Research on the Arsenic and Cadmium-fixing Effects of Ameliorant in Combined Contamination Soils

摘要

This article studied the effects of chemical fixation with magnesium oxide, calcium oxide, aluminum oxide, ferrous sulfate+calcium oxide in situ on Arsenic and Cadmium combined contamination soils. The results indicate: Four agents have well fixation effects, and the fixation effect of ferrous sulfate and calcium oxide mix- restoration is the best. However, it increases the leaching toxicity of Cadmium;;Aluminum oxide also has a certain fixation effect on Arsenic, but it strengthens the leaching toxicity of Cadmium in acidity condition;;the fixation in situ effects of magnesium oxide and calcium oxide on Arsenic and Cadmium combined contamination soils, which dramatically decreases the leaching toxicity of Arsenic and Cadmium and makes two pollution elements co-stabilized.