METHOD FOR ECOLOGICAL RESTORATION OF GOLD MINE TAILINGS BY LAYERED COVERAGE

摘要

The invention provides an ecological remediation method for layered coverage gold mine tailings, and relates to the technical field of the mine ecological remediation. The provided remediation methodcomprises the following steps: (1) after covering a surface layer of the gold mine tailings by a heavy metal composite passivator, turning over, and spraying 0.8-1.2% of water-soluble carboxymethyl chitosan solution, to obtain a heavy metal passivated restoration substance; and (2) successively covering the heavy metal passivated restoration substance obtained in the step (1) by an obstructing substance, a bio-organic fertilizer and soil, and realizing ecological remediation of the gold mine tailings. The provided ecological remediation method belongs to a physical-chemical-biological combinedremediation method, and is capable of continuously and deeply remedying a heavy metal pollution problem of the gold mine tailings, and breaking through limitation of a current gold mine tailings remediation method that secondary environment pollution is existent, remediation efficiency is low, a remediation period is long and heavy metal pollution in the tailings cannot be continuously and deeplyremedied.