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Method for repairing urban house refuse compost heavy-metal composite pollution by synergistic lawn plant

A technology of municipal solid waste and complex pollution, which is applied in the field of synergistic turf plants to remediate heavy metal complex pollution of urban solid waste composting, which can solve the problems of low biomass, poor repair effect and slow growth of matrix due to heavy metal complex pollution, and achieve low cost , strong regenerative performance, and the effect of enhancing the enrichment ability

Inactive Publication Date: 2005-12-21
TIANJIN NORMAL UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be pointed out that there are also big problems in the restoration process of heavy metals in the matrix of hyperaccumulator plants, such as the lack of biomass in the aboveground parts of hyperaccumulator plants, their slow growth, and the specific and selective absorption of heavy metals. Poor remediation effect on heavy metal compound polluted matrix

Method used

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  • Method for repairing urban house refuse compost heavy-metal composite pollution by synergistic lawn plant
  • Method for repairing urban house refuse compost heavy-metal composite pollution by synergistic lawn plant
  • Method for repairing urban house refuse compost heavy-metal composite pollution by synergistic lawn plant

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Experimental program
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Effect test

Embodiment 1

[0031] Sieve the composted waste from Tianjin Xiaodian Waste Treatment Plant (1 cm × 1 cm sieve), put it into an oven, and dry it to constant weight at 80°C to prepare for lawn grass Culture substrate. The content of heavy metals such as Cr, Mn, Ni, Cu, Zn, Cd, Pb, etc. in the background of compost waste was analyzed by ICP-AES method (results are shown in Table 1). Disodium ethylenediaminetetraacetic acid (EDTA) was used as chelating agent for turfgrass to extract heavy metals from compost waste matrix. The turfgrass species are tall fescue and perennial ryegrass, which are widely used in Northeast, Northwest and North China.

[0032] The dosage of lawn grass cultivation compost waste substrate is 30g, and the cultivation container is a petri dish with a diameter of 10cm. The sowing rate of two kinds of lawn grass seeds is 100 grains. The treatment levels of EDTA dosage were: 0, 10.0, 20.0, 30.0mmol / kg, and were applied to the matrix 26 days after sowing. The experiment w...

Embodiment 2

[0038] Embodiment 2 (concrete method is the same as embodiment 1, but the time of EDTA distribution is different):

[0039] The compost waste collected from Tianjin Xiaodian Waste Treatment Plant was screened and sorted, put into an oven, and dried to constant weight at 80°C to prepare as a turfgrass culture substrate. The contents of seven heavy metals including Cr, Mn, Ni, Cu, Zn, Cd and Pb in the background of compost waste were analyzed by ICP-AES. Disodium ethylenediaminetetraacetic acid (EDTA) was used as chelating agent for turfgrass to extract heavy metals from compost waste matrix. The turfgrass species are tall fescue and perennial ryegrass commonly used in northern my country.

[0040] For turfgrass cultivation, the amount of compost waste matrix is ​​30g, and the cultivation container is a petri dish with a diameter of 10cm. The sowing rate of two kinds of lawn grass seeds is 100 grains. The EDTA doses of the two lawn grasses are: O, 10.0, 20.0, 30.0 mmol / kg. E...

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Abstract

The invention relates to the method of a kind of using synergizing lawn plant to restore the heavy metal compound pollution in city life waste compost. In the period from seeding to mowing of grasses on lawn, fertilize EDTA into the waste compost base substance as per 5 - 30 mmol / kg; through fertilize EDTA, increase the extracting effect of lawn grasses to heavy metal in city life waste compost base substance, to make the effect of lawn glasses corresponding to the effect of heavy metal super-enriching plant. The application of the invention can not only rebuild waste compost industry, and realize the effective resource use of waste compost, but also provide scientific basis for complexing restoration of lawn grasses to heavy metal pollution area.

Description

Technical field: [0001] The invention relates to the technical field of environmental pollution restoration engineering, in particular to a method for synergistic lawn plants to repair urban domestic garbage composting heavy metal compound pollution. By adding EDTA, the extraction effect of turfgrass on heavy metals in municipal solid waste composting matrix is ​​increased, so that the effect of turfgrass is equivalent to that of heavy metal hyperaccumulator plants. The application of the invention can not only revitalize the garbage composting industry, but also provide a scientific basis for complexation repair of lawn grass in heavy metal polluted areas. technical background: [0002] The pollution caused by municipal solid waste (hereinafter referred to as garbage) has become a serious environmental problem worldwide, and the utilization of waste resources has attracted widespread attention from the international community. Over the years, my country's garbage stockpile...

Claims

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Application Information

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IPC IPC(8): C05F9/04
CPCY02A40/20
Inventor 多立安赵树兰
Owner TIANJIN NORMAL UNIVERSITY
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