The importance of water in life presentation. Presentation on the topic: “The role of water in human life! Water is life. Most people in the modern world think little about water, as long as they have enough of it

Lecture plan 1. Introduction. 2. Physiological significance of water. 3. Hygienic value of water. 4. Economic and technical significance of water. 5. Epidemiological significance of water. 6. Quality requirements drinking water. 6.1.Epidemiological safety of water Harmlessness chemical composition water Radiation safety of water Organoleptic properties of water. 7. Indicators of chemical contamination of drinking water 8. Methods of water disinfection. 9. Special methods for improving water quality.

The adult human body consists on average of 65% water. With age, the amount of water in the human body decreases. The human embryo contains 97% water, the body of newborns - 77%, by the age of 50 the amount of water in the body is only 60%. The bulk of water (70%) is concentrated inside the cells, and 30% is extracellular water.

8 Drinking water is water suitable for internal consumption that meets established quality standards. In accordance with SanPiN, Drinking water must be safe in terms of epidemics and radiation, harmless in chemical composition and have favorable organoleptic properties 3.2. The quality of drinking water must comply with hygienic standards before it enters the distribution network, as well as at the water collection points of the external and internal water supply network

9 80% of diseases in the world are caused by a lack of clean water. Good quality water important factor human life Water contains potential toxic elements

PHYSIOLOGICAL IMPORTANCE OF WATER All bio chemical reactions associated with the processes of digestion and absorption of nutrients, occur in aquatic environment. Together with salts, water takes part in maintaining the most important physiological constant of the body - the value of osmotic pressure. Due to its low viscosity, as well as the ability to dissolve various chemicals and enter into weak bonds with them, water is the main part of the blood and plays a role vehicle. Water is the basis of acid-base balance in the body, since it exhibits the properties of both acids and bases. All processes of absorption and excretion in the body also occur in an aquatic environment.

EXOGENOUS WATER Daily requirement person in water is 2.5-3.0 liters. Water enters the human body through drinking and food. WITH drinking water many macro- and microelements are supplied, such as calcium, magnesium, sodium, potassium, iodine, fluorine, etc.

EXCELLENCE OF WATER FROM THE BODY At rest, the following amount of water is excreted from the human body: through the kidneys - 1.5 l/day through the lungs - approximately 0.4 l through the intestinal tract - about 0.2 l. Another 0.6 liters of water is released through the pores of the skin during the process of thermoregulation of the body. Every day, about 3 liters of water are removed from the human body at rest. During work, in hot shops, in the summer in the field, in pathological conditions, water removal can increase to 8-10 liters.

Symptoms of dehydration of the human body (E. Adolf, 1952) With a decrease in water in the body (in% of body weight), the following is observed: 1-5% - thirst, malaise, economy of movement, loss of appetite, redness of the skin, irritability, drowsiness, fever body % - dizziness, shortness of breath, crawling sensation in the limbs, decreased blood volume, cessation of salivation, cyanosis, unclear speech, difficulty walking % - delirium, swollen tongue, difficulty swallowing, deafness, blurred vision, lethargy and numbness of the skin , painful urination, anuria % of body weight at air temperatures above 30 0C is fatal. 25% is fatal at any temperature.

Hygienic value of water Water is used for: removing sewage through the sewer network - 41%, maintaining body cleanliness - 37%, preparing food and washing dishes - 6%, for drinking - 5%, washing clothes - 4%, cleaning homes and public premises - 3%, watering streets and green spaces - 3%, car washing - 1%.

Epidemiological significance of water Contaminated water can cause: the occurrence of acute gastrointestinal infections, such as cholera, typhoid fever, paratyphoid fever, bacterial and amoebic dysentery, acute infectious enteritis, etc., which largely depends on the conditions of water supply, sanitary cleaning of populated areas places, level of sanitary culture of the population.

Good quality drinking water must be: 1. Safe from an epidemiological point of view. Water should not contain pathogenic microbes, viruses and other biological impurities that are hazardous to the health of consumers. 2. Not harmful in chemical composition (that is, to be the most favorable from a physiological point of view). And do not limit its use in everyday life. 3. Radiation-safe. 4. HAVE GOOD ORGANOLEPTIC PROPERTIES (be transparent, colorless, have no taste or smell).

Vizhivanne pathogenic microorganisms in water Microorganisms Visibility (in days) in water Kolodeznaya River E. coli Pathogens typhoid fever 71, Dysentery bacteria Vibrio cholerae 1-920.5-92 Leptospira 7-75 up to 150 Causative agents of tularemia Brucella 4-45-

Microbiological indicators of the safety of drinking water Name of indicators Units of measurement Standards 1 Number of bacteria in 1 cm 3 of water being tested (CMU) Colony-forming units (microorganisms)/cm 3 CFU/cm 3 no more than 100* 2 Number of bacteria of the group of coliforms (colony-forming microorganisms) in 1 dm 3 of water that is being examined (coliform index) Colony-forming units (microorganisms)/ dm 3 no more than 3** 3 The number of thermostable E. coli (fecal coliforms - FC index) in 100 cm 3 of water that is being examined Colony-forming units (microorganisms) /100 cm 3 COO/100 cm 3 absence *** 4 Number of pathogenic microorganisms in 1 dm3 of water being tested Colony-forming units (microorganisms)/dm 3 COO/dm 3 absence *** 5 Number of coliphages in 1 dm3 of water being tested Plaque-forming units/dm 3 BOO/dm 3 none ***

Toxicological indicators of the harmlessness of the chemical composition of drinking water Name of indicators Units of measurement. Standards (no more) Class hazard and inorganic components of 1 AlyuminiMg/DM 3 0.2 (0.5)*2 2 2 Barrymg/DM 3 0.12 3 Myhykmg/DM 3 0.012 4 SELENMG/DM 3 0.012 5 Swinets/DM 3 0.012 6Nicelmg/DM 3 0.13 7Nitratemg/dm 3 45.03 8Ftormg/dm 3 1.53

Organic components 1 Trihalomethanes (THM, sum) mg/dm 3 0.12 chloroform mg/dm 3 0.062 dibromochloromethane mg/dm 3 0.012 tetrachlorocarbon mg/dm 3 0.0022 2 Pesticides (total) mg/dm 3 0.0001** Integral indicators 1O acidity (KMnO 4) mg/dm 3 4.0- 2Total organic carbon mg/dm 3 3.0- Note:* - the value indicated in brackets is allowed when treating water with reagents that contain aluminum; ** - the list of control pesticides is established taking into account the specific situation.

When drinking water with an increased concentration of nitrates, methemoglobinemia may occur, which is accompanied by toxic cyanosis. Most often, methemoglobinemia affects children whose milk formulas are prepared with water in which the nitrate content exceeds 45 mg/dm 3. Nitrates in the digestive canal of children with the help of acidophilic microflora are restored in nitrites. The latter, being absorbed into the blood and combining with hemoglobin in the blood, form methemoglobin, which is not able to carry oxygen.

Increased fluorine content The fluorine content in water is more than 5 mg/dm 3 - causes damage not only to the teeth but also to the bone and joint system. An increased fluorine content - over 1.5 mg/dm 3 - causes fluorosis, which manifests itself as damage to tooth enamel in the form of pigmented yellow and brown spots.

Name of indicators Units of measurement Standards (no more) Hazard class 1OdorPR*2- 2TurbidityNOMe*0.5 (1.5)***- 3Color degree20 (35)- 4TastePR*2- 5Hydrogen index, pH, in the range of one 6.5-8 ,6- 6 Total mineralization (dry residue) mg/dm (1500) - 7 Total hardness mg-eq/dm 3 7 (10) - 8 Sulfate mg/dm (500) 4 9 Chloride mg/dm (350) 4 10 Copper mg/dm 3 1.03 11 Manganese mg /dm 3 0.13 12Irong/dm 3 0.33 13Chlorophenolg/dm 3 0.00034 Organoleptic indicators of drinking water quality

The overall hardness of water is predominantly determined by the presence of carbonates, bicarbonates, chlorides, sulfates and other calcium and magnesium compounds. There are carbonate (removable) and permanent hardness (irremovable). Calcium from many foods is absorbed only 30%, while calcium from drinking water is 90%.

Chlorides (chlorine ion). Fresh waters predominantly contain up to mg/dm3 of chlorides. If their amount exceeds mg/dm3, such waters have a salty taste and adversely affect gastric secretion. The chloride content in tap drinking water should not exceed 250 mg/dm3, in some cases up to 350 mg/dm3 is allowed.

Sulfates (sulfate ion) in quantities above 500 mg/dm 3 give water a bitter-salty taste and can cause dyspepsia (especially with a simultaneous high magnesium content in the water) in people who are not accustomed to such water. The content of sulfates in drinking water should not exceed 250 (350) mg/dm3.

Salts of iron (more than 0.3 mg/dm 3) and manganese (more than 0.1 mg/dm 3) give water an astringent taste. The taste of tea prepared with such water also deteriorates significantly. Such water is unsuitable for some processes in Food Industry adds to butter, cheese and other food products unpleasant taste in everyday life (stains laundry during washing, etc.). Chemical indicators of water source contamination. These include substances that are found in the urine and feces of people and animals, or their breakdown products ( organic compounds

, ammonia, nitrites, nitrates, chlorides, etc.). These compounds themselves, in the quantities in which they are found in fresh water, are harmless to human health and only indicate contamination of the soil and water. But along with them, water can also contain pathogenic microorganisms.

Special methods for improving water quality Deodorization - achieved by aerating water, treating it with oxidizing agents, filtering through a layer of activated carbon, etc. Deferrization - is achieved by aeration in cooling towers. Softening – filtration through ion exchange filters. Desalination – ion exchange filters, electrodialysis, freezing. Decontamination – filtration through ion exchange filters. Defluoridation of water – ion exchange filters. Fluoridation is the addition of fluoride or sodium fluoride to water. Water is life Most people in modern world They think little about water as long as they have enough of it. In the West, even those who think about it usually simply wonder about the quality of municipal water supplies, or perhaps view it as a product that perhaps should be consumed more. Most people in the modern world think little about water as long as they have enough of it. In the West, even those who think about it usually simply wonder about the quality of municipal water supplies, or perhaps view it as a product that perhaps should be consumed more. We watch obediently as millions of dollars are spent every year to convince us to drink animal milk. And it hardly occurs to us to think why no one spends money discussing the usual old good water . For what? It can't be like that a common thing

The importance of water in human life Water is beneficial in everything: cooking, washing, cleaning, washing and in the production of various products. Water is beneficial in everything: cooking, washing, cleaning, washing and in the production of various products. The role of water in maintaining health is very important, since constant dehydration of the body leads to a large number of diseases. The role of water in maintaining health is very important, since constant dehydration of the body leads to a large number of diseases. Everyone knows the importance of water; if there is no water in our body, there will be no us. However, we still get sick. Everyone knows the importance of water; if there is no water in our body, there will be no us. However, we still get sick.

The water cycle in nature The water cycle in nature (hydrological cycle) is the process of cyclic movement of water in the earth's biosphere. Consists of evaporation, condensation and precipitation. The water cycle in nature (hydrological cycle) is the process of cyclic movement of water in the earth's biosphere. Consists of evaporation, condensation and precipitation. The seas are losing due to evaporation more water than is obtained with precipitation, on land the situation is reversed. Water continuously circulates on the globe, while its total remains unchanged. The seas lose more water due to evaporation than they receive through precipitation; on land the situation is reversed. Water continuously circulates on the globe, while its total amount remains unchanged. On earth, water exists in three states of aggregation: liquid, solid and gaseous. Without water, living organisms cannot exist. In any organism, water is the medium in which chemical reactions occur, without which living organisms cannot live. Water is the most valuable and most necessary substance for the life of living organisms. On earth, water exists in three states of aggregation: liquid, solid and gaseous. Without water, living organisms cannot exist. In any organism, water is the medium in which chemical reactions occur, without which living organisms cannot live. Water is the most valuable and essential substance for the life of living organisms.

Object of study in my work - water. Object of study in my work - water. Subject of study– the role of water in human life. Goal of the work– study the structure of water and determine its place in human life. Tasks: 1. Study and analyze information on this topic. 2. Find out how a water molecule behaves under various influences on it. 3. Summarize the data obtained and draw a conclusion. My hypothesis:

Water is the basis of life on Earth.
analysis of literary and historical

sources of information;

generalization of the obtained data.
The name of water dates back to time immemorial and since that time water has been called any “living” moisture that is so necessary for the life of people, animals and the nature that surrounds us.

The name of water dates back to time immemorial and since that time water has been called any “living” moisture that is so necessary for the life of people, animals and the nature that surrounds us.

There is no exact definition of why water was called water, since each nation has its own name, which determines the meaning of water for others

Why was water called water?

SEAS

LAKES

RIVERS

WHERE IS WATER CONTAINED ON EARTH? There is also water underground (springs). Huge accumulations of ice are located near the Northern and

South Pole

. There is ice on land and in the ocean.

This is what our planet would look like then. An unpleasant sight, isn't it?

Imagine

what on earth suddenly

all the water was gone.

The body of a jellyfish is 90–95% water.
In the body of animals, water usually makes up more than half the mass.
Water is found in all parts of plants.
There is a lot of juice in fruits - watermelon, orange, lemon.

This juice is water with various substances dissolved in it.

But even dry plant seeds contain water.

100 kg, 80 kg - water

100 g, 85 g - water 2 kg, 1.5 kg - water A person is 75-80% water. A person is 75-80% water.

A person can only live for 3 days without water.
Water structure Water molecule Water cluster Water cell The human body is approximately 75-80% water, therefore, The human body is approximately 75-80% water, therefore
Water is the key to the existence of a healthy body. Since water is not just a liquid, but structured

substance, the body, for stable operation, requires water with a certain structure. Violation or modification of this structures water affects the condition of the body.

Water Crystal Differences

Regular tap water Holy water

Music in water crystals

Word crystals

LOVE

HOPE

LOVE

SOUL

This water was told

THANK YOU SORRY

FOOL
listen to music via mobile phone?

What is the importance of water for humans?

Water in the life of humans, plants and animals

Fields and forests drink water.
Without it, neither animals, nor birds, nor people can live.

Water in human life

Water "extracts" electricity working at power plants.
Water washes all people, cities, cars, roads.

Water in human life

Water is the largest and most convenient road. Ships sail along it day and night, carrying various cargoes and passengers.

Water in human life

Without water:

do not knead the bread dough,
not preparing concrete for construction,
you can’t make paper, fabric for clothes, rubber, candy, or medicine.

Conclusion Water is vital for humans. Water is not only a source of life, but also an important component of the human body.

Presentation on the topic:

The role of water in nature and human life

Water is the source of life, Source of bright days. Look immaculate Into a rushing stream. Everyone wants to get drunk Take care of the rivers Lakes, oceans And small ponds.

Waterfall

Where is water found on Earth? Water is a unique wealth of living nature. It is difficult to find a place on our planet where there is no water.

Ocean

Sea

Water is a liquid.
Clean water is clear. If we put a spoon in a glass of water, we can easily see it. The water is colorless.
Water has no smell.
Many substances dissolve in water.
When heated, water expands and when cooled, it contracts.
When heated to 100 degrees, water turns into steam.

Three states of water

Solid Liquid Gaseous

Ice, snow, hail. Water Steam

The meaning of water in nature

Water is the most common substance on Earth. According to evolutionary theory, life on Earth originated in water. In nature, water plays a vital role. Water is the habitat of many plants and animals.

Water cycle in nature

The importance of the water cycle in nature is simply enormous. It is this process that allows animals and plants to receive the moisture so necessary for their life and existence.

Water pollution

Water pollution is the process of saturation of water bodies harmful substances, production waste and household waste, as a result of which water loses most of its functions and becomes unsuitable for further consumption.