Spatial distribution and speciation of heavy metals in soakaway sediment

Publisher:
IWA
Publication Type:
Conference Proceeding
Citation:
Website Proceedings of the 11th International Conference on Urban Drainage, 2008, pp. 1 - 8
Issue Date:
2008-01
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The infiltration facilities on a side of the road along with a sewage system have been constructed in 80âs in highly urbanized residential area in Tokyo. Sediment samples deposited frequently during wet weather periods in infiltration soakaways were collected and heavy metals (Cr, Mn, Co, Ni, Cu, Zn and Pb) were analyzed. Wide range of spatial variation in heavy metals contents was found in the area. Spatial variation of the contents of individual soakaway specific in deposition of metals reflecting the nature of diffuse urban pollution complexity. The content of heavy metals in lower sediment layer of infiltration soakaway was low compared to the upper sediment layer. Heavy metals speciation analysis revealed possible release of heavy metals from the sediments in the lower layer with time possibly due to slow changing sediment environment.
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