What does salt in seawater do? What salt is in seawater

The most important thing about the salt in seawater is to maintain the same concentration as the epithelial cell fluid in the fish, so that the fish will not be dehydrated or swelled by absorbing water and dying.

For the fish, think about it, you also eat salt!

Seawater contains sea salt, and the reasons why seawater contains salt:

1. The origin of seawater salinity is a complex issue, which is related to the origin of the earth and the formation and evolution of the ocean. In general, the brightness gap is believed to be mainly due to the weathering products of crustal rocks and soluble compounds ejected from submarine volcanoes.

2. In addition, the world's rivers transport dissolved salt to the ocean every year, which is also one of the most salty salts in seawater.

3. Some of the salt comes from volcanoes on the ocean floor, but most of it comes from the deficit rocks of the earth's crust. The rocks are weathered and disintegrate, releasing salts, which are then carried to the sea by the river.

Seawater contains sea salt, and the reasons why seawater contains salt:

1. The origin of seawater salinity is a complex problem, which is related to the origin of the earth, the formation and evolution of the ocean. It is generally believed that the salt is mainly from the weathering products of crustal rocks and soluble compounds ejected from submarine volcanoes.

2. In addition, the world's rivers transport dissolved salt to the ocean every year, which is also one of the salts of seawater.

3. Some of the salt comes from volcanoes at the bottom of the sea, but most of it comes from rocks in the earth's crust. The rocks are weathered and disintegrate, releasing salts, which are then carried to the sea by the river.

Core efficacyAnti-inflammatory, anti-bacterial, improve sleep, improve skin texture.

An introduction to sea brineSea salt water is a solution of sea salt and water. Sea salt is a salt made from seawater (in the north, underground brine) is used. Seawater enters the evaporation pond through the tide, is evaporated and concentrated into saturated brine by solar evaporation, and continues to evaporate and crystallize in the crystallization pond, and then collects salt manually or mechanically, and piles up to complete production.

Sea salt has a low sodium chloride content, contains a variety of trace elements required by the human body, and does not add any anti-caking agents.

Efficacy and function1. Anti-inflammatory and sterilization: Sea salt water has the effect of anti-inflammatory and sterilization, and you can wash your nose with sea salt water, as well as sensitive places such as around the eyes and navel. If there are small wounds, mouth ulcers, you can also use normal sea saline.

2. Improve sleep: Sea salt is a hypnotic agent that can promote the body's sleep and improve the quality of sleep.

3. Improve skin texture: There are microorganisms in unrefined sea salt, and bathing with sea salt water can help improve the quality of the skin by increasing blood circulation and increasing the flow of nutrients to the world.

Suitable forSuitable for the general population.

ContraindicatedThere are no special contraindications.

It is not advisable to eat togetherThere are no special contraindications to eating together.

The salt in seawater mainly comes from the following aspects:

1.Dissolution of the earth's crust: The rocks and soils on the earth contain a wide variety of minerals that can be released into water bodies through the process of weathering and erosion.

When precipitation and underground cave water come into contact with rocks, they dissolve the mineral residues in the rocks and carry them into rivers and lakes and eventually into the ocean.

2.Groundwater and subsurface veins: Groundwater and groundwater veins on Earth also contain dissolved minerals. When groundwater flows through formations containing soluble rocks and salt deposits, they dissolve the salts in them and transport them to the ocean.

3.Volcanic activity: Volcanic activity carries minerals and molten magma deep underground to the surface and flows into the ocean via rivers. These lava and minerals also contain large amounts of salts.

4.Submarine fountains: Submarine fountains are solutions of water and minerals spewed from hydrothermal vents in the earth's crust. These hydrothermal fluids, which are rich in metallic elements and salts, are released into the ocean through submarine fountains.

Over time, these ** flood into the ocean and accumulate, causing the salt concentration in the sea to gradually increase. It is worth noting that the salt in seawater is a complex mixture of various ions, mainly including chloride ions, sodium ions, magnesium ions, calcium ions, sulfate ions, etc.

This is produced by drying salt, that is, the sea water is evaporated by basking in the sun, and the salt crystallizes out, which becomes sea salt.

Causes of sea salt.

The vast oceans cover 70% of the Earth's surface area, and the seawater in the oceans accounts for 97% of the total weight of the Earth's waters. The total salinity in seawater is Baumé, i.e. 1 The salt content in seawater is 35 grams.

There are different theories as to why the ocean contains so much salt, but there are two reasons for this:

The first is "a hundred rivers return to the sea". On land, large and small rivers dissolve a certain amount of salt, and the rivers flow into the sea endlessly. According to some data, the amount of water flowing into the sea every year accounts for about 14,500 of the entire seawater, and after tens of millions of years, the water continues to evaporate, inject, and recycle, while the salt accumulates, constituting a certain salt content of today's seawater.

The second is "volcanic eruptions". Oceanographic research has proved that there are far more submarine volcanoes than terrestrial volcanoes, and the volcanic ejecta contains soluble compounds, and its chemical composition is similar to that of salts in seawater, so there are salts dissolved in seawater when the ocean is formed.

Production of sea salt.

Sea salt, salt made from seawater (including coastal underground brine) as raw materials. China is the earliest country in the world to develop sea salt, and there are good conditions for sea salt production.

China's sea salt production, generally using the sun drying method, also known as the "beach drying method", is the use of coastal mudflats, dam to open up salt pans, through the tide to raise water, attract seawater irrigation ponds, through the evaporation of sunlight into brine. When the brine concentration evaporates to 25 Baumé degrees, sodium chloride is precipitated, which is the raw salt. The production of raw salt by the sun drying method has the advantages of saving energy and low cost, but due to the influence of geography and climate, it is not possible to build salt pans in all coastal tidal flats and dry salt in all seasons.

The climate is dry, the sunshine is long, the evaporation is large, and the salt yield is high; Otherwise, the yield is low.

The process of producing raw salt by sun-drying method is generally divided into four major processes: moisture absorption, brine making, crystallization, and salt collection.

a.Tide Na is the use of tidal movement to extract raw materials for salt production when the high salinity of the sea water from the open sea is pushed offshore. At present, there are two kinds of tide acceptance methods, one is natural tide acceptance, and the other is power absorption.

Natural tidal acceptance is to allow seawater to flow naturally along the tidal channel at high tide; Axial flow pumps are generally used to bring in seawater, which is characterized by not being limited by natural conditions.

b.Brine production is carried out in a vast area of evaporation pond, according to the daily evaporation volume, properly grasp the depth of water in the evaporation pool, so that the brine concentration gradually increases, and finally concentrates into saturated brine.

c.Crystallization In the process of continuous evaporation and concentration of seawater, the concentration of various salts continues to increase, when the salt concentration reaches saturation, the salt is precipitated in the form of crystals, and the supersaturation of the solution is continuously maintained in the supersaturated solution, and the crystals can continue to grow.

d.Salt collection The grown salt is collected manually or mechanically.

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Kelp in the sea, which originally contained magnesium dichloride, sodium bromide and disodium sulfate, after burning. iodized salt can be generated. Add barium hydroxide to seawater to obtain insoluble white precipitate

Magnesium hydroxide and barium sulfate, and re-filtered. In the filtrate, sodium carbonate of Na2CO3 (prepared by looping) is added. Can be generated.

Barium carbonate precipitation. and. Chlorination.

It is then filtered and introduced with chlorine to produce liquid bromine, carbon dioxide and . Sodium chloride. Sodium chloride. After electrolysis.

It can also be generated. Elemental sodium na. and chlorine.

The pure salt produced can also be prepared as saturated salt water. Sodium hydroxide is obtained by electrolysis of saturated salt water, which can be used to absorb the carbon dioxide CO2 produced by the reaction between the added soda ash and acid (which can make carbon soda alkali) and make soda ash in a loop. Precipitate magnesium hydroxide and then add (usable) hydrochloric acid to obtain magnesium chloride, and then melt and electrolyze to obtain magnesium mg element and chlorine.