
Figure 3. The concentration of heavy metal element Cr versus time. Note: 8.4.3.2 in the figures means that
cement, bentonite, quicklime and coal ash respectively account for 8%, 4%, 3% and 2% in the solidified body,
the same below.
Figure 4. The concentration of heavy metal element Cu versus time.
greatly with the increasing percentage of cement, the content of Cr in soil will also increase as
there is much Cr contained in a large amount of cement, which may cause secondary pollution and
high soil pollution control costs but poor economic benefit.
Figure 4 shows the concentration of Cu in the leaching solution during the first three days is
higher