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Method for restoring soil contaminated by heavy metal copper

A technology of heavy metal and copper pollution, applied in the field of soil remediation, can solve the problems of insufficient planting area, long period of fruit production, insufficient biomass of arbor forest leaves, etc. Effect

Inactive Publication Date: 2018-08-14
昆山合纵生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, on the one hand, the biomass of arbor forest leaves is insufficient and the harvesting cost is high; on the other hand, the planting area of ​​Eucommia orchards in China is less than 3,000 hectares, and the fruit production cycle is too long. Between 400-800 tons, it is only equivalent to 70-250 tons of eucommia gum annual output; therefore, the lack of total resources (leaves and fruits) of eucommia gum fundamentally limits the development of eucommia gum industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of method that heavy metal copper polluted soil is repaired, comprises the following steps:

[0025] A. Soil preparation: On the Yellow River beach, on sandy loam soil, open a ditch with a width of 0.5-0.6 meters, a depth of 0.7-0.8 meters, and a distance of 1-1.2 meters; apply farmyard manure in the ditch, and then backfill;

[0026] B. Density control: In order to facilitate mechanical harvesting, plant in wide and narrow rows, with a wide row spacing of 1 meter, a narrow row spacing of 0.5 meters, and a plant spacing of 0.25;

[0027] C. Planting and management: Afforestation in spring or winter is adopted, and the seedlings are selected from 1-year-old seedlings or grafted new varieties of Eucommia ulmoides; after planting, the stubble is flat, and the above-ground part is left 5 cm; water immediately; according to the local soil moisture, water as appropriate Water conservation; within 30 days after planting, wipe the buds, leave a main bud, and remove exces...

Embodiment 2

[0034] A kind of method that heavy metal copper polluted soil is repaired, comprises the following steps:

[0035] A. Soil preparation: On the Yellow River beach, on sandy loam soil, open a ditch with a width of 0.5-0.6 meters, a depth of 0.7-0.8 meters, and a distance of 1-1.2 meters; apply farmyard manure in the ditch, and then backfill;

[0036] B. Density control: In order to facilitate mechanical harvesting, plant in wide and narrow rows, with a wide row spacing of 1 meter and a narrow row spacing of 0.5 meters. According to the conditions of the planting land, the plant spacing is selected to be 0.3 meters;

[0037] C. Planting and management: Afforestation in spring or winter is adopted, and the seedlings are selected from 1-year-old seedlings or grafted new varieties of Eucommia ulmoides; after planting, the stubble is flat, and the above-ground part is left 5 cm; water immediately; according to the local soil moisture, water as appropriate Water conservation; within 3...

Embodiment 3

[0044] A kind of method that heavy metal copper polluted soil is repaired, comprises the following steps:

[0045] A. Soil preparation: In the shallow mountains and hills of Fujian, according to the terrain trend, the land is leveled along the contour line, and small-scale mechanical ditching or manual ditching is used. The width of the ditch is 0.5-0.6 meters, the depth is 0.7-0.8 meters, and the distance between the ditches is 1-1.2 meters. ; Apply farmyard manure in the ditch, and then backfill;

[0046] B. Density control: In order to facilitate mechanical harvesting, plant in wide and narrow rows, with a wide row spacing of 1 meter and a narrow row spacing of 0.5 meters. According to the conditions of the planting land, choose a plant spacing of 0.35

[0047] C. Planting and management: Afforestation in spring or winter is adopted, and the seedlings are selected from 1-year-old seedlings or grafted new varieties of Eucommia ulmoides; after planting, the stubble is flat, and...

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Abstract

The invention discloses a method for restoring soil contaminated by heavy metal copper. The method is characterized in that the low forest cultivation mode in which leaves and barks harvested in a short period are taken as gutta-percha raw materials in an extremely high planting density (with the plant spacing being 0.25-0.35 meter) is adopted, and the biomass and the gum yield are improved in a multiplied mode by adopting exogenous microbial treatment; meanwhile, in order to prevent the influence of heavy metals on the growth of eucommia ulmoides in the early growth stage of the eucommia ulmoides, soil backfilling is firstly adopted, the copper in the soil is continuously absorbed along with the continuous growth of the eucommia ulmoides, and the copper content in the soil is reduced; thephotosynthetic bacteria are added in the planting process, so that the production speed is remarkably increased, and after harvesting, the eucommia ulmoides leaves and the eucommia ulmoides barks areused for extracting the gutta-percha; and the eucommia ulmoides dry wood is used for making paper and composite plates. The method is a rapid soil remediation method, and meanwhile, the economic value is taken into consideration.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for remediating soil polluted by heavy metal copper. Background technique [0002] Heavy metals refer to metals with a specific gravity greater than 5 (generally referring to metals with a density greater than 4.5 grams per cubic centimeter). There are about 45 species, generally belonging to transitional elements. Such as copper, lead, zinc, iron, cobalt, nickel, manganese, cadmium, mercury, tungsten, molybdenum, gold, silver, etc. Although heavy metals such as manganese, copper, and zinc are trace elements needed for life activities, most heavy metals such as mercury, lead, and cadmium are not necessary for life activities, and all heavy metals are toxic to the human body if they exceed a certain concentration. [0003] For example, the clinical manifestations of mercury poisoning are: general symptoms are headache, dizziness, fatigue, and fever. Symptoms o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 俞高强
Owner 昆山合纵生态科技有限公司
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