Remediation method for acid heavy metal contaminated soil
A remediation method, a technology for polluted soil, applied in the restoration of polluted soil, etc., to achieve the effect of low cost, low water and fertilizer management requirements, and high maintainability
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Embodiment 1
[0015] Example 1 Screening of acid polymetallic tolerant energy plants
[0016] According to the literature reports and the preliminary experiments of the research group, combined with the natural conditions, pollution degree and restoration potential of the Dabaoshan mining area, five energy plants of jatropha curcas, tung tree, castor, sunflower and camellia oleifera were selected as test materials. The metals were artificially added for culture, and the root length, root weight, fresh weight, biomass, photosynthetic rate and other indicators were selected to comprehensively judge the tolerance of the five energy plants. -1 ) and Cd (400 mg·kg -1 ) tolerance; Tung tree and camellia oil to Al (3000 mg·kg -1 ), Cu (600 mg·kg -1 ) and Zn (2000 mg·kg -1 ) has strong tolerance; Jatropha curcas has strong tolerance to Al, Cd, Pb, Cu and Zn.
Embodiment 2
[0017] Example 2 Verification of indoor potted plants
[0018] In March 2009, the acidic polymetallic contaminated soil was collected from the Dabaoshan wasteland and transported back to the laboratory, and the restoration potential of Jatropha curcas was verified by pot experiments indoors. Tolerance verification is carried out according to three pollution gradients of low pollution, medium pollution and high pollution. The results after one year showed that Jatropha curcas can grow well in soils with low, medium and high pollution levels.
Embodiment 3
[0019] Example 3 Dabaoshan Site Restoration
[0020] After leveling the acidic polymetallic polluted soil, transplant Jatropha curcas seedlings with a height of 30 cm, and plant 280-300 trees per mu. Water when planting, and no special management is required later.
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