Effect of available nitrogen on phytoavailability and bioaccumulation of hexavalent and trivalent chromium in hankow willows (Salix matsudana Koidz)

Ecotoxicology and Environmental Safety
Xiao-Zhang Yu, Ji-Dong Gu

Abstract

The effect of available nitrogen in nutrient solution on removal of two chemical forms of chromium (Cr) by plants was investigated. Pre-rooted hankow willows (Salix matsudana Koidz) were grown in a hydroponic solution system with or without nitrogen, and amended with hexavalent chromium [Cr (VI)] or trivalent chromium [Cr (III)] at 25.0+/-0.5 degrees C for 192 h. The results revealed that higher removal of Cr by plants was achieved from the hydroponic solutions without any nitrogen than those containing nitrogen. Although faster removal of Cr (VI) than Cr (III) was observed, translocation of Cr (III) within plant materials was more efficient than Cr (VI). Substantial difference existed in the distribution of Cr in different parts of plant tissues due to the nitrogen in nutrient solutions (p<0.05): lower stems were the major sink for both Cr species in willows grown in the N-free nutrient solutions and more Cr was accumulated in the roots of plants in N-containing ones. No significant difference was found in the removal rate of Cr (VI) between willows grown in the N-free and N-containing solutions (p>0.05). Removal rates of Cr (III) decreased linearly with the strength of nutrient solutions with or without N addition (p<0.01). T...Continue Reading

References

Jun 28, 2000·Archives of Environmental Contamination and Toxicology·S TrappU Karlson
Aug 27, 2004·International Journal of Phytoremediation·E MeersM G Verloo
May 10, 2005·Environment International·Arun K ShankerS Avudainayagam
Aug 25, 2005·Environmental Toxicology and Chemistry·Xiang-Rong XuXiao-Yan Li
Jan 27, 2007·Ecotoxicology·Xiao-Zhang YuShen-Zhuo Huang
Mar 24, 2007·Archives of Environmental Contamination and Toxicology·X-Z Yu, J-D Gu
Jan 1, 1976·Planta·R A SkeffingtonP J Peterson

❮ Previous
Next ❯

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.