Is the water in the sea drinkable and why

Drinking seawater directly will not really quench your thirst, but will further dehydrate the body.

This is because seawater contains a lot of salt, which is higher than the concentration of fluid in the cells of the human body. When a person drinks seawater, the water in the cells of the human body is lost. The cell membrane of the human body is a semi-permeable membrane, which is covered with many small pores, and only water molecules can pass freely, while chloride ions, sodium ions, etc. in seawater cannot pass directly.

However, since the concentration of seawater is greater than the concentration of the fluid in the cells of the human body, the difference in the concentration of the two will drive the water in the lower concentration liquid to penetrate through the semipermeable membrane to the higher concentration side until the concentration of the liquid on both sides of the membrane is nearly equal, just as water flows to a lower place, and the water will penetrate through the semipermeable membrane to the "thick" place. Therefore, after drinking salty seawater, the water in the human cells will flow out through the cell membrane, resulting in serious dehydration of the cells. According to analysis, if you drink 100 grams of seawater, human cells will instead excrete about 150 grams of water.

No! Seawater contains many metal chlorides, such as magnesium chloride, aluminum chloride, sodium chloride, and many more.

Some of these metal substances will have hallucinogenic effects if drunk excessively, and some are highly toxic to the human body, so even if a shipwreck occurs, you must not drink seawater to maintain life, so you can only let yourself die faster!

Definitely not.

If a person drinks seawater, since the concentration of seawater is higher than the concentration of the solution in the cells of the human body, then the water in the cells of the human body will flow out of the cells.

In the end, people will get thirstier and thirstier the more they drink, and eventually die of thirst.

Have you ever read Robinson's book, where it is introduced that he has no water to drink, but there is clear water next to him, but he just doesn't drink it, because he knows that drinking sea water will kill people.

Untreated water cannot be drunk directly, because it contains many impurities, such as magnesium impurities contained in it, which will feel that the sea water is bitter, and many impurities in it are harmful to the human body.

It cannot be drunk without treatment.

It's an eye-opener! Why can't seawater be drunk directly? Someone experimented with the answer.

I don't think so! Do you think you won't be thirsty if you drink salt water when you're thirsty?

Seawater contains a large number of salts and a variety of elements, many of which are needed by the human body. However, the concentration of various substances in seawater is too high, far exceeding the drinking water health standard, if a large amount of drinking, it will lead to excessive entry of certain elements into the human body, affecting the normal physiological function of the human body, and serious poisoning.

If you drink seawater, you can take a lot of fresh water to remedy it. Large amounts of fresh water can dilute the excessive intake of minerals and elements by the body, excreting them from the body through sweat.

According to statistics, among those who died at sea, the mortality rate of those who drank seawater was 12 times higher than that of those who did not. Why is that? It turns out that the human body has to excrete about 150 grams of water in order to excrete 100 grams of salts contained in seawater.

Therefore, people who drink seawater not only cannot replenish the water that the human body needs, but also accelerate dehydration, and eventually cause death.

Seawater is drinkable after desalination. There are dozens of methods of seawater desalination, the most important ones are distillation, electroosmosis, freezing, membrane separation, etc. Distillation is the most widely used method nowadays, which is to heat and boil water to produce steam in seawater, and then condense the steam to become distilled water.

It is best to mix a small amount of (2) clean seawater or an appropriate amount of mineralizer into the fresh water prepared by distillation, so that the water tastes delicious, and also supplements the inorganic salts that are lacking in distilled water and necessary for the human body.

In special circumstances such as distress and life-saving at sea, in order to save fresh water, part of the seawater can be mixed with fresh water for drinking. Some people have done experiments that people drink a mixture of seawater and freshwater for a short period of time, which is generally harmless to the human body.

Because the body can't stand the high salinity.

It is generally known that sea water is very salty, and 1 gram of sea water contains 35 grams of salt. Our body excretes water into urine or sweat through the kidneys, and healthy kidneys excrete no more than 2% of salt, and seawater contains as much salt as high, and the kidneys cannot afford such a high concentration.

If you drink seawater, you will only get thirstier and thirstier the more you drink, and you need to supplement a lot of fresh water to dilute the seawater in your body, otherwise it will cause poisoning and even life-threatening.

As you all know, you can go three days without eating, but you can't go without drinking water for three days, but why not drink seawater.

The reasons are as follows: Pick up the barrel and go to the shallow sea area to pour some water, using the distillation method, so that the distilled water can be drunk, when the distiller is opened, it is found that the inner wall of the still is all white, looking like table salt, in fact, it not only contains sulfate, but also contains metal substances that are harmful to the human body, so if you directly quote seawater, not only can not play a thirst-quenching effect, but also will accelerate the loss of water in the body.

The question of whether seawater can be drunk as a last resort is currently being debated. Some people believe that the salinity of seawater is four times higher than the salt content of the human body, and drinking seawater will increase the total osmotic pressure in the body, although it can quench thirst temporarily, but soon it will urinate profusely, causing a large loss of water in the body. However, there are also many people who believe that a small amount of seawater in a short period of time will help prolong life.

Some people experimented, from the first day of falling into the sea, drink 50 ml of hidden meditation every hour and a half, only drink 500 ml a day, drink 4 or 5 days later, and then drink fresh water, as a result, the metabolism in the experimenter's body quickly returned to normal.

The French Dr. Aqin, known as the "role model of the navy", said with Nalan Bombal: "If you have fresh water, add seawater to extend your water supply time under strict control of the proportion; If you don't have fresh water, drink seawater to save your life until you can get rain, get a fish to squeeze into juice, or wait until the lifeboat arrives. "Alain Bangbar is not advocating drinking seawater, but emphasizing that it should only be drunk under strict control in life-and-death emergencies.

Alain Bombal's experience is a 2:1 ratio, that is, drinking two parts fresh water and one part seawater, which generally does not harm the human body, but greatly prolongs the life of the shipwrecked at sea. Because only when you have time can you gather the strength to fish and collect rainwater, to continue sailing and to signal the rescue boats.

In his recent writings, Briet Ori, a well-known French naval physician, wrote: "The victim can drink a small amount of seawater, up to 800 900 milliliters a day, and do not drink it again when the convulsions are completely dehydrated." "In the Second World War, there were three wrecked sailors, drifting in the Black Sea, they drank seawater to quench their thirst, one of them drank for 34 days in a row, he could only moisten his throat with bitter and astringent seawater for the first two days, and then he drank one or two sips, and on the third day, he was so thirsty that he drank a lot of it, and drank about 2,000 milliliters in one day and night, however, he survived.

It seems that drinking seawater in small quantities is also an emergency solution in the absence of fresh water.

Seawater cannot be drunk because it is not only salty and bitter, but also harmful to the human body.

On the one hand, the concentration of various substances in seawater exceeds the sanitary standard for drinking water, and if it is drunk in large quantities, it will cause symptoms such as dehydration, diarrhea and even poisoning, affecting the normal physiological functions of the human body.

On the other hand, the tissue fluid and cells of the human body contain table salt, which is a component of sodium chloride. Under normal circumstances, the intracellular solution and the extracellular plasma must be maintained at a certain concentration. The salt content in seawater is more than three times that of the human body, and if a person drinks seawater, the salt content in the body will increase.

In order to achieve an equal concentration inside and outside the cell, water will seep out of the cell, causing the cell to be dehydrated. So seawater is not drinkable.

The reason for the saltiness of the seawater.

The reason why seawater is salty is because there is about salt in seawater, so seawater is called the "hometown" of salt, and seawater contains various salts, of which about 90% is sodium chloride, which is the salt that we can't do without every day.

In addition, it also contains magnesium chloride, magnesium sulfate, magnesium carbonate and other salts containing potassium, iodine, sodium, bromine and other elements, among which magnesium chloride is the main component of the brine used for tofu, and magnesium chloride is commonly known as bitter brine, and the taste is bitter, therefore, the seawater with a large proportion of salt is salty and bitter to drink.