—Heavy metal contamination of soil may pose risks to human health and ecosystem environment. Phytoremediation
is a low-cost and ecologically sustainable way to remediate
heavy metal contaminated soils. As most of the heavy metal accumulator plants are low biomass producers, we selected maize as our experimental phytoremediation plant, which can both produce large useful biomass and remediate heavy metal
contaminated soils. The effect of humic acid and bacterial manure on heavy metal accumulation in different organs of
maize was studied in this paper, in order to investigate whether
the fertilizer application has an effect on phytoremediation
efficiency. The results showed that Cu, Pb and Zn contents in the organs of maize generally followed the order root>stem≈leaf>grain. Application of humic acid and bacterial manure improved the contents of Cu, Zn and Pb in different organs compared with those without fertilizer application.
Maize with humic acid application generally had higher contents of Cu, Zn and Pb in the organs than that with bacterial
manure application. This study indicated that fertilizer
application was possibly one of the efficient ways to enhance the
efficiency of soil phytoremediation.
—Soil contamination, heavy metal,
phytoremediation, humic acid, bacterial manure, maize.
Tao Li and Hongyan Cheng are with the College of Resources and Environment, Shanxi Agricultural University, Shanxi, China (e-mail:
Kokyo Oh and Shigeo Hosono are with Center for Environmental Science in Saitama, 914 Kamitanadare, kazo, Saitama 347-0115, Japan (e-mail: o.kokyo@ pref.saitama.lg.jp; hosono.shigeo@ pref.saitama.lg.jp).
Cite:Tao Li, Hongyan Cheng, Kokyo Oh, and Shigeo Hosono, "Effect of Humic Acid and Bacterial Manure on Distribution of Heavy Metals in Different Organs of Maize," International Journal of Environmental Science and Development vol. 5, no. 4, pp. 393-397, 2014.