A kind of washing agent and its application method for repairing cu, pb, as compound polluted soil
A technology of compound pollution and leaching agent, applied in the field of contaminated soil remediation, can solve problems such as unsatisfactory removal effect, and achieve the effects of low As removal rate, promotion of transfer, promotion of sedimentation and filtration
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Embodiment 1
[0035] Removal Efficiency of EDTA to Three Heavy Metal Compound Polluted Soils
[0036] The steps are as follows:
[0037] (1) Prepare eluting solutions containing different concentrations of EDTA, the concentrations are 0.01mol / L, 0.02mol / L, 0.03mol / L, 0.04mol / L, 0.05mol / L;
[0038] (2) Take heavy metal-contaminated soil and measure the content of Cu, Pb, and As in the soil;
[0039] (3) Sieve the soil particles with water, remove the sundries, and remove the soil with larger particles;
[0040] (4) Send the treated sieved soil to the leaching tank, inject the eluent and stir it for 10-12 hours, settle for 2-4 hours, collect the eluent and enter the recovery system for recycling;
[0041] (5) Test the soil after washing until the test result is qualified;
[0042] (6) Measure the content of Cu, Pb and As in the qualified soil, and calculate the removal rate.
[0043] The specific results are attached figure 1 shown by the attached figure 1 From the data in the figure, i...
Embodiment 2
[0045] The Removal Efficiency of Tween-80 to Three Heavy Metal Compound Contaminated Soils
[0046] The steps are as follows:
[0047] (1) Prepare leaching solutions containing different concentrations of Tween-80, the mass concentrations are 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% respectively;
[0048] (2) Take heavy metal-contaminated soil and measure the content of Cu, Pb, and As in the soil;
[0049] (3) Sieve the soil particles with water, remove the sundries, and remove the soil with larger particles;
[0050] (4) Send the treated sieved soil to the leaching tank, inject the eluent and stir it for 10-12 hours, settle for 2-4 hours, collect the eluent and enter the recovery system for recycling;
[0051] (5) Test the soil after washing until the test result is qualified;
[0052] (6) Measure the content of Cu, Pb and As in the qualified soil, and calculate the removal rate.
[0053] The specific results are attached figure 2 shown by the attached figure 2 It can be known ...
Embodiment 3
[0055] Removal Efficiency of SDS on Three Heavy Metal Compound Contaminated Soils
[0056] The steps are as follows:
[0057] (1) Prepare washing solutions containing different concentrations of SDS, the mass concentrations are 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% respectively;
[0058] (2) Take heavy metal-contaminated soil and measure the content of Cu, Pb, and As in the soil;
[0059] (3) Sieve the soil particles with water, remove the sundries, and remove the soil with larger particles;
[0060] (4) Send the treated sieved soil to the leaching tank, inject the eluent and stir it for 10-12 hours, settle for 2-4 hours, collect the eluent and enter the recovery system for recycling;
[0061] (5) Test the soil after washing until the test result is qualified;
[0062] (6) Measure the content of Cu, Pb and As in the qualified soil, and calculate the removal rate.
[0063] The specific results are attached image 3 shown by the attached image 3 It can be seen from the data th...
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