In our daily lives, batteries have become indispensable items.
People can deal with batteries every day, Walkman, remote control, water heaters, etc., are the waste batteries properly recycled?
The ordinary dry batteries we use every day mainly include acid zinc-manganese batteries and alkaline zinc-manganese batteries. They all contain various metal substances such as mercury, manganese, cadmium, lead, zinc, etc. After the discarded batteries are abandoned, the outer casing of the battery will Slowly corrosive, the heavy metal substances will gradually penetrate into the water and soil, causing pollution.
The biggest characteristic of heavy metal pollution is that it cannot be degraded in nature and can only be eliminated by purification.
It is said that a button battery can pollute 600,000 liters of water after being abandoned in nature, which is equivalent to the amount of water consumed by a person in a lifetime, and China consumes 7 billion such batteries per year. Therefore, it is not too much to say that the used battery is a "pollution bomb".
The environmental impact of waste batteries and their treatment methods are still controversial. Many people believe that waste batteries are seriously harmful to the environment and should be recycled. But what should we do?
At present, the recycling methods of used batteries mainly include two metallurgical treatment methods, wet and dry.
Wet recovery is based on zinc, manganese dioxide and acid into the solution, after the solution is purified to produce metal zinc, manganese dioxide or chemical products and fertilizers. The recovered electrolyte contains heavy metals such as mercury, cadmium and zinc, which cause serious pollution and high energy consumption.
Dry recycling of used batteries is to oxidize and condense the metal and its compounds in the used batteries at high temperatures.
Compared with the wet method, the dry method can recover more heavy metals such as mercury, nickel, and zinc. However, since the atmospheric pressure metallurgy method for treating used batteries is carried out in the atmosphere, the air participates in the work, causing secondary pollution and high energy consumption. Therefore, there are many problems and difficulties in the recycling process.
In fact, we can start from ourselves, reduce the generation of used batteries, use environmentally friendly circulating batteries, and charge recycling, not only can reduce the generation of used batteries, but also protect our green homes and protect our health.