Application of koelreuteria paniculata/euonymus japonicus allocation combination for fixing heavy metal in soil

A technology of heavy metals and eucalyptus, applied in the field of phytoremediation of contaminated soil, to achieve the effect of passivating heavy metals, protecting surface soil, and reducing environmental risks

Active Publication Date: 2017-07-14
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem of repairing the heavy metal polluted areas at present, the present invention makes full use of the ecological space by effectively configuring and combining the eucalyptus and Phnom Penh Boxwood, strengthens the efficiency of plant fixation and repair, and applies it to the repair of heavy metal polluted soil. The present invention is realized in the following way:

Method used

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  • Application of koelreuteria paniculata/euonymus japonicus allocation combination for fixing heavy metal in soil
  • Application of koelreuteria paniculata/euonymus japonicus allocation combination for fixing heavy metal in soil
  • Application of koelreuteria paniculata/euonymus japonicus allocation combination for fixing heavy metal in soil

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The construction site of this example is a park in Changshu City, Jiangsu Province. The soil is dredging sludge at the bottom of the lake. The heavy metal pollution in the soil is serious. The Cd concentration is 0.93mg / kg. The heavy metal content seriously exceeds the standard, which seriously threatens the local ecological environment and human health.

[0026] Construction method:

[0027] (1) Plow the contaminated soil, mix it with a rotary tiller, and rake it. Make good drainage measures around.

[0028] (2) In March, common and fixed greening trees were selected: weeping willow, ginkgo, camphor, magnolia, eucalyptus, metasequoia, and poplar, and planted in heavy metal-polluted soil at 2m×3m intervals, to Strong resistance to screening heavy metals; among them, weeping willows are planted in stems, and ginkgo, camphor, magnolia, eucalyptus, metasequoia, and poplar are planted with roots.

[0029] (3) Water the seedlings after they are planted, and conduct regular...

Embodiment 2

[0033] The soil used in the present embodiment is the same as that of embodiment 1, and land arrangement and sub-bed processing are the same as embodiment 1, and the concrete construction method is as follows:

[0034] (1) In December and January in winter, use a tiller to plow the soil 30cm deep, and dry the field for more than one month. In February, use a rotary tiller to mix and harrow the soil.

[0035] (2) Treat the beds according to the field trend, each bed is 3m wide, and open a ditch between the beds as a drainage ditch. According to the actual situation, you can also spray herbicides before planting.

[0036] (3) Select annual shrub seedlings: Photinia fragrans, Pittosporum, Roropetalum safflower, Buxus Phnom Penh, and Ligustrum aureus seedlings are planted in polluted soil with roots, and the planting density is 20-25 / m 2 .

[0037] (4) Water the seedlings after planting, and manage them in the normal field.

[0038] (5) The green shrub plant samples will be coll...

Embodiment 3

[0041] The soil used in the present embodiment is the same as that of Example 1, and land preparation and sub-bed processing are the same as Example 1. The preferred arbor plant eucalyptus and shrub plant Euonymus chrysanthemum in Examples 1 and 2 were combined in an effective scientific configuration to study the plant fixation and restoration effect of the greening plant configuration combination.

[0042] The construction method is as follows:

[0043] (1) In March, select eucalyptus trees with a diameter of 2-3cm, remove the top twigs, and plant them in polluted soil with a spacing of 2m×3m; plant the annual Phnom Penh Boxwood seedlings directly around Phnom Penh Boxwood at a planting density of 20-25 / m 2 .

[0044] (2) After the greening plants are planted, water them on the same day, keep the soil moist within one week after planting, and then manage them normally in the field.

[0045](3) The green plants were sampled and analyzed in the fall of the year after plant...

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Abstract

Disclosed is application of koelreuteria paniculata/euonymus japonicus allocation combination for fixing heavy metal in soil. The remediation effect, the landscape benefit and the economic benefit are taken into overall consideration, koelreuteria paniculata/euonymus japonicus trees with high tolerance to different kinds of heavy metal are planted in soil contaminated by heavy metal in an allocation combination mode, and therefore heavy metal in soil is passivated and fixed to the rhizosphere, the bio-availability of heavy metal is reduced, and the environmental risk is reduced. Plants existing after remediation are sold in the mode of serving as nursery stocks, and therefore the economic benefit is generated. According to the application, the generated green plant combination fixing remediation technology is easy to operate, production and remediation are achieved at the same time, and the quite high popularization and application value is achieved.

Description

technical field [0001] The invention relates to the field of phytoremediation for remediation of polluted soil, in particular to the application of a combination of eucalyptus and poplar phnomellitanus in fixing heavy metals in soil. Background technique [0002] In the past few decades, with the development of mining and smelting industries in my country, the lack of environmental protection awareness, and the lack of environmental protection laws, heavy metal pollution in soil in some areas has been serious. According to the "National Soil Pollution Survey Bulletin", heavy metal pollution in industrial wasteland, mining areas, road sides and other soils is serious, and the survey site exceeds the standard rate by more than 20%, and the soil environment of industrial and mining wasteland is serious. These heavily polluted soils are no longer suitable for farmland or development. How to safely utilize heavy metal-polluted soils has become an urgent problem to be solved. [...

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 郭红岩王国兵张庆泉王保松艾弗逊杜文超何旭东尹颖
Owner NANJING UNIV
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