Ecological Restoration Research Of Lead/Zinc Tailings

Uncontrolled exploitation of mineral resources bring about economic profits formankind as well as human, buried the seeds of safety concerns for the environment.Every day the land destruction and pollution in the report. Lead-zinc tailings nutrientcontent is low, poor physical structure, a high content of heavy metals and heavy metalscompound pollution factors constitute important problems of ecological restoration inmetallic ore districts. Comprehensive utilization of natural resources, such as sewagetreatment plant sludge problem has become the focus. This study selected lead-zinctailings Guo Gutun Long Hua Town in Cheng De city as the research object, by addingthe maize straw, to the two kinds of modifier, CK (control) is studied and appliedconcentration0.2%,0.5%,1.0%,2.0%,5.0%of the amendment of lead-zinc tailings pH,available nutrient and Lead, zinc, Cu, Cd combined forms of four kinds of metal. In orderto find the obstacle factors of lead and zinc tailings ecological restoration, select theappropriate modifier types and dosage, best for straw and excess sludge resourcesreasonable use and lead-zinc tailings improvement to provide theoretical reference.The research results show that under the condition of not applying improver, lead-zinc tailings and available nutrients through their own repair function of the pH value ofthe improved slightly; Imposed after the amendment, maize straw and pH of tailings andavailable nutrients have improvement effect, and as the concentration increases obviously.Lead-zinc tailings of Pb with recent order of Cu and Cd in four kinds of metal andstability is zinc> Cd> Cu> Pb. On the whole, The addition of two kinds of modifier onthe four kinds of metal is effective to some extent passivation effect, the effect of thesludge is superior to the effect of straw.Applying concentration was1.0%vetiver straw biomass of perennial ryegrass inmaximum in straw modified tailings. Sludge applying two kinds of plant biomass appearwhen concentration of2.0%maximum in Sludge improved tailings.At the same time considering the different dosage of corn straw, excess sludge oflead-zinc tailings available nitrogen, potassium combined forms, improve the effect andfour kinds of metal when determining the concentration of2.0%corn stalk imposedeffect is excellent, excess sludge concentration was1.0%has a better effect.