Ecological landscape construction method of stopping and controlling non-point source pollution of multi-metal tailings

Abstract

The invention discloses an ecological landscape construction method of stopping and controlling non-point source pollution of multi-metal tailings. Firstly, a barrier layer is arranged on the periphery of a tailing to prevent heavy metals in the tailing from migrating outwardly. Then a heavy metal stabilizing agent is applied to the upper layer part of the tailing and mixed stably to form a heavy metal stabilization layer. The heavy metal stabilizing agent is obtained through modification of Orychophragmus violaceus by means of acetic acid / acetic anhydride solution. The heavy metal stabilization layer is covered with a soil layer mixed with a soil amendment. Plants with high resistance to heavy metals are planted in the soil layer. The heavy metal stabilizing agent uses cheap raw materials and is simple in preparation technology. Through thiol modification of the Orychophragmus violaceus, the Orychophragmus violaceus has good heavy metal adsorption performance and can adsorb and stabilize the heavy metals in the tailing. The effect is good and the price is low. Besides, the method can establish a stable, safe and self-sustaining vegetation community in the tailing and effectively control migration and diffusion of heavy metal pollutants.

Description

technical field

[0001] The invention relates to the technical field of environmental treatment, in particular to a method for constructing an ecological landscape for preventing and controlling non-point source pollution of multiple metal tailings reservoirs. Background technique

[0002] Non-ferrous metals have been mined since the Western Han Dynasty, with a history of more than 2,000 years. Mining has long been a pillar industry in China. The mining industry has brought about economic development. However, as a kind of mining wasteland, the tailings wasteland generated after mining not only occupies a large amount of land, but also destroys a large area of ​​vegetation and landscape, resulting in the disappearance of a large number of species and biodiversity. The ecological system has been degraded and the local ecological environment has been seriously damaged. In addition, tailings contain a large amount of heavy metals (lead, chromium, cadmium, arsenic, mercury, etc....

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