Uptake and exudation behavior of perchlorate in smartweed

International Journal of Phytoremediation
Kui TanW Andrew Jackson

Abstract

Perchlorate uptake has been reported in a variety of vascular plants, but the mechanisms affecting the uptake, translocation, and exudation of ClO4(-) in plants are not well known. The uptake and transport behavior of ClO4(-) was studied in smartweed (Polygonum spp.) grown in aerated hydroponic ClO4(-) solutions with or without other common anions. Uptake followed first-order kinetics (0.017 +/- 0.003 day(-1)) and there was no apparent competitive effect on ClO4(-) uptake for up to 500 mg L(-1) of NO3(-) -N, SO4(2-), PO4(3-), or Cl(-). The net ClO4(-) mass uptake was proportional to transpiration but with some exclusion of ClO4(-) from the transpiration stream. Up to 4% of the ClO4(-) in plants after a 30-d exposure to a 10-mg/L solution of ClO4(-) was exuded from the roots within 15 d after the exposure was ended. Perchlorate exudation followed first-order kinetics with a rate coefficient of 0.0018 +/- 0.0006 (day(-1) Results obtained in this study indicate that evapotranspiration may be the critical variable to predict accumulation potential in plants and that phytoremediation strategies should take into account the re-release potential of ClO4(-) via exudation.

References

Aug 24, 1999·Journal of Chromatography. a·P E JacksonJ S Rohrer
Jul 21, 2000·The Science of the Total Environment·E T UrbanskyS K Brown
Jan 11, 2000·Journal of Chromatography. a·J J Ellington, J J Evans
Aug 17, 2001·Environmental Science & Technology·J J EllingtonQ Teng
Jul 9, 2002·Environmental Science & Technology·Benoit van Aken, Jerald L Schnoor
Apr 17, 2004·Ecotoxicology and Environmental Safety·Lu YuTodd A Anderson
Jul 1, 2004·International Journal of Phytoremediation·Valentine A NzengungWalter O'Niell
Sep 10, 2004·Journal of Environmental Quality·Kui TanW Andrew Jackson
Oct 20, 2004·Water Research·Kui TanJohn H Pardue
Jan 20, 2005·Journal of Agricultural and Food Chemistry·W Andrew JacksonTodd A Anderson
Apr 12, 2005·Environmental Science & Technology·Purnendu K DasguptaSrinath Rajagopalan

❮ Previous
Next ❯

Citations

Jul 23, 2013·Journal of Hazardous Materials·Krishnakumar BhaskaranPrajeesh Gangadharan Puthiya Veetil
Jan 29, 2017·Environmental Monitoring and Assessment·R CalderónP Palma
Jan 21, 2015·Journal of Environmental Quality·D A GrantzG Harvey
Apr 17, 2021·Journal of Agricultural and Food Chemistry·Yabo LiangZongmao Chen

❮ Previous
Next ❯

Software Mentioned

SigmaPlot
SPSS

Related Concepts

Related Feeds

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.