Phytoextraction of trace elements from an aged biosolid stockpile by willow (Salix) species after one year
Seven cultivars of willow (Salix) were planted in aged biosolids contaminated with multiple trace elements. Willow shoots (stems and leaves) were harvested in autumn to remove metal contaminants taken up by the plants. Cultivars of two willow species, S. reichardtii and S. matsudana, grown in biosolids produced up to 3 times more biomass than willows grown in soil. Cultivars with high tissue metal concentrations produced less biomass. Salix reichardtii and S. matsudana had some of the lowest tissues metal concentrations but extracted the most heavy metals by comparison to the other cultivars in a single season. Average heavy metal removals (g·ha <1>) by S. reichardtii in the first year were: Cd 84, Cr 20, Cu 51, Hg 3, Ni 272 and Zn 7726. Biomass production and heavy metal extraction are expected to increase in the second year.
biosolids heavy metals phytoextraction Salix
W. S. Laidlaw D. Gregory T. T. Huynh M. Godino A. J. M. Baker
Applied Ecology Research Group, School of Botany, The University of Melbourne, Parkville, Victoria 3 Research and Technology, Melbourne Water, 100 Wellington Parade, East Melbourne, Victoria 3002, Aust
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
190-191
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）