Effect of Ca on forms distribution of Cr and Cu

up-transport release process of Cr and Cu in dynamic running-water circumstance

and release of Cu in impoundment circumstance

were studied in this paper. The results showed that the amount of Cr and Cu form 1~#

2~#

3~#

5~# increased

while form 4~#

6~# decreased with increase of Ca-loading. And there is an inclination of up-transport release of Cr and Cu when the covered water changes to clear

but the rate of release is very slow. The concentration of Ca and pH influence the release amount of Cu to some degree.