Terrestrial plant collocation method for river entering heavy metal ecological reduction

Abstract

The invention provides a terrestrial plant collocation method for river entering heavy metal ecological reduction and belongs to the field of mining area heavy metal ecological reduction. According to the method, arbors, shrubs and herbaceous plants are planted on coastal land according to the optimal proportion, the arbors include camphor trees, the shrubs include oleander and nandina domestica thumb, the herbaceous plants include paspalum orbiculare, mat grass, large-leaf gynostemma pentaphylla and osmunda japonica thumb, and thereby, the problem of heavy metal pollution of mining area surrounding soil due to waste rocks, waste residues and waste water that are produced during ore extraction and smelting can be solved. By means of the terrestrial plant collocation method for river entering heavy metal ecological reduction, heavy metal content of coastal soil can be reduced, effective ecological reduction function on heavy metal migration caused by surface runoff can be achieved, meanwhile, five kinds of heavy metals such as Cd, Cr, Pb, As and V can be enriched, various evergreen plants exist, certain ecological reduction effect is guaranteed in each season, obvious competitive relation among plants is absent, and collocation is achieved according to the optimal proportion so that the ecological reduction effect on the heavy metals can be improved.

Description

technical field [0001] The invention relates to the field of ecological reduction of heavy metals in mining areas, in particular a terrestrial plant collocation method for ecological reduction of heavy metals in rivers, which aims to reduce the migration of heavy metals caused by surface runoff and provide technical support for the ecological reduction of heavy metals in surface runoff in vanadium mining areas . Background technique [0002] Vanadium is an important alloying element, which is widely used in metallurgy, aviation, chemical industry and other fields in the form of ferrovanadium, vanadium compounds and metal vanadium. The global demand for vanadium is increasing day by day, but at the same time, the harm caused by the development of vanadium mines to the environment is becoming increasingly prominent. [0003] At present, during the mining process of stone coal vanadium ore, generally 0.2-0.3 tons of waste rock will be produced for every 1 ton of ore mined. The...

AI Technical Summary

Problems solved by technology

Erosion control in open pits is very difficult. A large amount of eroded rock and soil enters rivers with surface runoff in mountainous areas, thereby affecting the water quality of rivers.

There are a lot of heavy metals in the tailings, waste residue and wastewater produced during the smelting of vanadium ore, which are all potential safety hazards affecting the water quality of rivers

[0004] At present, the plant matching mode of phytoremediation and ecological reduction technology is often seasonally bound, the plant species are single, and only for one or two heavy metals, but the production of factories and mines is often accompanied by multiple heavy metal pollution

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