Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for applying paddy rice in repairing soil contaminated by heavy metal cadmium

A technology for cadmium-contaminated soil and heavy metals, applied in the field of remediation of heavy metal cadmium-contaminated soil, can solve the problems of not being widely used, heavy metal removal, restriction, etc., and achieve the effect of low cost, remediation of cadmium pollution, and large capacitance

Inactive Publication Date: 2012-07-11
SICHUAN AGRI UNIV
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is limited to the characteristics of the materials used for repair and cannot be widely used
Therefore, hyperaccumulator plants are the most important factor affecting phytoremediation, and hyperaccumulator plants have their own shortcomings, which are greatly limited in practical applications.
In summary, both the traditional remediation method and the phytoremediation technology of heavy metal-contaminated soil have certain limitations. At present, there is no effective method that can fundamentally remove or reduce heavy metals from soil-contaminated environments to acceptable concentrations. Level

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The invention will be further described below in combination with specific embodiments.

[0015] A method for using rice to restore heavy metal cadmium-contaminated soil is realized according to the following steps: 1. Plant rice seedlings in cadmium-contaminated soil; 2. Manage in a conventional field; 3. Harvest whole plant rice; Combustion and ashing; 5. Use the ashing of rice to extract heavy metals; this rice has the characteristics of high accumulation of cadmium.

[0016] The experiment was carried out in the teaching and research park of Sichuan Agricultural University. With reference to the mass fraction background value of cadmium in my country's main agricultural soils, the average value is 0.12mg / kg between 0.01-1.34mg / kg, and the soil for testing is the control soil (soil A: the total amount of cadmium is 0.37mg / kg, and the effective amount is 0.083 mg / kg) and soils with two different levels of cadmium pollution (soil B: the total amount of cadmium is 2.33m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for repairing soil contaminated by the heavy metal cadmium and specifically to a method for applying paddy rice with high accumulation of cadmium in repairing soil contaminated by the heavy metal cadmium. The method comprises the following steps: 1, planting paddy rice seedlings in soil contaminated by cadmium; 2, managing the seedlings as managing a conventional big field; 3, harvesting the whole plant of the paddy rice; 4, burning and ashing the harvested paddy rice; and 5, extracting the heavy metal from an ashing product of the paddy rice. According to the invention, since the paddy rice with high accumulation of cadmium has accumulation characteristic to cadmium, the paddy rice is planted in soil contaminated by cadmium to absorb and accumulate cadmium and to transfer most cadmium to the aboveground part of the paddy rice, thereby achieving the purpose of repairing soil.

Description

technical field [0001] The invention relates to a method for repairing soil polluted by heavy metal cadmium, in particular to a method for repairing soil polluted by heavy metal cadmium by using rice with high accumulation of cadmium. Background technique [0002] Cadmium (Cd) is a non-essential element for the growth and development of animals and plants. It is listed as the "first of the five poisons" because of its high mobility, high toxicity, and the largest polluted area. Cadmium will not only cause various physiological toxic effects on plants, but more seriously, the absorption and enrichment of cadmium by plants will cause potential harm to human health through the food chain. Therefore, reducing the high content of cadmium in soil to an acceptable concentration level is of great significance for controlling soil cadmium pollution. Traditional remediation methods for heavy metal-contaminated soil include physical methods (leaching method, guest soil method, adsorpt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B09C1/00
Inventor 郑子成李廷轩余海英张锡洲王永东郑陶张洪江
Owner SICHUAN AGRI UNIV