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Method for restoring Cu, Zn and Ni in domestic waste composts by Kochia scoparia

A technology of domestic waste and restoration method, which is applied to the restoration of Cu in domestic waste compost, the restoration of urban domestic waste compost, the restoration of Zn, and Ni, can solve the problems that the restoration method has not been reported in the literature, and achieves increased enrichment and good wealth. The effect of the set effect

Inactive Publication Date: 2011-02-02
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, regarding the selection of Kochia scoparia as the research object, by applying different concentrations of EDTA and (NH 4 ) 2 SO 4 , the research on the remediation method of Kochia to Cu, Zn and Ni in domestic waste composting has not been reported in the literature

Method used

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  • Method for restoring Cu, Zn and Ni in domestic waste composts by Kochia scoparia
  • Method for restoring Cu, Zn and Ni in domestic waste composts by Kochia scoparia
  • Method for restoring Cu, Zn and Ni in domestic waste composts by Kochia scoparia

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) On the 20cm thick domestic waste compost, build and plant Kochia Kochia to restore vegetation with a small amount of plow layer soil containing Kochia propagule;

[0018] (2) Preparation of eluent: 50mmol / L EDTA solution: 1g / L (NH 4 ) 2 SO 4 The weight to volume ratio of eluent is 1:0.01;

[0019] (3) Then the eluent is watered along the root of the selected Kochia scoparia plant respectively, and the speed of watering is 10ml / min, so as to ensure that the watered solution is concentrated on the root of the plant;

[0020] (4) After the Kochia scoparia grew to 120 cm, the sample plants were collected, put into an oven, and dried at 80°C until constant weight, and finally weighed to measure the content changes of Cu, Zn, and Ni in domestic waste compost. See embodiment 3 for details.

Embodiment 2

[0022] (1) On the 50cm thick domestic garbage compost, build and plant Kochia Kochia to restore vegetation with a small amount of plow layer soil containing Kochia propagule;

[0023] (2) Preparation of eluent: 25mmol / L-50mmol / L EDTA solution: 1g / L (NH 4 ) 2 SO 4 The weight to volume ratio of the eluent is 1:0.03;

[0024] (3) Then the rinse solution is watered respectively along the root of the selected Kochia scoparia plant, and the speed of watering is 50ml / min, so as to ensure that the watered solution is concentrated on the root of the plant;

Embodiment 3

[0027] (1) Experimental materials

[0028] The garbage compost comes from Xiaodian Garbage Treatment Plant. The thickness of the compost substrate is 20cm. Dominant species. 15 Kochia plants of similar height and size were selected as experimental objects.

[0029] (2) Experimental method

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Abstract

The invention discloses a method for restoring Cu, Zn and Ni in domestic waste composts by a plant-Kochia scoparia, comprising the following steps: (1) sowing the Kochia scoparia based on 20-40g / square meter on the domestic waste composts with thickness of 20-50cm; (2) preparing leacheate: the weight-volume ratio of EDTA solution of 25mmol / L-50mmol / L to (NH4)2SO4 of 1g / L is 1:0.01-0.03; (3) irrigating the leacheate along the roots of the selected Kochia scoparia plants at the speed of 10-50ml / min, so as to ensure the irrigated solution is concentrated in the roots of the plants; (4) observingthe growth states of the plants, collecting sample plants after 20 days, placing the sample plants in an oven to be dried to the constant weight at the temperature of 80 DEG C, finally weighing the plants and measuring the contents of Cr, Pb and Cd in the domestic waste composts, thus achieving the effect of restoring the composts. In the method, by applying the EDTA and (NH4)2SO4 of different concentrations, the effect of the Kochia scoparia on restoring the heavy metals in the composts is researched, thus providing a basis for restoration of the heavy metals in the waste composts and safe and effective use of the heavy metals.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a repair method for composting municipal domestic garbage. More specifically, it is the repair method of Kochia to Cu, Zn and Ni in domestic waste composting. Background technique [0002] In cities, a large amount of domestic waste is produced every year. The general treatment methods for these wastes are mainly landfill and incineration. But such treatment is not only costly, but also causes secondary pollution to the environment. Therefore, in recent years, there have been composting methods for municipal waste in some cities. Composting is currently one of the most widely used and effective methods for dealing with municipal solid waste and sludge. Both at home and abroad have proposed that waste treatment should take the road of resource utilization. Garbage composting has been widely used in many countries and regions, especially in economically underdeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 赵树兰多立安冯琳
Owner TIANJIN NORMAL UNIVERSITY