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Method for converting heavy metal-enriched plant into miscellaneous fertilizer containing biological carbon special for mine vegetation recovery

A technology of vegetation restoration and heavy metals, applied in the field of environmental pollution control, can solve the problems of long period of soil heavy metals, pollution of degraded mine areas, and large amount of pollutants, so as to promote plant growth and soil microbial reproduction, and facilitate the extraction of materials. The effect of promoting plant growth

Inactive Publication Date: 2013-05-29
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mine degraded areas are seriously polluted, the total amount of pollutants is large, and the distribution is deep. It takes a long period to purify soil heavy metals with plant extraction and restoration technology, which is difficult to implement in practice.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] From August 2007 to October 2009, experiments were carried out in the Xiangtan manganese mining area.

[0029] (1) In August 2007, the straw, bamboo branches and bamboo poles were collected, the bamboo poles were cut into 1m long bamboo tubes, and the straw, bamboo branches and bamboo tubes were dried in the sun.

[0030] (2) Select the land with weeds around the uranium tailings pond, shovel and dig the weeds and soil together to make a blocky turf with soil and dry it in the sun.

[0031] (3) Collect the heavy metal-enriching plant Pokeweed ( Phytolacca americana ), dried.

[0032] (4) Lay straw and bamboo branches on a small piece of land in the reservoir area, lay bamboo tubes on the straw and bamboo branches, and cover pokeweed on the bamboo tubes to form a firewood pile. The firewood pile is covered with soil turf, and the bottom of the firewood pile is exposed. Light the pyre from the bottom and burn slowly. After the fire is extinguished, collect the burnt soi...

Embodiment 2

[0036] From September 2008 to October 2010, experiments were carried out in the Xiangtan manganese mining area.

[0037] (1) In September 2008, straw, bamboo branches and bamboo poles were collected, the bamboo poles were cut into 1m long bamboo tubes, and the straw, bamboo branches and bamboo tubes were dried in the sun.

[0038] (2) Select the land with weeds in the surrounding area of ​​the manganese mine, shovel and dig the weeds and soil together to make a blocky turf with soil and dry it in the sun.

[0039] (3) Collect the heavy metal-enriching plant P. pinnata ( Bidens maximowicziana ), dried.

[0040] (4) Pave straw and bamboo branches on a small piece of ground in the manganese mining area, lay bamboo tubes on the straw and bamboo branches, and cover the bamboo tubes with P. If exposed, light the pyre from the bottom and burn slowly. After the fire is extinguished, collect the burned soil and biochar, sieve it, and make soil miscellaneous fertilizer containing bio...

Embodiment 3

[0044] From September 2008 to October 2010, experiments were carried out in the Xiangtan manganese mining area.

[0045] (1) In September 2008, the straw, bamboo branches and bamboo poles were collected, the bamboo poles were cut into 1m long bamboo tubes, and the straw, bamboo branches and bamboo tubes were dried in the sun.

[0046] (2) Select the land with weeds in the surrounding area of ​​the manganese mine, shovel and dig the weeds and soil together to make a blocky turf with soil and dry it in the sun.

[0047] (3) Collect the heavy metal-enriching plant Solanum solanum ( Solanum nigrum ), dried.

[0048](4) Lay straw and bamboo branches on a small piece of land in the manganese mining area, lay bamboo tubes on the straw and bamboo branches, and cover the bamboo tubes with black nightshade to form a firewood pile. The lower part ignites the pyre and burns slowly. After the fire is extinguished, the burned soil and biochar are collected and sieved to make soil miscell...

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Abstract

The invention relates to a method for converting a heavy metal-enriched plant into a miscellaneous fertilizer containing biological carbon special for mine vegetation recovery, which comprises the following steps of: (1) collecting and drying a straw; (2) collecting a bamboo branch and a bamboo pole, cutting the bamboo pole into a bamboo tube and drying the bamboo branch and the bamboo tube; (3) collecting and drying the heavy metal-enriched plant growing in a mine pollution area; (4) selecting soil on which weeds are grown, shoveling and digging the weeds together with the soil, preparing a blocky turf with soil, and drying; and (5) selecting a patch, bedding the straw and the bamboo branch, covering the bamboo tube on the straw and the bamboo branch, covering the heavy metal-enriched plant on the bamboo tube to pile into a woodpile, covering the turf with the soil on the woodpile, exposing the lower part of the woodpile, igniting the woodpile from the lower part, slowly burning, collecting burned soil and biological carbon after the extinguishment of fire and sieving to prepare the miscellaneous fertilizer containing the biological carbon. The method has the beneficial effects that the heavy metal-enriched plant growing in the mine area is utilized for burning the miscellaneous fertilizer, and the miscellaneous fertilizer is then utilized for improving a mine pollution matrix and promoting the growth of the plant, so that the safe recycling of a phytoremediation harvested product is realized.

Description

technical field [0001] The invention relates to the field of environmental pollution control, in particular to a method for transforming heavy metal-enriched plants into biochar-containing soil miscellaneous fertilizers specially used for mine vegetation restoration. Background technique [0002] Traditional remediation technologies for heavy metal pollution control mainly include engineering technology, physical technology, chemical technology, and physical and chemical technology. Traditional restoration techniques have limitations such as high cost, damage to soil structure, damage to fertility, and secondary pollution. Phytoremediation of heavy metal pollution is the use of plants to cut, purify heavy metals in the soil or reduce the toxicity and mobility of heavy metals. Phytoremediation technology has the advantages of low cost, good effect, easy operation and suitable for large-scale restoration, and can produce good ecological and social benefits. During the proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
CPCY02P20/134Y02P20/133
Inventor 向言词冯涛刘阿梅严明理曾荣今李会东朱佳文彭秀花
Owner HUNAN UNIV OF SCI & TECH
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