Chemical speciation and bioavailability concentration of arsenic and heavy metals in sediment and soil cores in estuarine ecosystem, Vietnam

Nguyen Van Thinh, Yasuhito Osanai, Tatsuro Adachi, Phong K. Thai, Nobuhiko Nakano, Akinori Ozaki, Yoshihiro Kuwahara, Ryosuke Kato, Masato Makio, Kiyoshi Kurosawa

研究成果: ジャーナルへの寄稿記事

9 引用 (Scopus)

抄録

The first investigation of arsenic (As) contamination in soil cores in the biggest estuarine ecosystem in northern Vietnam was conducted using FE-EPMA, ICP-MS and XRD techniques. Concentrations of arsenic and five heavy metals were measured and mineralogical characteristic of soils and sediments in different land uses were analyzed. Most of the soils contained high proportions of As and heavy metals in the potential mobility fractions and silicate minerals. High concentrations of As and heavy metals were observed in river sediments and top-layers of mangrove forest soil cores. Qualitative analyses using WDS technique on FE-EPMA found As on the iron (hydro)oxides and framboidal pyrite surfaces in the samples. The principal component analysis indicated the enrichment of As and heavy metals in the upper soil layers, suggesting that intensive human activities in upstream of the Red river in recent decades could be the cause of elevated levels of these toxic elements in the estuarine ecosystem.

元の言語英語
ページ(範囲)268-277
ページ数10
ジャーナルMicrochemical Journal
139
DOI
出版物ステータス出版済み - 6 1 2018

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Chemical speciation
Aquatic ecosystems
Arsenic
Heavy Metals
Sediments
Soils
Electron probe microanalysis
Rivers
Wavelength dispersive spectroscopy
Silicate minerals
Poisons
Land use
Principal component analysis
Oxides
Biological Availability
Contamination
Iron

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Spectroscopy

これを引用

Chemical speciation and bioavailability concentration of arsenic and heavy metals in sediment and soil cores in estuarine ecosystem, Vietnam. / Thinh, Nguyen Van; Osanai, Yasuhito; Adachi, Tatsuro; Thai, Phong K.; Nakano, Nobuhiko; Ozaki, Akinori; Kuwahara, Yoshihiro; Kato, Ryosuke; Makio, Masato; Kurosawa, Kiyoshi.

:: Microchemical Journal, 巻 139, 01.06.2018, p. 268-277.

研究成果: ジャーナルへの寄稿記事

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abstract = "The first investigation of arsenic (As) contamination in soil cores in the biggest estuarine ecosystem in northern Vietnam was conducted using FE-EPMA, ICP-MS and XRD techniques. Concentrations of arsenic and five heavy metals were measured and mineralogical characteristic of soils and sediments in different land uses were analyzed. Most of the soils contained high proportions of As and heavy metals in the potential mobility fractions and silicate minerals. High concentrations of As and heavy metals were observed in river sediments and top-layers of mangrove forest soil cores. Qualitative analyses using WDS technique on FE-EPMA found As on the iron (hydro)oxides and framboidal pyrite surfaces in the samples. The principal component analysis indicated the enrichment of As and heavy metals in the upper soil layers, suggesting that intensive human activities in upstream of the Red river in recent decades could be the cause of elevated levels of these toxic elements in the estuarine ecosystem.",
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AU - Thinh, Nguyen Van

AU - Osanai, Yasuhito

AU - Adachi, Tatsuro

AU - Thai, Phong K.

AU - Nakano, Nobuhiko

AU - Ozaki, Akinori

AU - Kuwahara, Yoshihiro

AU - Kato, Ryosuke

AU - Makio, Masato

AU - Kurosawa, Kiyoshi

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N2 - The first investigation of arsenic (As) contamination in soil cores in the biggest estuarine ecosystem in northern Vietnam was conducted using FE-EPMA, ICP-MS and XRD techniques. Concentrations of arsenic and five heavy metals were measured and mineralogical characteristic of soils and sediments in different land uses were analyzed. Most of the soils contained high proportions of As and heavy metals in the potential mobility fractions and silicate minerals. High concentrations of As and heavy metals were observed in river sediments and top-layers of mangrove forest soil cores. Qualitative analyses using WDS technique on FE-EPMA found As on the iron (hydro)oxides and framboidal pyrite surfaces in the samples. The principal component analysis indicated the enrichment of As and heavy metals in the upper soil layers, suggesting that intensive human activities in upstream of the Red river in recent decades could be the cause of elevated levels of these toxic elements in the estuarine ecosystem.

AB - The first investigation of arsenic (As) contamination in soil cores in the biggest estuarine ecosystem in northern Vietnam was conducted using FE-EPMA, ICP-MS and XRD techniques. Concentrations of arsenic and five heavy metals were measured and mineralogical characteristic of soils and sediments in different land uses were analyzed. Most of the soils contained high proportions of As and heavy metals in the potential mobility fractions and silicate minerals. High concentrations of As and heavy metals were observed in river sediments and top-layers of mangrove forest soil cores. Qualitative analyses using WDS technique on FE-EPMA found As on the iron (hydro)oxides and framboidal pyrite surfaces in the samples. The principal component analysis indicated the enrichment of As and heavy metals in the upper soil layers, suggesting that intensive human activities in upstream of the Red river in recent decades could be the cause of elevated levels of these toxic elements in the estuarine ecosystem.

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