Abundant aromatic fractions were detected in oils from the Linnan subsag, including aphthalenes, phenanthrenes, triaromatic steroids, biphenyl, fluorenes, diben
Heavy metal pollution in agricultural soils has serious negative influence on human health.Concentrations of Cd,Hg,As,Pb,Cr,Cu,Zn,and Ni in top soils(0-20 cm)of