What are the dangers of water pollution to people?

1. Cause acute and chronic poisoning. Water bodies can be poisoned by drinking water or the food chain when they are contaminated with toxic and harmful chemicals. The famous Minamata disease and painful disease are caused by water pollution.

2. Carcinogenicity. Certain carcinogenic chemicals such as arsenic, chromium, nickel, beryllium, aniline, benzo(a)pyrene and other polycyclic aromatic hydrocarbons and halogenated hydrocarbons can be adsorbed by suspended solids and sediments, and can also accumulate in aquatic organisms.

3. Infectious diseases with water as the vector. Biological pollutants such as human and animal feces pollute water bodies, which may cause bacterial intestinal infections such as typhoid, dysentery, enteritis, cholera, etc.; Common intestinal viruses such as poliovirus, coxsackievirus, infectious hepatitis virus, etc., can cause corresponding infectious diseases through water pollution. 1989 Shanghai"Hepatitis A events", which is caused by water pollution.

When water enters the human body, it first goes to the stomach, then enters the intestines, is absorbed into the liver through the intestines, and then enters the blood circulation after detoxification by the liver. But what! The liver is only responsible for detoxification and not detoxification, and if we drink water with a lot of impurities for decades, where does all the garbage in the water go?

Here we have to mention another very important organ of the human body - that is, the kidney, which is these two guys who filter out the impurities that enter our body (the kidney is the largest filter officer in the human body), it is constantly filtering our blood all the time, and the useful ones are left to let them re-enter the blood circulation, and the useless ones are filtered out and stored in the bladder, and then excreted with urine. It is said that polluted water has a great impact on the kidneys.

Water pollution depends on how it is not polluted, such as bacterial pollution, some infectious bacteria will cause people to suffer corresponding diseases. Such a general fungus contamination can cause intestinal discomfort. If it is heavy metal pollution, the accumulation of metals in the human body causes people to cause cancer and is more likely to cause death due to incurable diseases.

In general, if the water is polluted, it will cause harm to the human body and even cause death.

1.The harm of water pollution to human health.

Water is the main component of the human body, and all physiological activities of the human body, such as transporting nutrients, regulating temperature, and excreting waste, must be completed by water. Drinking contaminated water or eating food contaminated with water can be a health hazard.

High fluoride content in drinking water can cause tooth spots and pigmentation, and in severe cases, tooth loss. On the other hand, if the fluoride content is too low, dental caries and other diseases may occur. When the management of biological pollutants such as human and animal feces is improper, it can also pollute the water body, and in severe cases, it can cause bacterial intestinal infectious diseases, such as typhoid, cholera, dysentery, etc., and can also cause some parasitic diseases.

In the 19th century, cholera often occurred in some European cities due to unclean drinking water, and in 1882, the city of Hamburg, Germany, caused an epidemic of cholera due to unclean drinking water, killing more than 7,500 people. Water bodies also contain some carcinogenic substances, and farmers often apply some herbicides or insecticides, such as aniline, benzopyrene and other polycyclic aromatic hydrocarbons, which can enter the water body. These contaminants can accumulate in suspended solids, sediment and aquatic organisms, and long-term consumption of such water can lead to cancer.

According to statistics, the cancer mortality rate caused by water pollution was twice as high in the 90s of the 20th century as it was 30 years ago.

2.Impact on industrial production.

Polluted water quality can affect the output and quality of industrial products, causing serious economic losses. Water pollution also increases the cost of industrial water treatment.

3.Impact on agriculture and fishery production.

The effect of farmland moisture on the development and growth of crops is not only manifested in quantity, but also in quality. The use of polluted natural water bodies or the direct use of polluted water to irrigate farmland can damage the soil, affect the growth of crops, reduce yields, and in severe cases, cause no harvest. When the soil is polluted by polluted water bodies, it will lose the functional role of the soil for a long time in the future, resulting in a serious waste of land resources.

According to statistics, more than 1.6 million hectares of farmland have been reduced in grain production due to water pollution, amounting to 2.55 billion kilograms. Water is also a medium for the survival of aquatic organisms. When water is polluted, it endangers the growth and reproduction of aquatic organisms and causes a significant reduction in fisheries production.

According to statistics, the economic loss caused by the quality of fish is as much as 30 billion yuan every year.

1.Endangering people's health. Through drinking water or the food chain, contaminants enter the body and cause acute or chronic poisoning.

Water contaminated with parasites, viruses or other pathogenic bacteria can cause a variety of infectious and parasitic diseases. Water contaminated with cadmium can cause kidney and bone lesions, and ingestion of 20 mg of cadmium sulfate can cause death. Lead-contaminated water can cause anemia, insanity.

Water containing organophosphorus pesticides will accumulate in fat, causing harm to the endocrine, immune function and reproductive function of humans and animals. Data shows that 80% of the world's diseases are water-related. Typhoid, cholera, gastroenteritis, dysentery, and infectious liver are the five major human diseases, all of which are caused by the uncleanness of water.

2.Corroded industrial equipment and reduced production capacity. After industrial water pollution, more treatment costs must be invested, resulting in a lot of waste of human and financial resources, and the water requirements for the food industry are more stringent, and the water quality is unqualified, which will stop production.

This is also the main factor for the low efficiency and poor quality of industrial enterprises. The use of sewage in agriculture reduces crop yields, reduces quality, and even harms people and animals, pollutes large areas of farmland, and reduces soil quality. The consequences of marine pollution, such as oil pollution, which kills seabirds and marine life, are also severe.

3.Destruction of the ecological environment. The discharge of human domestic sewage leads to eutrophication of water bodies, the growth of algae and other plants in the water, the decline of dissolved oxygen in the water bodies, and even the appearance of oxygen-free layers.

As a result, a large number of aquatic animals and plants die, and the water body stinks to form "dead lakes", "dead rivers", "dead seas", and then turn into swamps. This kind of water has a strong smell, dark color, and many bacteria, and the water quality of this water is poor and cannot be used directly.

1) Endangering human health.

Hualu.com. (2) Reduce the yield and quality of crops.

3) Affect the yield and quality of fishery production.

4) Restricting the development of industry.

5) Accelerate the degradation and destruction of the ecological environment.

6) Causing economic losses.

According to the World Health Organization (WHO), 80% of diseases and 50% of child mortality are related to poor drinking water quality. Pollution causes about half of the world's hospital admissions.

The hazards caused by water pollution mainly include the following three aspects:

Water bodies are polluted by pathogenic microorganisms (such as bacteria), which can cause infectious diseases such as cholera, typhoid, polio, hepatitis A, and bacillary dysentery.

Water bodies are polluted by heavy metals (HG, PB, CR, CD, etc.) and other toxic inorganic substances (such as fluoride, arsenide, nitrite, etc.), which can cause various poisoning and diseases.

Water bodies are polluted by organic substances such as phenol, benzene, chloroform, carbon tetrachloride, pesticides, synthetic detergents, etc., which can cause various poisoning and diseases, such as blood diseases, cancer, etc., especially organic nitrate compounds and organohalogen compounds in water. They are strong carcinogenic and tumorogenic substances to animals, plants and human bodies, and have attracted widespread attention and attention from the international scientific and technological circles and medical circles.

The relationship between heavy metals, organic matter and disease in water.

Life science and modern medicine both tell us that water is a good solution, and in our daily drinking water, it contains not only some essential and beneficial substances for life, but also many things that are harmful to health.

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Lead - nephropathy, neuropathy; arsenic - black foot disease, neuropathy; Sulfur – diseases of the digestive system; cadmium – bone deformation, back pain; Phosphorus – organophosphate poisoning; chlorine – produces carcinogens; Aluminum – acid-base imbalance; Nitrate – carcinogenic; chloroform – carcinogenic; Bacteria – bacterial infectious diseases; Viruses – viral infectious diseases; pesticides – poisoning, hepatitis; radioactive particles – carcinogenic; Peculiar odor - loss of appetite, toxins; sediment – stones, enteritis; organic matter – toxins; Fluoride – tooth decay, carcinogenic; Fluorescent – blackfoot disease.

Lack of trace elements can cause those diseases:

Iodine deficiency – enlargement of the thyroid gland; Fluoride deficiency – dental caries; Calcium deficiency – osteomalacia, myocardial lesions; Iron deficiency – nutritional anemia; Zinc deficiency – anorexia in children, immature sexual function, spontaneous loss of taste, poor wound healing; Manganese deficiency* – affects human development, bone deformity, sexual dysfunction; Molybdenum deficiency – esophageal cancer; Magnesium deficiency – ventricular fibrillation.