Transport and assimilation of ferricyanide by three willow species

Fu Zhong Zhang, Xiao Zhang Yu*, Ji Dong Gu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Uptake, bioaccumulation, and assimilation of ferricyanide by three different species of willows was investigated. Intact prerooted weeping willows (Salix babylonica L.), Hankow willows (Salix matsudana Koidz), and hybrid willows (S. matsudana Koidz × alba L.) were grown hydroponically and treated with ferricyanide at 25.0 ± 0.5 C for 144 h. Willows without leaves were also investigated as a treatment to quantify effect of transpiration on transport and assimilation of ferricyanide. Dissociation of ferricyanide to free cyanide in solution in absence of light was negligible. Phytotransport of ferricyanide was apparent. The phytoremoval rate of ferricyanide obtained varied with willow species (p < 0.05). Remarkable decreases in the removal rate were detected with the trees without leaves compared with the intact trees (p < 0.01). Due to small amounts of the applied ferricyanide recovered in plant materials, ferricyanide removed from the hydroponic solution was largely assimilated by plants. Transpiration stream concentration factor (TSCF) was also estimated using the content of iron (Fe). These information suggests that phytodegradation is a major process involved in botanical assimilation of ferricyanide through an undefined degradation pathway.

Original languageEnglish
Article number1522
JournalWater, Air, and Soil Pollution
Volume224
Issue number4
DOIs
StatePublished - 2013
Externally publishedYes

Keywords

  • Assimilation
  • Cyanide
  • Ferricyanide
  • Iron
  • Uptake
  • Willow

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