Method for repairing copper and zinc compound contaminated soil in urban relocation land by using woody plants
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A technology of compound pollution and woody plants, applied in the restoration of polluted soil and other directions, can solve the problem that the method of repairing copper and zinc compound polluted soil cannot adapt to and meet the problems of ecological restoration and landscape construction of urban heavy metal polluted sites, and achieve environmental protection. Economic effect, technical effect obvious effect
Inactive Publication Date: 2019-08-23
SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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[0008] The object of the present invention is to provide a method for utilizing woody plants to restore copper and zinc composite polluted soil in urban relocation sites. The method for utilizing woody plants to repair copper and zinc composite contaminated soil in relocation sites will solve the problem of the prior art The method of remediating copper and zinc compound polluted soil is far from being able to adapt to and meet the technical problems of ecological restoration and landscape construction of urban heavy metal polluted sites
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Embodiment 1
[0013] Example 1 Analysis of the combined pollution degree of copper and zinc in the polluted soil of the urban relocation site
[0014] Using HNO 3 -HClO 4 Systematic digestion and atomic absorption spectrophotometry on Cu in urban typical copper and zinc polluted site soil 2+ , Zn + For content determination, single factor index method and Nimerow comprehensive pollution index method are used for analysis and evaluation.
[0015] The single factor pollution index refers to P i =C i / S i , where: P i is the single factor pollution index, i is the pollutant in the soil; C i Represents the measured value of soil pollutant i; S i Represents the initial pollution critical value of pollutant i in the soil, and the single-factor pollution index grading standard is: P i i i i ≥3 heavy pollution.
[0016] The Nimerow Composite Index refers to P 综 =[(P MAX 2 +P AVE 2 ) / 2] 1 / 2 , where: P MAX is the maximum value among all heavy metal element pollution indices; P AVE i...
Embodiment 2
[0043] The preparation of embodiment 2 special fertilizers
[0044]Poplar, camphor tree, Magnolia Magnolia, Magnolia, privet, paper tree, crape myrtle, red leaf plum, pomegranate, hackberry, mulberry, sycamore, zelkova, papaya, cherry blossom, juniper, cedar or elm planted in embodiment 1 The pruned branches and natural fallen leaves are air-dried and burned, and then the ash is dissolved in water and filtered. The filtrate contains trace element Cu 2+ , Zn + . Diluted into a liquid fertilizer (plant nutrient solution) compounded with different concentrations of trace elements, it is used to supplement inorganic nutrients during plant growth and development.
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Abstract
The invention provides a method for repairing copper and zinc compound contaminated soil in urban relocation land by using woody plants. One or two or more of poplar, camphor trees, Magnolia grandiflora, Magnolia denudata, ligustrum lucidum Ait, Broussonetia papyrifera, Lagerstroemia indica, Prunus Cerasifera, pomegranate trees, hackberry, mulberry trees, plane trees, Zelkova schneideriana, papayatrees, Cerasus yedoensis, Chinese juniper, cedar and elm are adopted, and are planted in the copper and zinc compound contaminated soil. The invention also provides a fertilizer. Pruned branches andleaves or natural fallen leaves of the trees planted in the copper and zinc compound contaminated soil are collected, air-dried and burned, ash obtained after the burning is dissolved in water, the obtained solution is filtered, and the filtered solution is used as the liquid fertilizer after being diluted. The plants are planted in the copper and zinc combined contaminated soil to purify the soil. The pruned branches and leaves or natural fallen leaves of the planted and survived trees are burned and then dissolved in the water, and the obtained solution is used for supplementing inorganic nutrients in the growth and development process of the plants as the liquid fertilizer, so the method is environmentally friendly and economical.
Description
[0001] Technical field: [0002] The invention belongs to the field of soil treatment, and relates to a method for treating polluted soil, in particular to a method for using woody plants to restore copper and zinc composite polluted soil in urban relocation sites. [0003] Background technique: [0004] With the acceleration of urbanization and the improvement of the requirements for urban environmental quality, the ecological restoration and redevelopment of urban relocation sites represented by industrial wasteland are becoming more and more urgent. [0005] One of the main methods of ecological restoration in urban relocation sites is phytoremediation. Soil heavy metal ion enrichment plants are the main body of phytoremediation. At present, more than 450 kinds of heavy metal ion hyperaccumulator plants have been reported, most of which are herbaceous plants, most of which exist in wild mining or smelting areas, and have slow growth rates and low biomass. The removal effic...
Claims
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Application Information
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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 张浪张冬梅有祥亮罗玉兰尹丽娟
Owner SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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