According to experts, test, a button dell Latitude E4300 battery can contaminate 600,000 liters of water; a rot in the ground at the battery, make use of one square meter of land lost value. Experts pointed out that the used batteries, if mixed with solid waste handling, the battery died and decayed, mercury, cadmium, lead, nickel and other heavy metal leaching will pollute water and soil, and through the food chain and ultimately endanger human health. People if mercury poisoning may cause central nervous system disease, the mortality rate 40%; cadmium level was set at IA carcinogen.
The greatest threat to the natural environment of the five substances in battery contains three types: mercury, lead, cadmium.
Mercury: what we called “mercury”, a carcinogen. Mercury and mercury compounds are toxic, the scientists found that mercury has a significant neurological toxicity, in addition to the endocrine system, immune system, also have adverse effects on children more vulnerable.
Cadmium: in the human body can easily cause chronic poisoning, is a highly toxic heavy metal, the main disease is emphysema, osteomalacia, anemia, is likely to paralyze the body. The excretion of lead into the human body the most difficult, it interferes with renal function, reproductive function. Japan shocked the world, “cries the pain” is due to cadmium 而致. Cadmium contaminated mine water and river water the soil, grain, grass, slowly enter the body through the food chain and accumulate in the kidneys and bones. To replace calcium in bone, so that severe bone softening, bone Cunduan; cadmium can cause stomach dysfunction, disturbance of human and bio-enzyme system in vivo zinc, cadmium to zinc ratio decreased, which led to hypertension increased. Cadmium toxicity is the potential. Even if the concentration of cadmium in drinking water as low as 0.1 mg / l, but also in humans (especially women) tissue accumulation, the incubation period of up to 10-3 years, and early imperceptible. Data indicate that the biological half-life of cadmium in the human body is 20 ~ 40 years. Human tissues and organs of cadmium poisoning is multifaceted, and treatment extremely difficult. Therefore, the countries of industrial emissions, “three wastes” in the cadmium have been very stringent requirements. Japan also provides rice cadmium more than 1 mg / kg is “cadmium rice”, not to eat. Because different levels of cadmium toxicity compounds, by any means, in addition to cadmium from waste water, only there is no way to change its inter separated from waste water, only to change their way of existence and the location of the transfer of its existence, does not eliminate its toxicity. Therefore, cadmium wastewater treatment should be combined with recycling.
Nickel: a carcinogen on the significant harm aquatic organisms, nickel salts can cause allergic dermatitis;
Lead: lead to anemia, neurological disorders, kidney damage, harm more children.