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Soil background value and heavy metal pollution (1)

 Last Update: 2021-09-07
 Source: Internet
 Author: User

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(1) Soil background value

The soil background value, also known as the soil background value, refers to the original chemical composition and content of the soil that has not been affected by pollution in the course of its existence and development in nature

Table 3-1 National soil (A layer) background value

(2) Industrial production

The discharge of the "three wastes" (waste water, waste residue, and exhaust gas) containing heavy metal elements in industrial production is one of the main pollution sources of heavy metals in the soil environment

(1) Cadmium pollution

(2) Lead pollution

(3) Copper pollution

(4) Chromium pollution

(5) Mercury pollution

The burning of fossil fuels and the smelting of mercury-containing metal minerals are the main sources of mercury in the atmosphere

(6) Arsenic pollution

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