Measurement of cadmium, arsenic, nickel and lead elements in Mentha piperita and Portulace oleracea in soils of Dezful and Hamidiyeh from Khuzestan province

Increasing the concentrations of heavy metals in the soil during the last decades to reduce the quantity and quality of plant production and human health is endangered. This study aimed to monitoring arsenic and nickel in the Portulaca oleracea and Mentha piperita of agricultural land in Hamidieh and Dezful from Khuzestan province. Sampling with 9 vegetable samples from three areas with three replications in each city. The concentration of heavy metals were measured after sample preparation by graphical furnaces. Arsenic levels of Portulaca oleracea and Mentha piperita in two regions of Dezful and Hamidieh significant difference (P0.05). The highest concentration of nickel in Mentha piperita of Dezful were (22.20±0.03 ppb) and the lowest this element in Portulaca oleracea of Hamidieh (9.04±0.07 ppb). According to the results the amount of arsenic and nickel in vegetables, Portulaca oleracea and Mentha piperita lower than World Health Organization standards, respectively.