What pollution does heavy metal waste cause?

With the increase of population and the continuous development of industry, the quantity of various wastes is also rising. Therefore, waste not only occupies resources, but also pollutes the environment, so their recycling and disposal is an important issue. There are many kinds of waste, such as plastic products, metal waste, rubber products, etc. Among them, the recycling of metal waste and the recovery of plastic metal mixture, people mainly use metal shredder equipment for shredding and recycling. Because of the large proportion of heavy metal waste in all types of hazardous waste, they endanger the environment in a variety of ways. In the treatment, except for a part that can be recycled, most of them need to be stabilized to achieve the purpose of harmlessness. Some metallurgical solid wastes, due to the presence of pollutants such as leached heavy metals, cannot be directly discharged into the environment and should be pretreated before being subjected to a final environmentally sound treatment.