Stability of Lead Immobilized by Apatite in Lead-Containing Rhizosphere Soil of Buckwheat (Fagopyrum esculentum) and Hairy Vetch (Vicia villosa)

International Journal of Phytoremediation
Masahiko KatohT Sato

Abstract

This study conducted plant growth experiments using a rhizobox system to understand the growth of buckwheat and hairy vetch as well as the stability of lead immobilized by hydroxyapatite (HAP) in the lead-containing rhizosphere soil. The shoot dry weight of buckwheat did not significantly differ between the lead-containing rhizosphere soil with and without HAP, whereas that of hairy vetch with rhizosphere soil without HAP was reduced. Lead was not accumulated from the rhizosphere soil to the shoots of either plant when HAP was added. The percentage of each lead fraction in sequential extraction was approximately the same through the 3 mm of rhizosphere soils from the root surface and non-planted soil, with and without the addition of HAP. For hairy vetch, the amount of water-soluble lead in the HAP-added rhizosphere soil within 3 mm thickness from the root surface did not increase. However, for buckwheat, the amount of water-soluble lead in the HAP-added rhizosphere soil 1 mm from the root surface increased to the same level as that in the non-planted soil without HAP. Our results suggest that when applying phytostabilization combined with apatite to lead-contaminated soil, the plant that cannot re-mobilize lead should be selec...Continue Reading

References

Jan 11, 2002·Environmental Science & Technology·J A RyanD E Sayers
May 10, 2002·Environmental Science & Technology·Elena MavropoulosMarcelo Saldanha
Sep 24, 2005·Journal of Plant Research·Hideo TamuraHiroyuki Kamachi
Oct 18, 2005·The Science of the Total Environment·Kirk G ScheckelNinnia V Lescano
Nov 16, 2006·Planta·Huanhua WangMartinus Th van Genuchten
May 31, 2007·Environmental Science & Technology·Lu Y L ZhaoBernd Nowack

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Citations

May 5, 2016·Environmental Technology·Masahiko KatohTakeshi Sato
Oct 27, 2017·International Journal of Environmental Research and Public Health·Masahiko KatohTakeshi Sato
Oct 21, 2017·International Journal of Phytoremediation·Jürgen FranzaringPhilipp Büttner
Jul 15, 2020·Environmental Geochemistry and Health·Sayuko HadaMasahiko Katoh
Jul 17, 2021·Chemosphere·Helen C S AmorimMaurício P F Fontes

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Methods Mentioned

BETA
X-ray

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