-range transport pathways and sources of PFAAs to remote regions.

Archipelago

10.1021/es300578x

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Citations (156)

Perfluoroalkyl substances and extractable organic fluorine in surface sediments and cores from Lake Ontario

Environment International (2013)

Leo W.Y. Yeung Amila O. De Silva Eva I. H. Loi Chris H. Märvin Sachi Taniyasu

Fourteen perfluoroalkyl substances (PFASs) including short-chain perfluorocarboxylates (PFCAs, C4-C6) and perfluoroalkane sulfonates (PFSAs, C4 and C6) were measured in surface sediment samples from 26 stations collected in 2008 and sediment core samples from three stations (Niagara, Mississauga, and Rochester basins) collected in 2006 in Lake Ontario. Perfluorooctanesulfonate (PFOS), perfluorooctanoate (PFOA), perfluorononanoate (PFNA), perfluorodecanoate (PFDA), and perfluoroundecanoate (PFUnDA) were detected in all 26 surface sediment samples, whereas perfluorohexane sulfonate (PFHxS), perfluorooctane sulfonamide (FOSA), perfluorododecanoate (PFDoDA) and perfluorobutanoate (PFBA) were detected in over 70% of the surface sediment samples. PFOS was detected in all of the sediment core samples (range: 0.492-30.1ngg(-1) d.w.) over the period 1952-2005. The C8 to C11 PFCAs, FOSA, and PFBA increased in early 1970s. An overall increasing trend in sediment PFAS concentrations/fluxes from older to more recently deposited sediments was evident in the three sediment cores. The known PFCAs and PFSAs accounted for 2-44% of the anionic fraction of the extractable organic fluorine in surface sediment, suggesting that a large proportion of fluorine in this fraction remained unknown. Sediment core samples collected from Niagara basin showed an increase in unidentified organic fluorine in recent years (1995-2006). These results suggest that the use and manufacture of fluorinated organic compounds other than known PFCAs and PFSAs has diversified and increased.

Perfluorooctane

Sediment core

Fraction (chemistry)

10.1016/j.envint.2013.06.026

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Citations (130)

Distribution of polyfluoroalkyl compounds in water, suspended particulate matter and sediment from Tokyo Bay, Japan

Chemosphere (2010)

Lutz Ahrens Sachi Taniyasu Leo W.Y. Yeung Nobuyoshi Yamashita Paul K.S. Lam

Perfluorooctane

10.1016/j.chemosphere.2010.01.045

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Citations (365)