United stable mineralizing repairing agent for treating soil with combined pollution of Pb, As, Cu, and Cd and application method of repairing agent

Abstract

The invention discloses a united stable mineralizing repairing agent for treating soil with combined pollution of Pb, As, Cu, and Cd and an application method of the repairing agent. The united stable mineralizing repairing agent comprises the following raw materials of 10-20wt% ammonium dihydrogen phosphate water solution, 15-25wt% ferrous sulfate water solution, 0.1-5wt% anionic polyacrylamide water solution and a cement curing agent; the raw materials are added according to a proportion and a successive sequence, so that the united stable mineralizing repairing agent is formed. The united stable mineralizing repairing agent provided by the invention achieves the purpose for processing the soil with the combined pollution of Pb, As, Cu, and Cd by adopting synergistic effects of chemistry stabilization, physical absorption, bridging and cement solidification, and a discharging requirement of a national standard is met; the materials for preparing the united stable mineralizing repairing agent are easy to get, the price is low, the use and the operation are easy, and the effect of the comprehensive treating on heavy metal combined pollution soil is good.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a combined stable mineralization restoration agent for treating Pb, As, Cu, and Cd compound polluted soil and a method for using the same. Background technique [0002] With the continuous expansion of industrial production capacity, soil pollution is becoming more and more serious. Under the condition of high pH value, especially the soil polluted by Pb, As, Cu, Cd and other heavy metals, it will cause great harm to human health. , even life-threatening. Therefore, the treatment means and methods of heavy metal complex pollution are technical problems to be solved urgently at this stage. In the prior art, the commonly used treatment method is the chemical precipitation method. As a main treatment method for arsenic-containing wastewater, engineering is relatively common, that is, a large amount of chemical agents are added to the wastewater and precipitated in ...

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Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention aims to provide a joint stable mineralization restoration agent and its application method for controlling Pb, As, Cu, Cd composite polluted soil, which solves the problem of secondary pollution caused by waste residue in the prior art. Secondary pollution, and the technical problem that the heavy metal compound polluted soil cannot be effectively and comprehensively treated at the same time

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