To promote ROHS environmental | protecting the next generation

" RoHS is electrical, electronic equipment the use of certain hazardous substances in" English abbreviation; RoHS has listed six kinds of harmful substances, including: lead cadmium mercury Pb, Cd, Hg, Cr6 + six valence chromium polybrominated diphenyl ether, two PBDE, polybrominated biphenyls PBB. The European Union has implemented in July 1, 2006 by RoHS, using or containing heavy metals and polybrominated diphenyl ether in two PBDE, polybrominated biphenyls PBB flame retardant electrical and electronic products will not be allowed to enter the EU market. But this is very humane standards not yet in our country executive, thus taking into account the cost of many manufacturers still use traditional, inexpensive production process. But there are also many" radical" is to the RoHS standard, so if you plan for children in six one during the assembling one platform computer should be selected in line with the RoHS standard products, the following editorial in addition to introduce several accords with RoHS standard products, give you the details about these heavy metals harmful to human body.
In today's many hazards to human health and intelligence of children in the" culprit", the lead is the harm is not little one. Lead into the human body, except the part through the feces, sweat excretion, the remaining after a few hours into the bloodstream, hinder the synthesis of the blood, causing anemia, headache, vertigo, fatigue, drowsiness, constipation and body aches; some have metallic taste mouth, arteriosclerosis, and retinal bleeding peptic ulcer symptoms and lead pollution. The child lead poisoning, growth retardation, loss of appetite, constipation, insomnia and walking inconvenience; if the pupil, accompanied by hearing impairment, hyperactivity, inattention, such as mental retardation phenomenon. This is because the lead into the body through the blood to enter the brain nerve tissue, so that nutrients and insufficient supply of oxygen, causing brain injury, severe cases may lead to permanent disability. Children especially in the stage of growth and development, more sensitive than adults for lead, into the body of the lead on the nervous system has a strong affinity, the absorption of lead several times higher than adults, suffer particularly severe. Lead in pregnant women in vivo will pass through the placental barrier, affect fetal development, causing malformation.
Chromium six was swallowed poison / inhalation of polar toxicants, skin contact may cause sensitive; more likely to cause hereditary genetic defect, suction may be carcinogenic, environmental persistence risk. Six chromium is easily absorbed by human body, it can pass through the digestive, respiratory, skin and mucosa of human. There have been reports of, through the respiratory air containing different concentrations of chromium anhydride with different degrees of hoarseness, nasal mucosa atrophy, serious when can also cause perforation of the nasal septum and bronchiectasis. Of the digestive tract by invasive can cause vomiting, abdominal pain. Percutaneous invasive will produce dermatitis and eczema. The greatest harm is a long-term or short-term contact or inhalation of a carcinogenic risk.
Cadmium is a toxic heavy metal, its compounds are also mostly is toxic, cadmium mainly absorption pathways for respiratory and digestive tract. Effects of cadmium on the human central nervous system damage, when cadmium poison into the human body is extremely difficult to excretion, easily disturbed renal function, reproductive function. As a result of cadmium pollution of long cycle, such as the characteristics of concealment. Cadmium can replace bone calcium, making severe skeletal bone softening, the virgin; cadmium can cause stomach dysfunction, so that the zinc cadmium ratio decreased, which led to the rise of hypertension. The toxicity of cadmium is the potential of cadmium in drinking water, even at concentrations as low as 0.1 mg / L, but also in the human body ( women in particular ) tissue accumulation, the incubation period may be as long as 10 years to 30 years, and not easy to detect early.
Production conditions, mainly in the form of metallic mercury vapor enter the body through the respiratory tract. It enters the body of accounted for about 80% of the volume of inhalation. Mercury gastrointestinal absorption of small, can be neglected. As a result of accidents ( such as thermometer damage ) of metallic mercury can also enter the body through the skin. Mercury to harm the human body mainly involving the central nervous system, digestive system and the kidneys, in addition to the respiratory system, skin, blood and eyes also have certain effect. Mercury enters the human body, will accumulate in the different parts of the body, thereby causing these parts damaged. Such as metal mercury mainly accumulate in the kidney and brain; inorganic mercury mainly accumulates in the kidney, and organic mercury mainly accumulate in blood and central nervous system. Mercury can also pass through the placental barrier and enter the fetus, fetal neurons from the center to the peripheral portion of the brain cortex mobile was inhibited, leading to cerebral palsy.
PBB is a major suspected carcinogen and potential carcinogens. Human and animal edible occurring after the poisoning, is only the beginning of the eyelid swelling, sweaty palms, the body gets the red knot in the mind, followed by nausea, vomiting, decreased liver function, systemic muscle pain, cough and other symptoms, and some even heal died. ( PBB, polybrominated biphenyls ).
Polybrominated diphenyl ethers ( PBDEs two, polybrominated diphenylethers ) is the main component of brominated flame retardants. German scientists found polybrominated diphenyl ether two high temperature thermal decomposition, and flame retardant materials react, produces toxic, carcinogenic polybrominated two benzo (PBDD ) and polybrominated dioxins generation two benzofuran ( PBDF ). Large numbers of polybrominated diphenyl ether two will affect the human brain function, damage to ovarian function, reduced male fertility. As a result of polybrominated diphenyl ether two is highly stable compounds, so the brominated flame retardants is one of permanent environmental organic pollutants in recent half century, is in the human body and environment accumulated fastest chemical substances. According to expert analysis, even now disable polybrominated diphenyl ether two, the chemical substances will still persist in the environment for decades.