Abstract
Effect of municipal solid waste application on heavy metal distribution in different parts of wheat plant
Highlights
The health risk index values for each metal ranges from 0.01573 to 0.035067 for Zn, 0.139953 to 0.262767 Co, 6.624 to 8.831 for Cd and 0.057577 to 0.169517 for Fe while the patterns of health risk index in all treatments was found in following order: Cd>Co>Fe>Zn
The aim of current research was to determine the contents of heavy metal in different varieties of wheat (Triticum aestivum) that was grown on irrigated soil and to estimate the health risk in human caused by the consumption of contaminated wheat crop
The results showed the effect of municipal solid waste on different parts of plants due to this heavy metal content of soil which exerts toxic effects on plants
Summary
Shoot ANOVA revealed the insignificant effect (P>0.05) of all trials on the concentration of heavy metals like Zn, Co, Fe and Cd in shoot of wheat variety (Faislabad-08) (Table 2).The sequence of concentrations of heavy metals in shoot of wheat at T-1 was: Fe>Zn>Cd>Co, at T-2 and T-3 was: Fe>Zn>Co>Cd and at T-4 was: Zn>Fe>Cd>Co. Grains Analysis of variance demonstrated the nonsignificant effect (p>0.05) of all treatments on the concentrations of heavy metals (Zn, Cd, Co and Fe) in grains of wheat variety (Faislabad-08) (Table 2). The concentrations of heavy metals ranges from1.09 to 2.43 for Zn, 1.39 to 2.61 for Co, 1.53 to 2.04 for Cd and 9.31 to 27.41 for Fe correspondingly. The direction of absorptions of dense metals at trial-1 was Fe>Cd>Co>Zn, at T-2 was Fe>Zn>Co>Cd, at T-3 and T-4 was Fe>Co>Zn>Cd. Zn and Cd concentrations were lower and Fe concentration was higher among the all treatments (Table 3). FAO/WHO [30] recommended the permissible limits for all heavy metals except Cd because its mean concentration in grains was above than the 0.2 mg-kg-1. Significant and positive correlation suggested the strong impact of organic matter on the heavy metals [52]. Positive and significant correlation of Zn was recommended by the Meng et al [52]
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