Track trace element zinc, Iron, Lead and copper using duckweed Lemna ssp. into the food chain and test safety food to human in the end of chain

	Track trace element zinc, Iron, Lead and copper using duckweed Lemna ssp. into the food chain and test safety food to human in the end of chain
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 12, Issue 2, 2012, Pages 85-97
Abstract
Abstract The experiment was conducted in an ideal field of non-fully control studying the impact of the arbitration included duckweed plant Lemna ssp. to remove the dissolved trace element (zinc, iron, lead and copper) from waste water of dairies products factory adopted in a period of ten days. The results revealed the treatment of duckweed plant with wet weight 5g/l and another treatment (control) without plant in dairy factorywaste water, noted devaluation at significant p<0.05 of the total removal with the plant and without to elements, zinc, 92.31, 76.92%, iron, 31.25, 62.50%,lead 90.00, 90.00% and copper 27.78, 16.67% within tenth day respectively, the concentration of zinc, lead, and copper in duckweed plant before and after treatment in dairy waste water was part of the natural concentration of the plant except for iron increased concentration on natural 459.1 mg/kg in two treatments before and after treatment amounted 889.76, 1400.89 mg/kg, the concentration of metals in the plant after the treatment was higher than the concentration before treatment also increased the concentration element in the plant after the transaction is twofold concentration on the treatment so zinc increased by 3.86 time, iron 1.57 time , lead, 1.15 time, the copper 1.87 time. As well as contribute to the plant of duckweed components of fish fed-stuff to reduce the heavy concentration of zinc, lead, copper was concentrated in the plant is less toxic concentration of fish except iron is 1511.10 mg/kg was the highest concentration of poisonous fish, which is 140.00 mg/kg, the focus of heavy elements in the plant were less than focus fed-stuff elements in comparison with the exception of iron was concentrated 937.10 mg/kg. Expected to be the concentration of heavy metal elements of the study in fish muscle feeders to fed-stuff fish, which is installed in the duckweed which grew on dairy factory wastewater and fed-stuff comparison less than the limit covered by human, prefers used determinate rate from duckweed in bramble.
Keywords
element zinc; iron; safety food

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