1 results about "Pentavalent Antimony" patented technology

The present application relates to the technical field of contaminated soil remediation, and discloses a composite reagent for neutralization and passivation remediation of antimony mine acid soil and application thereof, which comprises finely ground blast furnace slag powder, ferrous sulfate heptahydrate and carbide slag. The present application utilizes the solid phase micro-interface acid etching mechanism among the components to pre-activate the alumina tetrahedral site on the surface of the slag, eliminate the hydration induction period, and solve the kinetic mismatch problem caused by the difference in dissolution rate of the easily soluble iron salt and the insoluble slag in the soil remediation process. The present application builds a crystalline environment of poor sulfur calcium aluminate, makes the antimony acid root ions in the soil enter the mineral lattice as a structural replacement component, realizes atomic-level chemical solidification of the antimony pollutants, reduces the antimony leaching concentration of the remediated soil under the condition of acid rain leaching, and utilizes the trace reducing components of the carbide slag to synergistically inhibit the generation of highly toxic pentavalent antimony, thereby realizing long-term and safe remediation of the acid soil.