Metal Types and Hazards of Waste Batteries
Damage of used batteries
A button battery can pollute 600,000 liters of water, equal to a person's lifelong drinking water. A battery rotting in the ground can make a square metre of land lose its use value, so it is not too much to describe a section of waste batteries as a "pollution bomb".
The common dry batteries we use in our daily life are mainly acid zinc manganese batteries and alkaline zinc manganese batteries, which contain mercury, manganese, cadmium, lead, zinc and other metal substances. After abandoned batteries, the shell of batteries will corrode slowly, and the heavy metals in them will gradually enter the water and soil to form pollution. The greatest characteristic of heavy metal pollution is that it can not be degraded in nature, only through the purification effect, the pollution can be eliminated.
Metal Types and Damage Performance of Waste Batteries
Excessive accumulation of manganese in the body causes neurological dysfunction, which is characterized by comprehensive dysfunction in the early stage. The heavier patients showed heavy legs, monotonous language, rigid expression, cold love, often accompanied by mental symptoms.
Salts of zinc can precipitate protein and stimulate skin and mucosa. There is a risk of carcinogenesis, possibly chemical pneumonia, when the concentration in water exceeds 10-50 millihistory/liter.
Lead has the primary effect on nervous system, blood-activating system, digestive system, liver, kidney and other organs. It can restrain the metabolism of hemoglobin. It can also directly affect mature red blood cells. It has a great impact on infants and young children. It will lead to physical retardation in children. Slow lead poisoning can lead to mental retardation in children.
Nickel powder dissolves in the blood, participates in the internal circulation, has strong toxicity, can damage the central nervous system, cause vascular variation, and cause cancer in serious cases.
It is worth mentioning among these heavy metal pollutants. This kind of heavy metal does harm to human beings. For a long time, our country has to take part in a toxic substance-mercury or mercury compound in the production of dry batteries. The mercury content in alkaline dry batteries in our country reaches 1-5%, and that in neutral dry batteries is 0.025%. The mercury used in the production of dry batteries in our country is remarkable every year. Neurotoxicity, in addition to the endocrine system, immune system and other adverse effects, in 1953, the attack in Kyushu Island, Japan, shocked the world of the Minamata disease incident, to human beings sounded the alarm of mercury pollution.
Mercury, cadmium, zinc, lead and chromium were identified as hazardous wastes in the National List of Hazardous Wastes in 1998.
Mercury (Hg): Consumption of mercury-contaminated aquatic products, occurrence of methylmercury poisoning, Guan. dizziness, numbness of extremities, memory loss, neurosis, and even death, also affect the deformation of pregnant mothers and fetuses.
Lead (Pb): Consumption of lead-containing foods can affect enzymes and normal heme composition, affect the nervous system, lead accumulation in bones and kidneys, and have potential long-term effects.
Cadmium (Cd): into the skeleton to form bone pain, bone softening atrophy, prone to pathological fractures, and finally diet, died in pain.
Chromium (Cr): Chromium enters the body and distributes in the liver and kidney, presenting the pathology of hepatitis and nephritis.
The components of these batteries are sealed in the battery shell during the use of batteries, which will not affect the environment. However, through long-term mechanical wear and corrosion, the internal heavy metals and acids and alkalis leak out and enter the soil or water sources, will enter the human food chain through various ways.