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Method for restoring heavy metal Cr from house refuse compost by mulberry

A technology of domestic waste and heavy metals, applied in gardening methods, botany equipment and methods, applications, etc.

Inactive Publication Date: 2012-08-15
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the research on the remediation of heavy metals by woody plants has been affirmed, there are few related systematic researches; but there is no report on the enrichment of heavy metals in mulberry compost

Method used

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  • Method for restoring heavy metal Cr from house refuse compost by mulberry
  • Method for restoring heavy metal Cr from house refuse compost by mulberry
  • Method for restoring heavy metal Cr from house refuse compost by mulberry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) On the experimental ground where the mulberry tree has grown for 4 years, the thickness of the tile is 40cm, and the compost is made firm and flat by suppression;

[0052] (2) Preparation of eluent: 50mmol / L EDTA: 1g / L (NH 4 ) 2 SO 4 The weight to volume ratio is 1:0.01 to prepare eluent;

[0053] (3) Water the above-mentioned eluents along the roots of the selected mulberry plants respectively, at a rate of 50ml / min, to ensure that the watered solution is concentrated in the roots of the plants, observe the growth of the plants, and collect sample plants after 20 days;

[0054] (4) Measure the height of each collected sample plant, then divide it into the above-ground part and the underground part, wrap them with labels, put them in an oven, and dry them at 80°C to constant weight, and finally crush the samples ;

[0055] (5) Accurately weigh three crushed samples of each section of each plant, each 0.2g, using HNO 3 Wet method and microwave digestion were us...

Embodiment 2

[0057] (1) On the experimental ground where the mulberry tree has grown for 4 years, lay the domestic waste compost with a thickness of 50cm, and make the compost firm and flat through suppression;

[0058] (2) Preparation of eluent: 100mmol / LEDTA; or 1g / L (NH 4 ) 2 SO 4 eluent;

[0059] (3) Water the above-mentioned eluent along the roots of the selected mulberry plants respectively, at a rate of 30ml / min, to ensure that the watered solution is concentrated in the roots of the plants, observe the growth of the plants, and collect sample plants after 20 days;

[0060] (4) Measure the height of each collected sample plant, then divide it into the above-ground part and the underground part, wrap them with labels, put them in an oven, and dry them at 80°C to constant weight, and finally crush the samples ;

[0061] (5) Accurately weigh three crushed samples of each section of each plant, each 0.2g, using HNO 3 Wet method and microwave digestion were used for digestion, and ...

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Abstract

The invention discloses a method for restoring heavy metal Cr from house refuse compost by mulberry. The house refuse compost with a flat thickness of 20-50cm is suppressed to become solid and flat to serve as the land for restoration work; mulberries are planted on the land for restoration work; the mulberries grow for four years and then used for restoring Cd from the house refuse compost.EDTA and (NH4) 2SO4 leacheate are irrigated along the root segments of the selected mulberry plants at an irrigation speed of 10-50ml / min to ensure that the irrigated solution is concentrated on the root segments of the plants; growth of the plants is observed, a sample plant is collected after 20 days; after aftertreatment is carried out, a TAS-990 atomic absorption spectrophotometer is used for measuring content of Cr in the mulberries.The method disclosed by the invention provides grounds for restoration of heavy metal in mulberry matrix and safe and effective utilization of house refuse compost.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a treatment and restoration method for composting urban domestic garbage. More specifically, it is a method of using mulberry to restore Cr in domestic waste compost. Background technique [0002] The process of collecting municipal solid waste into piles, storing it in heat preservation, fermenting, and using the biochemical action of microorganisms under artificial control conditions to degrade the organic matter in the waste into stable humus-like soil substances is called waste composting. This treatment process decomposes the perishable organic matter in the garbage and transforms it into an organic fertilizer rich in organic matter and nutrients such as nitrogen, phosphorus, and potassium, so that the garbage can realize a virtuous cycle from nature and back to nature, which is an economical and effective treatment and consumption An important way of urban w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G1/00A01G7/00C05F9/04
CPCY02A40/20
Inventor 赵树兰多立安
Owner TIANJIN NORMAL UNIVERSITY
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