Urgent need! ! ! ! ! ! ! ! ! What is the harm of waste batteries to environmental protection?

1. Not all waste batteries are dangerous. Different types of batteries have great differences in environmental pollution and should be treated differently. Some batteries, such as alkaline dry batteries and nickel-hydrogen batteries, will not cause serious harm to the environment, but some batteries, such as cadmium-nickel batteries, contain harmful substances, which may directly endanger people's health. It is understood that 96% of the batteries produced in China are zinc-manganese batteries and alkaline-manganese batteries, and their main components are heavy metals such as manganese, mercury, zinc and chromium. No matter whether the waste battery is buried in the atmosphere or deep underground, its heavy metal components will overflow with leachate, causing pollution of groundwater and soil, which will seriously endanger human health over time.

2. Battery pollution has the characteristics of how much production is wasted, centralized production and decentralized pollution; Short-term use and long-term pollution. The battery is polluted because it contains the following heavy metals:

Lead: It can cause diseases such as nervous system (neurasthenia, numbness of hands and feet), digestive system (dyspepsia, abdominal cramps) and blood poisoning.

Mercury: Mental state change is the main symptom of mercury poisoning. Rapid pulse, muscle tremor, oral and digestive diseases. Minamata disease in Japan is a typical example of mercury poisoning.

Cadmium and manganese: mainly harm the nervous system. After cadmium poisoning, the patient's hands and feet are painful, and the whole body is prone to fracture, commonly known as "pain"

3. Ways of waste batteries polluting the environment:

The process of battery pollution is generally such a few processes. Toxic elements are originally sealed in the battery case and will not affect the environment. After long-term mechanical wear and corrosion, heavy metals and acid-base solutions inside leak out and enter the soil or water source; Then enter the animals and plants through various channels; Finally, it enters the human body through the food chain, endangering human health.

These processes can be briefly described as follows:

Battery → soil and water → plants and microorganisms → animal circulation → food → human body → deposition → disease.

Heavy metals ingested by organisms from the environment can be enriched thousands of times in higher organisms through the biomagnification of food chain, and then enter people's bodies through food and accumulate in some organs to cause chronic poisoning.

4. The ways in which waste batteries pollute the environment:

At present, there is no garbage sorting and recycling in China. Domestic waste disposal methods mainly include landfill, composting and incineration. The pollution effects of waste batteries mixed with domestic garbage in these three processes are as follows:

Burying: Heavy metals in waste batteries pollute water and soil through infiltration. (mainly dry batteries)

Incineration: waste batteries corrode equipment at high temperature, and some heavy metals volatilize in the fly ash of the incinerator, causing air pollution, and heavy metals accumulate at the bottom of the incinerator, causing pollution to the generated ash.

Composting: The high content of heavy metals in waste batteries leads to the decline of compost quality.