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Method for restoring cadmium-polluted soil by using herbaceous plants

A technology for cadmium-contaminated soil and herbaceous plants, applied in the field of repairing cadmium-contaminated soil with herbal plants, can solve problems such as low efficiency of soil technology, achieve important market value and social value, high restoration efficiency, and facilitate field management

Inactive Publication Date: 2018-05-08
XINXIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing phytoremediation technology for heavy metal cadmium-contaminated soil is inefficient and needs to be improved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method of utilizing herbal plants to restore cadmium-contaminated soil, the steps are as follows:

[0025] 1) Prepare a restoration agent, which consists of the following raw materials in parts by weight: 18 parts of wheat straw, 30 parts of corn straw, 16 parts of soda lime, 35 parts of sawdust, 25 parts of poultry manure, 10 parts of bean cake, modified 6 parts of sepiolite powder;

[0026] The preparation method of the restoration agent is as follows: take wheat straw and corn straw, grind them to a particle size of 1 cm, mix them evenly, then put them into a fixed bed pyrolysis furnace, and process them at 300°C for 1 hour to obtain the first mixture; After the manure and bean cake are mixed evenly, they are composted for 15 days. After the composting is completed, they are aired to obtain the second mixture; the first mixture and the second mixture are combined, and soda lime, sawdust and modified sepiolite powder are added, and stirred After mixing evenly, you ...

Embodiment 2

[0035] A method of utilizing herbal plants to restore cadmium-contaminated soil, the steps are as follows:

[0036] 1) Prepare a restoration agent, which consists of the following raw materials in parts by weight: 19 parts of wheat straw, 31 parts of corn straw, 20 parts of soda lime, 36 parts of sawdust, 25 parts of poultry manure, 15 parts of bean cake, modified 7 parts of meerschaum powder;

[0037] The preparation method of the restoration agent is as follows: take wheat stalks and corn stalks, grind them to a particle size of 1 cm, mix them uniformly, then put them into a fixed bed pyrolysis furnace, and process them at 300° C. for 1.5 hours to obtain the first mixture; Livestock manure and bean cake are mixed evenly and composted for 16 days. After the composting is completed, they are air-dried to obtain the second mixture; the first mixture and the second mixture are combined, and then soda lime, sawdust and modified sepiolite powder are added. After stirring and mixi...

Embodiment 3

[0046] A method of utilizing herbal plants to restore cadmium-contaminated soil, the steps are as follows:

[0047] 1) Prepare a restoration agent, which consists of the following raw materials in parts by weight: 20 parts of wheat straw, 32 parts of corn straw, 18 parts of soda lime, 37 parts of sawdust, 28 parts of poultry manure, 13 parts of bean cake, modified 8 parts of meerschaum powder;

[0048] The preparation method of the restoration agent is as follows: take wheat straw and corn straw, grind them to a particle size of 1 cm, mix them uniformly, put them into a fixed bed pyrolysis furnace, and process them at 310°C for 1.5 hours to obtain the first mixture; Livestock manure and bean cake are mixed evenly and composted for 17 days. After the composting is completed, they are air-dried to obtain the second mixture; the first mixture and the second mixture are combined, and then soda lime, sawdust and modified sepiolite powder are added. After stirring and mixing evenly...

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Abstract

The invention discloses a method for restoring cadmium-polluted soil by using herbaceous plants. The method comprises the following steps that a repairing agent is prepared; an accelerant is prepared;the repairing agent is sown on the to-be-restored cadmium-polluted soil, and then is turned over, crushed and aired; the accelerant is sown on the to-be-restored cadmium-polluted soil, and then is turned over and aired; the Lamiaceae herbaceous plants and the Apocynaceae herbaceous plants are planted on the aired cadmium-polluted soil at intervals, irrigation is carried out periodically, and after the Lamiaceae herbaceous plants and the Apocynaceae herbaceous plants are mature, harvesting is carried out; and the steps are repeated. According to the method, the repairing effect on the cadmium-polluted soil is good, the repairing efficiency is high, secondary pollution is prevented, the field management technology requirements are not high, field management is facilitated, meanwhile, the effect of beautifying the environment can be achieved while the cadmium-polluted soil is repaired, and the method is convenient for large-scale popularization and application, and has important market values and social values.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal-contaminated soil, in particular to a method for remediating cadmium-contaminated soil by using herbal plants. Background technique [0002] Since the industrial revolution, my country's economy has been in a stage of rapid development, and it has also brought a lot of environmental problems. The discharge of industrial solid waste, irrigation of polluted wastewater, unreasonable application of pesticides and fertilizers, and atmospheric deposition will cause a large number of environmental problems. Heavy metals enter the soil, seriously threatening the soil ecological environment and human health. According to relevant statistical reports, the soil area polluted by heavy metals in my country is extensive, the pollution concentration is high, and the soil has been severely damaged. Among them, the cultivated land is the most seriously polluted soil type by heavy metals. 1 / 5 of t...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 张家洋李振华徐飞庄静静徐小博崔婧
Owner XINXIANG UNIV
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