After lead enters the human body, most of it is excreted in the feces and sweat, and most of it dissolves into the blood after a few hours, hindering the synthesis of blood, causing anemia in the body, headache, dizziness, fatigue, drowsiness, constipation and limb soreness; there are some metal mouth taste, arteriosclerosis, peptic ulcers and retinal bleeding and other symptoms; child lead poisoning occurs retardation, loss of appetite, difficulty walking and constipation, insomnia; if pupils, accompanied by hyperactivity, I heard disorder , lack of concentration, mental retardation and other phenomena. This is because lead enters the human body and invades the brain nerve tissue through the blood, resulting in insufficient supply of nutrients and oxygen, resulting in damage to brain tissue. Severe cases can lead to permanent disability. Lead enters the human body of women of childbearing age, leading to infertility, miscarriage, death, or maternal placental barrier, affecting fetal development, causing deformity, etc., and can be transmitted to the infant by lactation to cause lead poisoning in maternal pediatric children, and then children's physical development retardation , IQ is reduced.
The lack of paper making raw materials is a common problem, the use of seasonal growth plants or wild trees etc for the paper pulp is an effective solution.However, using this material pulping will produce a lot of black liquor containing inorganic compounds, how can get more fiber pulp, low investment to processing black liquor which can let it reach the water recycling or reach the discharge standard of environmental protection, it has been a worldwide problem all the time.
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