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Influence of Sewage Irrigation on the Heavy Metal Content of Soil and Crops


Affiliations
1 School of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi’an 7100481, China
2 North China University of Water Resources and Electric Power, Zhengzhou 450045, China
3 Shandong Survey and Design Institute of Water Conservancy, Shandong 250013, China
 

The paper deals with irrigation tests on farmlands by using different water-quality sewages, and researches on the distribution characteristics of various heavy metals (Pb, Cu, Zn and Cd) in soil on vertical direction after irrigation by different sewages, and the regularities of distribution of various heavy metals in different parts of wheat and corn. The results show that the contents of various heavy metals in soils of different irrigation areas are successively as follows: the industrial sewage irrigation area > the mixed sewage irrigation area > the domestic sewage irrigation area > the reclaimed water irrigation area. In different irrigation areas, the regularities of distribution of the contents of various heavy metals in wheat and corn are as follows: the content in the reclaimed water irrigation area is less, next is in the domestic sewage irrigation area, the contents in the mixed sewage irrigation area and the industrial sewage irrigation area are more. For the ischolar_mains, stems and grains of wheat and corn in different irrigation areas, the contents of various heavy metals in them are increasing continuously with the increase of heavy metals in soil; and for the same irrigation area, the contents of heavy metals in the ischolar_mains, stems and grains of wheat are higher than contents of Pb and Cd in grains of corn, which have exceeded National Food Safety Standards.

Keywords

Sewage Irrigation, Heavy Metals, Soils, Crops.
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  • Influence of Sewage Irrigation on the Heavy Metal Content of Soil and Crops

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Authors

Xiuli Li
School of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi’an 7100481, China
Daoxi Li
North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Dedong Liu
Shandong Survey and Design Institute of Water Conservancy, Shandong 250013, China
Liangjun Fei
School of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi’an 7100481, China

Abstract


The paper deals with irrigation tests on farmlands by using different water-quality sewages, and researches on the distribution characteristics of various heavy metals (Pb, Cu, Zn and Cd) in soil on vertical direction after irrigation by different sewages, and the regularities of distribution of various heavy metals in different parts of wheat and corn. The results show that the contents of various heavy metals in soils of different irrigation areas are successively as follows: the industrial sewage irrigation area > the mixed sewage irrigation area > the domestic sewage irrigation area > the reclaimed water irrigation area. In different irrigation areas, the regularities of distribution of the contents of various heavy metals in wheat and corn are as follows: the content in the reclaimed water irrigation area is less, next is in the domestic sewage irrigation area, the contents in the mixed sewage irrigation area and the industrial sewage irrigation area are more. For the ischolar_mains, stems and grains of wheat and corn in different irrigation areas, the contents of various heavy metals in them are increasing continuously with the increase of heavy metals in soil; and for the same irrigation area, the contents of heavy metals in the ischolar_mains, stems and grains of wheat are higher than contents of Pb and Cd in grains of corn, which have exceeded National Food Safety Standards.

Keywords


Sewage Irrigation, Heavy Metals, Soils, Crops.