Heavy metal refers to any metal element with a density above 4.5 g/cm 3 , such as cadmium (Cd), mercury (Hg), lead (Pb), copper (Cu), zinc (Zn), chrome (Cr), nickel (Ni), antimony (Sb), and arsenic (As) [1][2]. Elevated heavy metal content in soil has a huge impact on the growth of plants, including changes in the appearance of the plants (such as color, leaf shape, and size) and even death [3]. Heavy metal pollution in soil has become a worldwide environmental problem,