Abstract
Heavy metal stored in the sediment of shaollow lake will be released into water bodies when sediment resuspension occurs, causing secondary pollution. This study was conducted to probe the distribution and transportation of Zn, Cu, Cr, Pb among overlying water, pore water, SS and vegetation in 30d using three annular flumes. Iris pseudacorus L was planted in two flumes at the wind speed of 8.7m/s,6.5m/s respectively. Another flume was designed as a control at the wind of 8.7m/s under the condition of no plants. The results reavaled Iris pseudacorus L had strong enrichment on heavy metals. Total heavy metal (Zn、Cu、Cr、Pb) concentrations in sediment slightly decreased. The diffusion of metals in pore water showed greatly downward and the concentration in SS decreased with fluctuation with the increasing contents of dissolved metals in overlying water. Correspondingly, plants also appeared a gradual upward trend. The results of the study may work as a foundation for the phytoremediation of heavy metal pollution in shallow lake.
Publisher
Trans Tech Publications, Ltd.
Reference12 articles.
1. Zhang M, Cui L, Sheng L, et al. Ecological Engineering. 35(4): 563-569(2009).
2. Huang J, Ge X, Wang D. Journal of Environmental Sciences. 24(12): 2051-2059（2012）.
3. Mahmood T, Islam KR, Muhammad S. Toxic effects of heavy metals on early growth and tolerance of cereal crops. Pak J Bot. 39(2): 451–462(2007).
4. Soltan ME, Rashed MN. Adv Environ Res. 7: 321–334(2003).
5. Gupta D, Huang H, Yang X,. Hazard Mater. 177(1–3): 437–444, (2010).