Nobuyoshi Yamashita

National Institute of Advanced Industrial Science and Technology

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Sachi Taniyasu

National Institute of Advanced Industrial Science and Technology

129

Paul K.S. Lam

City University of Hong Kong

Kurunthachalam Kannan

Wadsworth Center

Eriko Yamazaki

National Institute of Advanced Industrial Science and Technology

Yuichi Horii

Center for Environmental Science in Saitama

Jerzy Falandysz

Medical University of Lodz

Leo W.Y. Yeung

Örebro University

Nobuyasu Hanari

National Institute of Advanced Industrial Science and Technology

John P. Giesy

University of Saskatchewan

T. H. Prettyman

Planetary Science Institute

Cooperative Institutions

National Institute of Advanced Industrial Science and Technology

City University of Hong Kong

Sanyo-Onoda City University

The University of Tokyo

New York State Department of Health

Osaka University

Wadsworth Center

Planetary Science Institute

University at Albany, State University of New York

Kyoto University

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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)

Composition of PCB Isomers and Congeners in Technical Chlorofen Formulation Produced in Poland

International Journal of Environmental & Analytical Chemistry (1992)

Jerzy Falandysz Nobuyoshi Yamashita Shinsuke Tanabe Ryo Tatsukawa

Abstract The composition of Chlorofen, a technical formulation of polychlorinated biphenyls (PCBs) produced in Poland, has been investigated using GC-ECD and GC-MS techniques. Chlorofen was a highly chlorinated mixture (63.6% Cl), mainly composed of PCB members with 5 to 9 chlorine atoms which comprised 99.55% of total PCBs. The average number of Cl per molecule in Chlorofen was 7.3, and the average molecular weight was 405.4. It was found that Chlorofen contained at least 59 PCB congeners with the major components such as IUPAC No. 153 of hexa-, 176, 180, 187 of hepta-, 194, 195, 198, 201/196 of octa- and 206 of nonachlorobiphenyls. Additionally, three components of highly toxic non-ortho chlorine substituted coplanar PCBs (IUPAC Nos 77, 126 and 169) were also quantified at a concentration of 0.52, 0.25 and 0.43 μg g−1, respectively, the latter (169), showing a greater content than in Aroclor and Kanechlor formulations.

10.1080/03067319208027023

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Citations (36)

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)

Depuration kinetics and tissue disposition of PFOA and PFOS in white leghorn chickens (Gallus gallus) administered by subcutaneous implantation

Ecotoxicology and Environmental Safety (2007)

Hoon Yoo Keerthi S. Guruge Noriko Yamanaka Chihiro Sato Osamu Mikami

Perfluorooctanoic acid

Perfluorooctane

Gallus gallus domesticus

10.1016/j.ecoenv.2007.09.007

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