Linkage stabilizing agent for repairing heavy metal contaminated soil and repairing method
A technology for polluted soil and heavy metals, which is applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc. Long-term, low construction cost, small addition ratio
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Embodiment 1
[0033] The implementation is as follows:
[0034] (1) First mix the mixed agent of ferrous sulfate and montmorillonite (one dose) into one dose according to the mass ratio: soil = 2.5:100 (ferrous sulfate 2, montmorillonite 0.5) and stir for reaction, and curing 20min;
[0035] (2) Mix sodium sulfide, calcium hydroxide, calcium oxide and silicon dioxide mixed agent (two doses) into two doses according to the mass ratio: soil = 2:100 (sodium sulfide 1, calcium hydroxide 0.5, calcium oxide 0.25, silicon dioxide 0.25) stirring reaction, and curing 1d;
[0036] (3) Adopt "Diphenylcarbahydrazide Spectrophotometric Method for Determination of Hexavalent Chromium in Solid Waste" (GB / T15555.4-1995), "Atomic Absorption Spectrophotometric Method for Determination of Water Quality Copper, Zinc, Lead and Cadmium" ( GBT7475-87) To test the heavy metal leaching toxicity of the cured samples.
[0037] The results show that the leaching concentrations of heavy metals in the treated samples...
Embodiment 2
[0039] The implementation is as follows:
[0040] (1) First mix ferrous sulfate and montmorillonite (one dose) in a mass ratio of one dose: soil = 1:100 (ferrous sulfate 0.7, montmorillonite 0.3) and stir for reaction, and curing 20min;
[0041] (2) Mix sodium sulfide, calcium hydroxide, calcium oxide and silicon dioxide mixed agent (two doses) into two doses according to the mass ratio: soil = 1.5:100 (sodium sulfide 0.8, calcium hydroxide 0.3, calcium oxide 0.2, silicon dioxide 0.2) stirring reaction, and curing 1d;
[0042] (3) Adopt "Diphenylcarbahydrazide Spectrophotometric Method for Determination of Hexavalent Chromium in Solid Waste" (GB / T15555.4-1995), "Atomic Absorption Spectrophotometric Method for Determination of Water Quality Copper, Zinc, Lead and Cadmium" ( GBT7475-87) To test the heavy metal leaching toxicity of the cured samples.
[0043] The results show that the leaching concentrations of heavy metals in the treated samples are 1.05mg / L of hexavalent chr...
Embodiment 3
[0045] The implementation is as follows:
[0046] (1) First, mix ferrous sulfate and montmorillonite (one dose) in a mass ratio of one dose: soil = 2.3:100 (ferrous sulfate 1.5, montmorillonite 0.8) and stir for reaction, and curing 20min;
[0047] (2) Mix sodium sulfide, calcium hydroxide, calcium oxide and silicon dioxide mixed agent (two doses) into two doses according to the mass ratio: soil = 1:100 (sodium sulfide 0.5, calcium hydroxide 0.25, calcium oxide 0.13, silicon dioxide 0.12) stirring reaction, and curing 1d;
[0048] (3) Adopt "Diphenylcarbahydrazide Spectrophotometric Method for Determination of Hexavalent Chromium in Solid Waste" (GB / T15555.4-1995), "Atomic Absorption Spectrophotometric Method for Determination of Water Quality Copper, Zinc, Lead and Cadmium" ( GBT7475-87) To test the heavy metal leaching toxicity of the cured samples.
[0049] The results show that the leaching concentrations of heavy metals in the treated samples are 0.07mg / L of hexavalent...
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