DISTRIBUTION OF HEAVY METALS IN THREE SOIL TYPES AND IN CORN PLANTS AT WESTERN AREA OF NILE ELTA | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 2, Volume 27, Issue 12, December 2002, Page 8713-8734 PDF (608.99 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2002.255930 | ||||
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| Author | ||||
| A. A. Abdel Salam | ||||
| Soil and Water Sci. Department, College of Agriculture, Alexandria University, Alexandria 21545, Egypt. | ||||
| Abstract | ||||
| Eighty soil samples (0-15cm and 15-30cm) and the corresponding 40 samples of leaves and grain of corn plants were collected from three different sites at western Nile Delta of Egypt. The objectives of this study were to investigate the total and bioavailable levels of Cu, Zn, Mn, Fe, Cr, Ni, Cd, and Pb in soils,metals contents in leaves and grains of corn plant grown on these soils and to interelate these levels with each other and with some soil properties. Both total (aqua regia soluble) and available (DTPA–extractable) amounts of metals in the soils were determined. The mean values of total metal content amounts (mg Kg-1 soil) in the surface soil(0-15cm) of Abou Hommos, Abis and North Tahrir were for Cu as 26.8, 25.5, and 13.7, for Zn as 82.0, 84.6 and 60.0 for Mn as 573, 796 and 395, for Fe as 6793, 7766 and 18942 for Cr as 27.3, 28.3 and 57.3 for Ni as 39.8, 46.7 and 27.6 for Cd as 0.12, 0.13 and 0.20 and for Pb as 7.7, 8.0 and 8.2, respectively. The data showed that the amounts of DTPA- extractable metals were in the normal range for agricultural soils except for cadmium which was higher than the normal level. The data showed that Cd was the most mobile metal, implying that it is more bioavailable than Pb, Ni, and Cr. The amounts of DTPA- extractable Cd, Cr, Zn, Mn and Cu were positively and significantly correlated with their total contents in soils. In addition, clay content of soils significantly and positively correlated with DTPA-Cu and with Tot. Cu, Zn, Mn and Ni in soils. The amounts of Cu, Fe, and Pb in the leaves and grain of corn plants were positively and significantly correlated with their DTPA extractable amount from soils. The highest values of both the calculated bioconcentration ratio (BCR) and transfer coefficients (TC) were recorded for Cd and Zn. The data also showed that Cd had the highest relative mobility (RM) in the investigated soil relative to the other metals. | ||||
| Keywords | ||||
| Heavy metals; Bioconcentration ratio; transfer coefficient; relative mobility | ||||
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