Trace dement content of water spinach (Ipomoea aquatica), fish and sediment from the wastewater exposed wetland Boeng Cheung Ek, Phnom Penh, Cambodia
Boeng Cheung Ek wetland is extensively used for production of the aquatic vegetable water spinach and fishing. The lake receives about 90％ of the citys wastewater at two entry points, Trabek and Tompun pumping stations. Water spinach and sediment sampies collected along two transects downstream from the pumping stations had up to five times higher concentrations of Al, Be, CA, Ce, Er, Fe, La, Li, Nd, Ni, Pb, Pr, Sb, Sm and Zn at the pumping station compared to the lake outlet. Elevated trace element concentrations were seen to a distance of 50 to 600m from Trabek pumping station. The highest observed water spinach concentrations of CA, Cu, Pb and Zn of 0.022, 2.95, 0.206 and 9.08mg·kg<-1> fresh weight (f. w. ), respectively did not constitute a food safety problem. However, consumption of 125g water spinach per day will result in an As and Fe intake corresponding to 24％ and 85％ of the daily tolerable intake.
Trace elements food safety wastewater water spinach wetland
H. Marcussen A. Dalsgaard P. E. Holm
Departments of Natural Sciences Faculty of Life Science, University of Copenhagen, Thorvaldsensvej 4 Departments of Veterinary Pathobiology, Faculty of Life Science, University of Copenhagen, Thorvalds
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
89-90
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）