Phytoremediation method for heavy metal Cd contaminated soil

Abstract

The invention discloses a phytoremediation method for heavy metal Cd contaminated soil. According to the technical scheme, the method comprises the following steps: (1) readjustment of field plots andpartitioning: after tilling the land, removing straws and weeds, watering and leveling; (2) planting: transplanting economic plants capable of absorbing heavy metals into the readjusted plots; (3) adding repair materials: to kill soil bacteria, promote plant rooting and germination, and enhance the efficiency of absorbing Cd in soil by plants; (4) plant sample collection and analysis test: samplecollection and data analysis test on plants after one year of growth; (5) calculating enrichment coefficients of heavy metal Cd enriched by different treatment plants, yield (dry weight) of differenttreatment plants and total amount of Cd adsorbed by one hectare of plants, and investigating the purchase price per acre of plants to calculate the output value per acre. The phytoremediation methodintroduces the concept of circular economy while focusing on the test of the repair technology, thereby improving the repair efficiency and creating economic and social values.

Description

technical field [0001] The invention relates to a phytoremediation method for soil polluted by heavy metal Cd. Background technique [0002] Phytoremediation has recently become the most acceptable, economical, eco-friendly, and aesthetically pleasing heavy metal removal technology in polluted land. As a low-cost and environmentally friendly technology, it is a new type of remediation technology that is more feasible and effective than traditional soil remediation technologies. . However, domestic engineering projects for remediation of heavy metal pollution in soil have little investment, and field application of phytoremediation is still limited because of its high cost, low efficiency, and long time-consuming. The super-accumulative plants used in the world have small plant biomass in the actual restoration process, and the super-accumulative roots are difficult to clean out from the soil. Therefore, although the super-accumulative plants have a strong ability to accumul...

AI Technical Summary

Problems solved by technology

However, domestic engineering projects for remediation of heavy metal pollution in soil have little investment, and field application of phytoremediation is still limited because of its high cost, low efficiency and long time-consuming

The super-accumulative plants used in the world have small plant biomass in the actual restoration process, and the super-accumulative roots are difficult to clean out from the soil. Therefore, although the super-accumulative plants have a strong ability to accumulate heavy metals, it is difficult to reflect them in practical applications. obvious advantage