A compound improver for vanadium-contaminated soil and its preparation method and improvement method
A technology of improving agent and vanadium pollution, which is applied in the field of compound improving agent and preparation of vanadium-contaminated soil, to achieve the effect of being convenient for commercial promotion and application, beneficial for improvement and restoration, and improving soil structure
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Embodiment 1
[0032] Present embodiment is a kind of composite improver for vanadium-contaminated soil, and it is made by each component according to following weight ratio: A component: macromolecular organic matter polyacrylamide (PAM) 0.003g, flue gas desulfurization gypsum 0.11g; B component: compost sludge 22.73g, sodium-based modified bentonite 7.27g.
[0033] The preparation method of the B-group compound improver for vanadium-contaminated soil is prepared by the following steps:
[0034] Step 1: Stir compost sludge and sodium-based modified bentonite in a beaker for 10 minutes, then move to a crusher for uniform crushing.
[0035] Step 2: Extrude and granulate in an extrusion granulator. The obtained is the soil conditioner of group B used in the laboratory, and it is ready for use (the laboratory does not sieve the shape).
[0036] The improvement method of applying the soil compound improver to vanadium-contaminated soil: take 250g of mixed soil in a plastic cup, apply 2.2g of g...
Embodiment 2
[0038]Present embodiment is a kind of composite improver for vanadium-contaminated soil, and it is made by each component according to following weight ratio: A component: macromolecular organic matter polyacrylamide (PAM) 0.004g, flue gas desulfurization gypsum 0.21g; B component: 2.5g of the B group improver prepared in Example 1.
[0039] The improvement method of applying the soil compound improver to vanadium-contaminated soil: take 250g of the compound soil in a plastic cup, apply the compound improver of group B to the soil, till and mix, and then sprinkle the improver of group A on The soil surface was sprinkled with water, and the water content measured after 2 days was 5.32%, which was treatment 3. In treatment 3, 50 grains of spring wheat were sown, covered with soil with a thickness of 1.2 cm, poured 50 ml of deionized water, placed in an artificial climate box, poured 100 ml of pure water every other day, and cultivated for 15 days. Determination of soil moisture...
Embodiment 3
[0041] This example is a kind of composite improver for vanadium-contaminated soil: Group A: 0.005 g of polymer organic polyacrylamide (PAM), 0.31 g of flue gas desulfurization gypsum; Group B: the improvement of Group B obtained in Example 1 Dose 3.0g.
[0042] The same implementation method as in Example 2, the experimental treatment is set as treatment 4.
[0043] Such as figure 1 Shown is the soil water content curve chart of experimental treatment 1, 2, 3, 4 measured in the embodiment, as can be seen from the figure: after adding compound improver, the water content of the soil of experimental treatment 2, 3, 4 The rate was increased by 1.07 times, 0.60 times and 0.49 times respectively compared with the control treatment 1. Experimental treatment 2 can significantly improve the water retention effect of the soil.
[0044] Such as figure 2 Shown, is the soil pH figure that records experimental treatment 1,2,3,4 in the embodiment, as can be seen from the figure: after...
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