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

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1631-1638
Number of pages8
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume49
Issue number14
DOIs
Publication statusPublished - 2014 Dec 20
Externally publishedYes

Keywords

  • Arsenic
  • Pteris vittata
  • phytoremediation
  • salt stress
  • tsunami sediments

ASJC Scopus subject areas

  • Environmental Engineering

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