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Method for treating soil or water cadmium pollution

A technology for cadmium pollution and water body, applied in the field of environmental pollution restoration, can solve the problems of low cost restoration efficiency, cadmium pollution of soil and water body, etc., and achieve the effect of improving soil degradation and productivity decline, large biomass and high restoration efficiency

Inactive Publication Date: 2010-05-26
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for controlling soil or water cadmium pollution with low cost, high repair efficiency, no secondary pollution, and no damage to the soil or water ecosystem for the current serious problem of cadmium pollution in soil and water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Soil Remediation

[0030] After harvesting the mature fruit of carambola, stack it for 3-5 days, after the pulp becomes soft and rotten, take out the seeds manually, then place them for 2-3 days, after the pectin attached to the seeds rots, rinse them with clean water, and Can be dried in the shade for later use.

[0031] Mix the shade-dried seeds and river sand and spread them on the seedbed, cover the sand with a thickness of 0.6-0.8 cm, water and cover with a layer of plastic film, keep the seedbed moist in the future, and pay attention to prevent mice and ants from eating the seeds, and grow seedlings in the greenhouse , air relative humidity 60-75%, temperature 25-30 ℃.

[0032] Cultivate the seedlings of 4 main carambola varieties (Taiwan, Malaysia, Thailand and Huadi) in the normal soil of the greenhouse; when the seedlings grow to 10-15 cm, they are transplanted into heavy metal polluted soil, and the cadmium content of the test soil is 60mg / kg, ap...

Embodiment 2

[0033] Example 2: Water restoration

[0034] After harvesting the mature fruit of carambola, stack it for 3-5 days, after the pulp becomes soft and rotten, take out the seeds manually, then place them for 2-3 days, after the pectin attached to the seeds rots, rinse them with clean water, and Can be dried in the shade for later use.

[0035]Mix the shade-dried seeds and river sand and spread them on the seedbed, cover the sand with a thickness of 0.6-0.8 cm, water and cover with a layer of plastic film, keep the seedbed moist in the future, and pay attention to prevent mice and ants from eating the seeds, and grow seedlings in the greenhouse , air relative humidity 60-75%, temperature 25-30 ℃. Cultivate the seedlings of four carambola varieties (Taiwan, Malaysia, Thailand and Huadi) mainly planted in South China in the normal soil of the greenhouse; when the seedlings grow to 10-15 cm, they are transplanted into floating beds with cadmium-contaminated water bodies, and the roo...

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PUM

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Abstract

The invention discloses a method for treating the cadmium pollution of soil or water body. The invention adopts a woody plant carambola (Averrhoa carambola L) which can highly gather the cadmium, andwhich can activate and absorb the cadmium in soil and water body. The cadmium can be successively extracted by successively cutting the part on ground till the cadmium content in the soil or the watermeet the environmental protection standard. The method provided in the invention has the advantages of low cost, high renovating efficiency and possible extensive promotion. Through adopting the method in the invention, no secondary pollution is caused. At the same time, the renovating process doses not destroy ecosystem of the soil or water body. Furthermore, the invention is beneficial for alleviating degradation and productivity reduction of the soil or water body caused by the cadmium pollution to the soil or the water body.

Description

technical field [0001] The invention relates to the field of environmental pollution restoration, in particular to a method for controlling cadmium pollution in soil or water. Background technique [0002] Cadmium (Cd) is one of the most toxic heavy metal elements in the environment to plants, animals and humans, and has strong teratogenic, carcinogenic and mutagenic properties. Cadmium in soil and water can easily enter the human body through the food chain and directly endanger human health; therefore, the treatment technology of cadmium-contaminated soil and water has always been a hot research topic that has attracted worldwide attention. [0003] my country is rich in cadmium (usually associated with lead-zinc ore) mineral resources. Due to the natural weathering of cadmium-rich ore bodies and the corresponding mining activities such as open-pit mining and smelting, as well as the extensive use of chemical fertilizers, pesticides and other chemical products; at present,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/10C02F3/32
Inventor 李金天束文圣廖斌蓝崇钰
Owner SUN YAT SEN UNIV
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