investigating the effect of dimercaprol on phytoremediation of lead by zea mays,

application   of plants to remove heavy metals from soil (phytoremediation) is   expanding due to its cost-effectiveness as compared to conventional methods   and it has shown a great potential. since contaminants such as pb have a   limited bioavailability in the soil, methods to facilitate their   translocation to the shoots and roots of plants are required for efficient   phytoremediation. the present pots experiment were to investigate the effect   of dimercaprolchelator with different concentration (0, 1.5, 3 mmol dimercaprolchelator   kg -1 ). also different ranges of pb (100, 200 mg pb   kg -1 ) and a control group were investigated for the amount of pb   accumulation, by corn ( zea mays ), sunflower ( helianthus annuus )   and mustard ( sinapis arvensis ). the results showed that the amount of   pb accumulation increased as the pb concentration was increased. also the   results of this experiment showed that the addition of dimercaprolchelatoris   most likely to increase the bioavailability of pb and consequently the   accumulation of this heavy metal in the shoots. the highest accumulation of   pb was noticed with the highest does of dimercaprolchelator (3 mmol   dimercaprolchelator kg -1 ) and pb (200 mg pb kg -1 ) in   the shoots of helianthus annuus .