Soil background value and heavy metal pollution (2)

(3) Domestic garbage

Domestic waste refers to solid waste generated in urban daily life or activities that provide services for urban daily life, and solid waste that is regarded as urban domestic waste by laws and administrative regulations

The heavy metal pollution in municipal solid waste comes from the direct contribution of metal ions in the metal products or metal-plated products in the waste body (such as batteries, waste lamps, waste electrical appliances, and various discarded living materials coated with metal on the surface).

(4) Agricultural production

The use of sewage for irrigation in agricultural production and the use of agricultural inputs (fertilizers, pesticides, additives, etc.

1.

Table 3-2 Water quality standards for farmland irrigation (mg/L)

2.

Phosphate fertilizer use has a certain correlation with soil cadmium pollution, because phosphate fertilizer contains a certain amount of cadmium and other heavy metals

The extensive use of pesticides can also cause heavy metal pollution.

Other agricultural production activities, such as the application of lime, organic waste and sludge, will also increase the input of heavy metals such as cadmium in farmland soil

Related links: Soil background value and heavy metal pollution (1)