The Method of Removing Heavy Metals in Lake Sediment by Using Submerged Plants

Abstract

The invention discloses a method for removing heavy metal from lake deposit by using benthophyte. Aiming at the defect that a lake deposit heavy metal physical chemical restoring method in the prior art is high in cost and prone to cause secondary pollution, provided is a method for in-situ restoration on lake deposit heavy metal by using benthophyte. The method comprises: 1) detecting the contentof heavy metal in to-be-restored lake deposit; and 2) checking a heavy metal benthophyte restoration list according to the detection result, and plating benthophyte with corresponding varieties and quantity in the to-be-restored lake according to the checking result. Compared with other methods, the method is simple to operate and low in cost, doesn't cause any secondary pollution, and is eco-friendly.

Description

technical field [0001] The invention relates to the field of in-situ restoration of heavy metals in lake bottom mud, in particular to a method for removing heavy metals in lake bottom mud by using submerged plants. Background technique [0002] Natural sources of heavy metals in lakes include volcanic eruptions, soil and rock weathering, atmospheric deposition, and other naturally occurring activities. These sources cause a large amount of heavy metals to accumulate in lake sediments. Mining, traffic exhaust, domestic and industrial sewage are the main anthropogenic sources of heavy metals in lakes. Heavy metals are harmful and potentially dangerous. Heavy metal ions in lakes usually only switch between different valence states or complex compounds, which are difficult to remove from the lake environment. Heavy metals are not only toxic to animals and plants in lakes, but also accumulate in the food chain, eventually threatening people's health. [0003] At present, the ...

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Problems solved by technology

[0004] The search found that the application number CN201310184951.4 and the patent name "A Method for Jointly Removing Copper Pollution in Water Body with Benthic Animals and Aquatic Plants" proposed a method for jointly removing heavy metal copper in water bodies with benthic animals and aquatic plants, but the focus In order to reduce the concentration of heavy metals in water, and only for copper, a heavy metal, the application has considerable limitations

Application number CN201510166817.0, patent name "A method for reducing heavy metals in river surface runoff with aquatic plants" uses aquatic plants to reduce heavy metals in rivers, which is difficult to apply to lakes with more complicated hydrological conditions than rivers

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