Phytoremediation of perchlorate by free floating macrophytes

J Hazard Mater. 2013 Sep 15;260:901-6. doi: 10.1016/j.jhazmat.2013.06.008. Epub 2013 Jun 19.


Phytoremediation of perchlorate by free floating macrophytes (Eichornia, Pistia, Salvinia and Lemna) was evaluated in this study. Among the plants tested, Pistia showed 63.8 ± 4% (w/v) removal of 5 mg/L level perchlorate in 7 days, whereas the removal was absent in other plants. Phyto-accumulation (18.2%) and rhizo-degradation (45.68%) were identified as the mechanisms involved in perchlorate removal in Pistia. Whole plant extraction yielded 45.4 μg perchlorate/g dry weight biomass in 7 days period. High intensity of light and presence of nitrate negatively affected perchlorate removal by Pistia. An enrichment of Pistia root homogenate exhibited faster reduction of perchlorate where 100mg/L of the compound was reduced completely in 48 h under anoxic condition. A novel perchlorate reducing bacterium, isolated from Pistia root homogenate enrichment was identified as Acinetobacter sp. NIIST (Genbank JX467695).

Keywords: Perchlorate; Phytoaccumulation; Phytoremediation; Rhizodegradation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acinetobacter / metabolism*
  • Araceae / metabolism*
  • Biodegradation, Environmental*
  • Biomass
  • Eichhornia / metabolism
  • Magnoliopsida / metabolism
  • Molecular Sequence Data
  • Nitrates / chemistry
  • Perchlorates / chemistry*
  • Plant Roots / microbiology
  • Sunlight
  • Time Factors
  • Tracheophyta / metabolism
  • Water Pollutants, Chemical / analysis*
  • Water Pollutants, Chemical / chemistry
  • Water Purification / methods


  • Nitrates
  • Perchlorates
  • Water Pollutants, Chemical
  • perchlorate

Associated data

  • GENBANK/JX467695