In-situ remediation method for soil contaminated by heavy metal chromium ions
A technology for in-situ remediation and polluted soil, applied in the field of soil remediation, can solve problems such as pollution, and achieve the effects of improving soil purification effect, improving use efficiency, and improving adsorption selectivity
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Embodiment 1
[0034] Reference figure 1 with figure 2 , An in-situ remediation method for heavy metal chromium ion contaminated soil, the remediation method includes the following steps:
[0035] The first step is to prepare magnetic nuclear adsorbent, including the following steps:
[0036] (1), spherical γ-Al 2 O 3 Activation of
[0037] Weigh 200ml of deionized water in a beaker, mix with 2% ammonia water as the activator, and then weigh 3 grams of spherical γ-Al 2 O 3 Put it into ammonia water, place it in a 40℃ oven for surface activation for 12 hours, then pour off the ammonia water and remove the spherical γ-Al 2 O 3 Put it in an oven at 40℃ to dry for 4 hours;
[0038] (2) The introduction of ferric nitrate
[0039] Prepare 200ml of 5% ferric nitrate aqueous solution in a beaker, and then combine the spherical γ-Al obtained in step (1) 2 O 3 Put it in a beaker and immerse it at 40°C for 12 hours to obtain spherical γ-Al adsorbing 5% ferric nitrate aqueous solution 2 O 3 , Then put it in an o...
Embodiment 2
[0051] Reference figure 1 with figure 2 , An in-situ remediation method for heavy metal chromium ion contaminated soil, the remediation method includes the following steps:
[0052] The first step is to prepare magnetic nuclear adsorbent, including the following steps:
[0053] (1), spherical γ-Al 2 O 3 Activation of
[0054] Weigh 200ml of deionized water in a beaker, mix with 5% ammonia water as the activator, and then weigh 4.5g of spherical γ-Al 2 O 3 Put it into ammonia water, place it in a 60℃ oven for surface activation for 30 hours, then pour off the ammonia water, and remove the spherical γ-Al 2 O 3 Dry for 8 hours in an oven at 70℃;
[0055] (2) The introduction of ferric nitrate
[0056] Prepare 200ml of 15% ferric nitrate aqueous solution in a beaker, and then combine the spherical γ-Al obtained in step (1) 2 O 3 Put it in a beaker and immerse it at 60°C for 18 hours to obtain spherical γ-Al adsorbing 15% ferric nitrate aqueous solution 2 O 3 , And then place it in an oven ...
Embodiment 3
[0068] Reference figure 1 with figure 2 , An in-situ remediation method for heavy metal chromium ion contaminated soil, the remediation method includes the following steps:
[0069] The first step is to prepare magnetic nuclear adsorbent, including the following steps:
[0070] (1), spherical γ-Al 2 O 3 Activation of
[0071] Weigh 200ml of deionized water in a beaker, mix with 8% ammonia water as the activator, and then weigh 6 grams of spherical γ-Al 2 O 3 Put it in ammonia water, place it in a 80℃ oven for surface activation for 48 hours, then pour off the ammonia water, and remove the spherical γ-Al 2 O 3 Put it in an oven at 100℃ to dry for 12 hours;
[0072] (2) The introduction of ferric nitrate
[0073] Prepare 200ml of 25% ferric nitrate aqueous solution in a beaker, and then combine the spherical γ-Al obtained in step (1) 2 O 3 Put it in a beaker and immerse it at 80°C for 24 hours to obtain spherical γ-Al adsorbing 25% ferric nitrate aqueous solution 2 O 3 , And then dry it ...
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