Evaluation of the effectiveness and salt stress of Pteris vittata in the remediation of arsenic contamination caused by tsunami sediments

Kazuki Sugawara, Akihiro Kobayashi, Ginro Endo, Masayoshi Hatayama, Chihiro Inoue

研究成果: Article査読

3 被引用数 (Scopus)

抄録

On March 11, 2011, one of the negative effects of the tsunami phenomenon that devastated the Pacific coast of the Tohoku district in Japan was the deposition of a wide range of arsenic (As) contamination to the soil. To remediate such a huge area of contamination, phytoremediation by Pteris vittata, an As-hyperaccumulator, was considered. To evaluate the efficacy of applying P. vittata to the area, the salt tolerance of P. vittata and the phytoextraction of As from soil samples were investigated. For the salt tolerance test, spore germination was considerably decreased at an NaCl level of more than 100 mM. At 200 mM, the gametophytes exhibited a morphological defect. Furthermore, the growth inhibition of P. vittata was observed with a salinity that corresponded to 66.2 mS/m of electric conductivity (EC) in the soil. A laboratory phytoremediation experiment was conducted using As-contaminated soils for 166 days. P. vittata grew and accumulated As at 264 mg/kg-DW into the shoots. Consequently, the soluble As in the soil was evidently decreased. These results showed that P. vittata was applicable to the phytoremediation of As-contaminated soil with low salinity as with the contamination caused by the 2011 tsunami.

本文言語English
ページ(範囲)1631-1638
ページ数8
ジャーナルJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
49
14
DOI
出版ステータスPublished - 2014 12 20

ASJC Scopus subject areas

  • 環境工学

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