变浓度下沉积物中Cr形态及含量分析

o investigate the transformation of exterior heavy metal in sediments, specification analysis was used to study the alteration of Cr content and migration in sediments. A serial of Cr solution were added into the upload water-sediments for three days. The Cr content was determined in the three extractable steps of BCR and the residues, and the distributions of Cr in the four stages were analyzed. The results showed that, the Cr concentration in sediments increased with the increase of the exterior Cr concentration. The content of Cr increased rapidly in the low concentration but slowly in high concentrations. In addition, the transformation of Cr in different specification tend to stable status.