Review on heavy metals,soil environment quality and food safety

Of all the elements,the most important ones related to food-chain contamination are arsenic(As),cadmium(Cd),mercury(Hg),lead(Pb),and selenium(Se).This paper reviews the connotation of soil environmental quality,discusses the present status, characteristics,sources of heavy metal pollution as well as the relationship between heavy metal and food safety,and presents the methods of heavy metal pollution control.