What are the health effects of lead water quality?

The damage of lead to the human body is mainly manifested in the nervous system, digestive system and blood system, most of which are chronic, mild poisoning, and the symptoms are relatively mild, and neurasthenia syndrome is common.

Common symptoms:1Neurological symptoms:

In the early stage, neurasthenia syndrome, headache, dizziness, dreaminess, memory loss, fatigue, muscle and joint soreness appear. In severe cases, peripheral neuritis can occur, manifesting limb sensation and movement disorders, and in severe cases, toxic encephalopathy can occur, causing mental disorders.

2.Digestive symptoms: indigestion, epigastric discomfort after meals, belching, nausea, abdominal pain and so on may occur in mild poisoning.

When acute poisoning or chronic poisoning occurs in an acute attack, abdominal cramps can occur, and abdominal pain is mostly around the umbilicus or lower abdomen, and the pain is severe and unbearable during the attack, so it is called 'lead colic', and typical lead colic is rare at present. After exposure to lead, if the oral hygiene is not good, blue lines often appear on the edge of the gums, called lead lines, which are formed by the accumulation of fine particles of lead sulfide.

3.Hematologic symptoms: mainly anemia, usually hypochromic macrocytic or microcytic anemia, due to anemia and facial ** vasoconstriction, may appear pale, the so-called 'lead appearance'.

4.Other site lesions: Kidney damage may occur with lead poisoning, and in rare cases, protein, red blood cells, and casts may be seen in the urine. It is often accompanied by high blood pressure. Female patients may have menstrual irregularities, miscarriages, and preterm births.

Lead is a gray-blue metal with a melting point of 327 degrees, when heated to 400-500 degrees, the vapor of existing lead escapes, can quickly condense in the air, oxidized into the form of smoke and dispersed in the air, brought into the digestive tract, dissolved and absorbed.

Excessive intake of lead and other heavy metals has no benefit to the body, excessive lead can even cause lead poisoning, oral administration of 2-3 grams of lead can poison people, about 50 grams can make people die. Therefore, it is important to pay attention to the intake of lead in daily life and improve the awareness of self-protection.

With the progress of society, the improvement of people's living standards and health requirements, and the enhancement of global environmental awareness, lead pollution has also attracted more and more attention.

The national standard stipulates that the lead content of drinking water is far from 50 micrograms per liter.

Excessive water quality will cause an increase in the lead load of the human body, which will damage the neurobehavioral function of the human body to a certain extent, and have a chronic poisoning effect after being absorbed by the human body. It causes harm to the kidneys and nervous system, and causes lead poisoning symptoms such as hand and foot paralysis, peripheral neuropathy, hypertension and gout, and is carcinogenic; It is highly toxic to the elderly, women and children, especially to children who have been exposed to lead-containing environment for a long time.

Experts have found that there are two main channels for lead pollution to enter the human body: one is inhaled through the respiratory tract through polluted air; The second is through food and water through the mouth. The lead in PVC plastic pipes mainly comes from the heat stabilizer lead salts in them. During the use of PVC plastic water supply pipes containing lead salts, heavy metal lead will be precipitated from the pipes, which will directly cause pollution of drinking water.

Therefore, the use of substandard PVC pipe products can lead to lead poisoning.