The harm of heavy metals to human body is common:
Mercury: It sinks directly into the liver after ingestion, which is extremely harmful to the visual nerve of the brain. Natural water containing 0. 1 ml per liter of water is highly toxic. Drinking water containing trace mercury for a long time will cause cumulative poisoning.
Chromium: It will cause numbness of limbs and mental abnormality.
Cadmium: causes hypertension and cardiovascular and cerebrovascular diseases; Destroy bone calcium, resulting in renal insufficiency.
Lead: It is one of the most toxic heavy metal pollution, and it is difficult to eliminate once it enters the human body. Direct damage to human brain cells, especially fetal neural plate, can cause congenital shallow cerebral sulcus and mental retardation; Leading to dementia and brain death in the elderly.
Cobalt: Radiation damage to skin.
Vanadium: It hurts the heart and lungs and causes abnormal cholesterol metabolism.
Antimony: containing arsenic, silver jewelry will turn brick red, which is harmful to the skin.
Thallium: It can cause polyneuritis.
Manganese: Too much will make people hyperthyroidism.
Tin and lead are important components in the ancient highly toxic drug' Qiu', which solidified into blocks after entering the abdomen, causing death.
Zinc: Excessive intake will lead to zinc poisoning.
Any of these heavy metals can cause headache, dizziness, insomnia, forgetfulness, insanity, joint pain, stones, cancers (such as liver cancer, stomach cancer, intestinal cancer, bladder cancer, breast cancer, prostate cancer, Blackfoot disease and deformed children) and so on. It is recommended to pay attention to diet, otherwise it will bring a lot of harm to the body once it precipitates in the body.
2. Water pollution
The pollutants in water are complex and diverse. There are about 1200 kinds of toxic and harmful substances in tap water, which can be roughly divided into five categories according to categories:
1. Rust, sediment and floating objects;
2. Insecticides, fertilizers and detergents;
3. Viruses, bacteria and organic matter;
4. Different colors, smells and inorganic substances;
5. Radioactive viruses, bacteria and particles.
The sources of the above pollution are:
1. Industrial waste gas, waste water, waste residue, waste and automobile exhaust, etc.
2. Agricultural pesticides and fertilizers; Chemical reagents, additives, etc.
3. Domestic garbage, waste water, sewage, feces, etc.
4. Medical wastes, viruses, bacteria, corruption, etc.
5. Scientific research on radiation, damage and chemical radioactive pollution.
4. Food pollution
Heavy metals generally refer to metals with a density greater than 4.5g per cubic centimeter, such as lead (P b), cadmium (Cd), chromium (Cr), mercury (Hg), copper (Cu), gold (Au) and silver (Ag). Some heavy metals enter the human body through food, which interferes with the normal physiological function of the human body and harms human health. They are called toxic heavy metals. These metal elements mainly include lead (Pb), cadmium (Cd), chromium (Cr) and mercury (Hg).
However, the poisoning rate is very low, so don't worry, but just don't buy three no products. This is only about harmful consequences.
Heavy metal mercury: it mainly harms the central nervous system, damages the brain, and causes symptoms such as numbness of limbs, dyskinesia, reduced vision, hearing difficulties and even death due to heart failure caused by mercury poisoning encephalopathy.
Severe poisoning can cause oral diseases, nausea, vomiting, abdominal pain, diarrhea and other symptoms, and can also cause damage to skin mucosa, urinary and reproductive systems. Under the action of microorganisms, methylmercury is methylated, which is more toxic than mercury.
Heavy metal cadmium Cd: It can accumulate in human body and cause acute and chronic poisoning. Acute poisoning can cause vomiting blood, abdominal pain and finally death. Chronic poisoning can damage renal function, destroy bones, and cause bone pain, osteomalacia and paralysis.
Heavy metal chromium: it is irritating and corrosive to skin, mucous membrane and digestive tract, causing skin congestion, erosion, ulcer, nasal perforation and skin cancer. It can accumulate in the liver, kidney and lungs.
Metalloarsenic-like As: Chronic poisoning can cause skin lesions, nervous system, digestive system and cardiovascular system disorders, and has cumulative toxic effects, destroying the metabolic system of human cells.
Heavy metal lead: it is mainly harmful to nerves, hematopoietic system and kidneys, damages the skeletal hematopoietic system, and causes anemia, brain hypoxia, brain edema, abnormal movement and sensation.
5, toxic and side effects
It is not a new topic to add heavy metals to acne products from time to time. Most of them have added mercury with whitening effect, and most of them claim that acne products have the efficacy of whitening and fading acne marks.
But many people don't know that once these heavy metals penetrate into the skin and body, any of them will cause headache, dizziness, insomnia, forgetfulness, insanity, joint pain, stones, cancer and so on.
Especially cells, organs, skin, bones and nerves of digestive system and urinary system. Moreover, the metabolism of heavy metals is difficult, and once it is precipitated in the body, it will bring a lot of harm to the body.
Extended data:
The original meaning of heavy metals refers to metals with specific gravity greater than 5 (generally speaking, the density is greater than 4.5).
Grams of metal per cubic centimeter), including gold, silver, copper, iron, lead and so on. Heavy metals accumulate in human body to a certain extent, which will cause chronic poisoning.
In fact, there is no strict and unified definition of what heavy metals are. As far as environmental pollution is concerned, heavy metals mainly refer to heavy metal elements with obvious biological toxicity such as mercury, cadmium, lead, chromium and metalloid arsenic.
Heavy metals are difficult to biodegrade, but on the contrary, they can be enriched thousands of times under the biomagnification of the food chain and eventually enter the human body.
Heavy metals can interact strongly with protein and enzymes in human body, making them inactive, and may accumulate in some organs of human body, leading to chronic poisoning.
References:
Baidu encyclopedia-heavy metals