Method for remediating heavy metal polluted soil comprehensively
A technology of polluted soil and remediation method, which is applied in the field of comprehensive remediation of heavy metal-contaminated soil, can solve problems such as unsuitable for large-scale contaminated soil treatment, unsatisfactory phytoremediation effect, hidden danger of secondary pollution, etc., to achieve easy large-scale promotion, good Environmentally friendly, low-cost effect
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Embodiment 1
[0026] Example 1 A comprehensive remediation method for heavy metal contaminated soil, the steps are as follows:
[0027] (1) Select the heavy metal contaminated soil to be repaired, manually remove weeds and shrubs, apply adequate decomposed organic fertilizers at a rate of 400 kg / mu in late autumn and early winter, and deep plow 35 cm to weather the soil and freeze overwintering pests. The land is ploughed and broken;
[0028] (2) In spring, when the average temperature of the soil is above 10℃ after thawing, transplant the woody fast-growing tree Paulownia white flower with the ability to accumulate heavy metals. The annual seedlings of Paulownia white flower are transplanted by the method of inter-row hole planting, the row spacing is 2.5 meters, the plant spacing is 1.2 meters, and the holes are digging and planting. The hole diameter is 0.5 meters and the hole depth is 0.4 meters. After transplanting, irrigate once permeable to make the roots of the seedlings and the soil m...
Embodiment 2
[0032] Example 2 A comprehensive remediation method for heavy metal contaminated soil, the steps are as follows:
[0033] (1) Select the heavy metal contaminated soil to be repaired, manually remove weeds and shrubs, apply adequate decomposed organic fertilizers at an amount of 800 kg / mu in late autumn and early winter, and deep plow 55 cm to weather the soil and freeze the overwintering pests. The land is ploughed and broken;
[0034] (2) In spring, when the average temperature of the soil is above 10℃ after thawing, transplant the woody fast-growing tree Paulownia white flower with the ability to accumulate heavy metals. The annual seedlings of Paulownia white flower are transplanted by the method of inter-row hole planting, the row spacing is 3.5 meters, the plant spacing is 1.8 meters, and the hole diameter is 0.8 meters and the hole depth is 0.6 meters. After transplanting, irrigate once permeable to make the roots of the seedlings and the soil more closely, cultivate a thin...
Embodiment 3
[0038] Example 3 A comprehensive remediation method for heavy metal contaminated soil, the steps are as follows:
[0039] (1) Select the heavy metal contaminated soil to be repaired, manually remove weeds and shrubs, apply sufficient decomposed organic fertilizers at an amount of 600 kg / mu in late autumn and early winter, and deep plough 45 cm to weather the soil and freeze overwintering pests. The land is ploughed and broken;
[0040] (2) In spring, when the average temperature of the soil is above 10℃ after thawing, transplant the woody fast-growing tree Paulownia white flower with the ability to accumulate heavy metals. The annual seedlings of Paulownia white flower are transplanted by the method of alternate-row hole planting, with a row spacing of 3 meters and a plant spacing of 1.5 meters. The holes are digged for colonization with a hole diameter of 0.6 meters and a hole depth of 0.5 meters. After transplanting, irrigate once permeable to make the roots of the seedlings an...
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