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Method for enhanced remediation of copper contaminated soil by using iris in combination with cutting measure

A copper pollution, iris technology, applied in the field of phytoremediation of polluted environments

Inactive Publication Date: 2013-03-27
INST OF BOTANY JIANGSU PROVINCE & CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to effectively control soil copper pollution, traditional physical and chemical methods such as guest soil method, soil replacement method, electrochemical method, leaching method, adsorption method, etc. have achieved certain results as emergency response measures, but they will inevitably damage the soil structure. Causes secondary pollution, and has disadvantages such as large amount of engineering, high cost, short effective time, etc., which is limited in practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Take the example of remediation of contaminated soil at Jiuhuashan Copper Mine in Tangshan, Nanjing:

[0011] The experimental area is located in the Jiuhuashan copper mining area in the northeast of Tangshan Town, Jiangning District, Nanjing City (31°4'~32°7' north latitude, 118°22'~119°14' east longitude), which belongs to the north subtropical humid climate, and the soil Mainly yellow-brown soil. The mine is mainly copper ore, accompanied by polymetallic intermediate deposits of iron, zinc, sulfur and other elements. Since the mine was established in 1972, the mine has produced a large amount of waste water and waste residue during the production process for many years, posing a great threat to the surrounding ecological environment. Basic physical and chemical properties of the soil: pH7.4, total nitrogen content 0.01%, total potassium content 75.6μg·g -1 , total phosphorus content 3.8μg·g -1 , organic matter content 0.63%, Cu content 597.87μg·g -1 . The soil i...

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Abstract

The invention provides a method for enhanced remediation of copper contaminated soil by using iris in combination with a cutting measure, belonging to the technical field of phytoremediation in polluted environments. The invention particularly relates to a method for the accelerated remediation of copper contaminated soil by using yellow flag of iris in combination with the cutting measure. The method comprises the following steps of: planting the yellow flag on the copper contaminated soil after the overground parts of the yellow flag sprout in spring, harvesting the overground parts of the plants three times after planting survival, wherein the plants do not need to be managed after last harvesting in September, and root systems live through the winter naturally, and repeating the process after the overground parts of the plants sprout at the same time next year. According to the method, the biomass of the overground parts of the yellow flag of iris can be obviously increased through multiple cutting so that the copper accumulation of the overground parts of the yellow flag is increased by 31.2%, and the total removal rate of the copper in the soil reaches 48.9%. The method has the advantages of being simple and convenient to operate, capable of obviously increasing the growth speed of the yellow flag, increasing the extraction amount of the overground parts of the yellow flag on the copper and accelerating the process of remedying the copper contaminated soil by using the yellow flag of iris.

Description

technical field [0001] The invention relates to a method for intensively repairing copper-contaminated soil by using plants of the genus Iris combined with cutting measures, and belongs to the technical field of phytoremediation of polluted environments. Background technique [0002] In recent years, with the continuous intensification of industrialization, the increasingly serious heavy metal pollution has become a major environmental issue of global concern. Copper is an essential nutrient element for organisms. A moderate amount of copper is beneficial to humans, animals and plants, but excessive copper is harmful to the growth and development of organisms. The tailings and ores produced during the development of copper mines not only occupy a large amount of land, but also cause serious damage to the accumulation land and its surrounding environment. In addition, with the rapid development of industrial and agricultural production, the use of copper has become more and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 原海燕黄苏珍孙雨亮
Owner INST OF BOTANY JIANGSU PROVINCE & CHINESE ACADEMY OF SCI
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