Yukie Mato’s research while affiliated with Tokyo University of Agriculture and Technology and other places

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Publications (6)


International Pellet Watch: Global monitoring of persistent organic pollutants (POPs) in coastal Waters. 1. Initial phase data on PCBs, DDTs, and HCHs
  • Article

August 2009

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1,060 Reads

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730 Citations

Marine Pollution Bulletin

Yuko Ogata

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Richard C Thompson

Samples of polyethylene pellets were collected at 30 beaches from 17 countries and analyzed for organochlorine compounds. PCB concentrations in the pellets were highest on US coasts, followed by western Europe and Japan, and were lower in tropical Asia, southern Africa and Australia. This spatial pattern reflected regional differences in the usage of PCBs and was positively correlated with data from Mussel Watch, another monitoring approach. DDTs showed high concentrations on the US west coast and in Vietnam. In Vietnam, DDT was predominant over its metabolites (DDE and DDD), suggesting the principal source may be current usage of the pesticide for malaria control. High concentrations of pesticide HCHs were detected in the pellets from southern Africa, suggesting current usage of the pesticides in southern Africa. This study demonstrates the utility and feasibility of the International Pellet Watch approach to monitor POPs at a global scale.




Plastic pellets in the marine environment of Tokyo Bay and Sagami Bay

March 2002

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261 Reads

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24 Citations

Nihon-suisan-gakkai-shi

Resin pellets as a raw material of industrial plastic products are widespread in the coastal waters and beaches of the world. In this study, the distribution and abundance of the pellets were investigated on the coastal area (30 beaches) of Tokyo Bay and Sagami Bay. In most stations surveyed, the pellets were found (93% of total stations) and were particularly abundant at Kugenuma Beach, Nojima Seaside Park, Jonanjima Seaside Park and Kasai Seaside Park. The Highest density of the pellets on a beach exceeded 1,000/m2. From near infra-red spectrometry analyses, the pellets on most beaches were found to be comprised mostly of polyethylene (60%) and polypropylene (35%) which are very common constituents of plastic productions in Japan. Effluent from plastics manufacturers was suggested to be the major source of the pellets in the coastal areas of Tokyo Bay and Sagami Bay.



Plastic Resin Pellets as a Transport Medium for Toxic Chemicals in the Marine Environment

February 2001

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1,620 Reads

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1,919 Citations

Environmental Science and Technology

Plastic resin pellets (small granules 0.1-0.5 centimeters in diameter) are widely distributed in the ocean all over the world. They are an industrial raw material for the plastic industry and are unintentionally released to the environment both during manufacturing and transport. They are sometimes ingested by seabirds and other marine organisms, and their adverse effects on organisms are a concern. In the present study, PCBs, DDE, and nonylphenols (NP) were detected in polypropylene (PP) resin pellets collected from four Japanese coasts. Concentrations of PCBs (4-117 ng/g), DDE (0.16-3.1 ng/g), and NP (0.13-16 microg/g) varied among the sampling sites. These concentrations were comparable to those for suspended particles and bottom sediments collected from the same area as the pellets. Field adsorption experiments using PP virgin pellets demonstrated significant and steady increase in PCBs and DDE concentrations throughout the six-day experiment, indicating that the source of PCBs and DDE is ambient seawater and that adsorption to pellet surfaces is the mechanism of enrichment. The major source of NP in the marine PP resin pellets was thought to be plastic additives and/or their degradation products. Comparison of PCBs and DDE concentrations in mari

Citations (6)


... Health impacts of stranded material could derive also from the chemicals acquired from seawater and then transferred to the sand (i.e., polycyclic aromatic hydrocarbons). Information on chemicals accumulation in stranded material is widely underexplored and limited to plastic resin pellets (small 10 -50 mm granules; Takada et al. 2012). Moreover, the studies on human health risk from exposure to chemical-contaminated sand are limited to beaches impacted by oil spills (Black et al. 2016;Altomare et al., 2021), therefore after the occurrence of extreme contamination events. ...

Reference:

Original Articles Beach pollution from marine litter: Analysis with the DPSIR framework (driver, pressure, state, impact, response) in Tuscany, Italy
Pellet Watch: global monitoring of persistent organic pollutants (POPs) using beached plastic resin pellets
  • Citing Article
  • January 2005

... For example, in an in situ adsorption experiment, PE was found to have a higher affinity for PCBs than PP. 130 All MPs identied in the present study, with the exception of one polyamide/nylon piece, were less dense than sea water and were able to oat on the water surface and transported over long distances. Thus, they can be exposed to POPs from other areas before they reach the studied beaches and therefore they can reect the pollution along the entire transport path. ...

Toxic chemicals contained in plastic resin pellets in the marine environment-spatial difference in pollutant concentrations and the effects of resin type
  • Citing Article
  • January 2002

... These pellets are transported to factories where they are heated, melted, pressed, and molded into the final product, such as packaging, toys, and automobile parts. During transportation and handling, a portion of the pellets are spilled to the environments and eventually washed into streams and rivers and then the ocean (Kuriyama et al., 2002). In addition, plastic resin pellets are spilled from containers onboard at the harbors accidentally and / or storm events (Saliba et al., 2022;James et al., 2023). ...

Plastic pellets in the marine environment of Tokyo Bay and Sagami Bay
  • Citing Article
  • March 2002

Nihon-suisan-gakkai-shi

... Also APEOs are used for emulsion polymerization in plastic production (Talmage, 1994). Detection of nonylphenols in plastic products has been reported (Isobe et al., 2002;Loyo-Rosales et al., 2004). These additive-derived NP are a source of NP detected in oceanic plastic fragments. ...

Determination of Nonylphenol migrated from Food-contact Plastics.
  • Citing Article
  • September 2002

Journal of Environmental Chemistry

... Due to the hydrophobic nature of plastics, hydrophobic contaminants in seawater are adsorbed and become concentrated in plastic pellets (Mato et al., 2001;Rochman et al., 2013). Various persistent organic contaminants, including PCBs, organochlorine pesticides, PBDEs, PAHs, coprostanol, and triclosan, have been measured in resin pellets to understand the pollution status of coastal waters (Ogata et al., 2009;Karapanagioti et al., 2011;Mizukawa et al., 2013;Hosoda et al., 2014;Yeo et al., 2015;Le et al., 2016;Taniguchi et al., 2016;Yeo et al., 2017;Yamashita et al., 2019;Pozo et al., 2020;Alidoust et al., 2021;Ohgaki et al., 2021;Alidoust et al., 2024). For this type of monitoring, polyethylene (PE) has been utilized because of its higher affinity to hydrophobic compounds (Endo et al., 2005;Karapanagioti and Klontza, 2008). ...

International Pellet Watch: Global monitoring of persistent organic pollutants (POPs) in coastal Waters. 1. Initial phase data on PCBs, DDTs, and HCHs
  • Citing Article
  • August 2009

Marine Pollution Bulletin

... In addition to polymers, plastic contains many other dangerous chemical substances (fillers, plasticizers, flame retardants, dyes, stabilizers, biocides, etc.) as well as unintentionally added substances (metabolites, impurities, contaminants, etc.) [37]. In aquatic environments, the long permanence of MPs involves the modification of their chemical fingerprint; on the one hand they release their chemical constituents, but above all they associate with environmental chemical substances such as organic compounds and metals, and also act as vectors of microorganisms [38][39][40][41][42]. All small pieces of plastic marine debris can act as microbe aggregating devices forming a biofilm called plastisphere, which provides habitats for a wide range of rafting organisms and microbial communities. ...

Plastic Resin Pellets as a Transport Medium for Toxic Chemicals in the Marine Environment
  • Citing Article
  • February 2001

Environmental Science and Technology