Author_Institution :
Dept. of Biol., Henan Inst. of Educ., Zhengzhou, China
Abstract :
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
To obtain a better knowledge regarding the influence of wastewater-irrigation on agriculture soils and food crops in Zhengzhou, five villages were selected and food crop samples were collected in 2009. The concentrations of seven metals of Cd, Pb, Zn, Cu, Cr, Hg and As were detected. Results showed that the concentrations of Cd, Hg, Zn and Pb in soil samples were a light buildup over the local background levels, and the ratios were 1.26, 1.16, 1.64 and 1.55 respectively, but still met the farmland environmental quality evaluation standards for edible agricultural products. Metal concentrations in food crops were under the permissible limits for food. The trend of bio accumulation factors in vegetables was in the order: Zn>;Cu>; Pb>; Cr, Cd, As and Hg; and in rice crops was Zn>;Cr>;Pb, Cu, Cd and As. All the hazard quotient values of adults and children were less than 1, which indicated that the consumption of food crops grown in wastewater-irrigation soils was nearly free of risks and generally assumed to be safe.
Keywords :
crops; food safety; health hazards; irrigation; soil; wastewater; China; Zhengzhou; agriculture soils; bioaccumulation factors; edible agricultural products; farmland environmental quality evaluation standards; food crop samples; food crops; hazard quotient values; health risks; heavy metals; metal concentrations; permissible limits; rice crops; soil samples; vegetables; wastewater-irrigation soils; Agriculture; Copper; Lead; Mercury (metals); Soil; Zinc;
