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

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 ...