How do you get clean water from water with salt?

Answer 1

filters are available in different pore sizes. therefore we can use appropriate pore size filter to separatesalt from salt solution. this type of filteration is called ultrafiltration, nanofilteration. reverse osmosis , a kind of filteration under pressure , is also used.

Answer 2

There are a number of ways to remove salts from water:

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1. Distillation. The salt water is repeatedly evaporated and condensed in a "reflux" condenser.

At some point, determined by the design, the condensed water in the reflux condenser is tapped

off. If the condenser is sufficiently efficient (that's easy in the case of inorganic salts)

the water is very pure (distilled water).

2. Sequential freezing. Here salty water flows over a rotating drum that is cooled below the

freezing point of water. Some of the salty water freezes out on the drum. Water has a rather

complicated crystal structure that prevents inclusions of most salts in the crystal lattice.

So pure water crystallizes out on the drum. There are a number of mechanical/chemical devices

to rinse off the layer of pure water ice that forms. This category of purification is used

in restaurants and bars. In such establishments you will see that the ice cubes are crystal

clear with no inclusions of air like you observe in home-made ice cubes. In addition to the

salts, dissolved gases are removed from the water. The process is very efficient for water that is not too

salty.

3. Reverse osmosis. If one separates salty water and pure water by a membrane that allows

water to pass through it (but not any of the dissolved ions) the natural course of events

is that water from the "pure" water side will diffuse through the membrane to dilute the

salty water. This transport comes to equilibrium when the salt concentration on both sides

of the membrane is the same. This process is called osmosis. In reverse osmosis a high

pressure is applied the salty side of the water separated by the membrane that will allow

water to pass, but not the ions. If the pressure is high enough the water is "squeezed" out

of the salty side into the pure water side. The pressures required are rather high and the

membranes are usually not 100% efficient, so in commercial systems there are some engineering

design problems to make the membrane sufficiently mechanically strong to withstand the

pressure difference across the membrane, and a series of membranes may be required to

improve the overall efficiency.

4. There are certain polymeric filters that exchange H(+1) ions for cationic ions M(+n)

and OH(-1) ions for anionic ions A(-m). These remove the salts for H(+1) and OH(-1). Of

course, here one may need to be concerned about the final pH of the effluent water. I do

not think that this method is widely used.

Answer 3

You can use a purification system. you can put the saltwater in a 2 literbottle and put a tube on top where the cap goes and you attach another literbottle but on a higher place. you heat up your 2 litterbottle that has saltwater it should evaporize and then it condenses back into liquid and falls into your other bottle. The salt should stay in the first litterbottle. Hard to explain i wish i was able to draw a picture When salt water is boiled, all the salt will crystallize at the bottom of the container and water will evaporate from the container.

Collect the condensation, and you have salt-free water.

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Or in two words: "distil it"!

Answer 4

It is very easy to purify/filter your water. Just either buy a water filter jug and cartridge or water purifying tablets, or, if you want do it the old fashioned way, boil the water which gets rid of any harmful things.

Answer 5

You could filter sea water by heating it up and then letting it cool leaving you with salt, or if you wanted to filter the elements you can use electrolysis, this means you send electricity through the sea water and separate it into oxygen, hydrogen and chlorine, hope this helps

Answer 6

The cheapest (but more complex) way is to use reverse osmosis, which produces two water streams... one with less salt, and one very concentrated in salt (perhaps toxically so) and "floaties" that need treatment.

A more expensive (but simpler) way is evaporation, which leaves the salt behind (and usually kills the "floaties"). Also called distillation.

• Water systems on craft that spend a long time at sea, pull sea water to cool a small engine, whose job is to pull a vacuum on its own water jacket and pressurize the exit water back into the ocean. This vacuum lowers the water's boiling point, taking a bit less energy (and temperature) to start boiling. The entire water stream is not boiled away, as this would coat the engine's internals with very hard scale, reducing engine life and effectiveness in a matter of hours.

Another way is to use mixed bed deionization, or just one bed each of cation and anion exchange resin. For small amounts of water (and low salt levels), this can be inexpensive. These columns can be regenerated, and there are companies that do this by service exchanging regenerated vessels for exhausted ones.

I can not think of a way but u can get salt from salt water by evaporating the water because only the liquids will evaporate and salt is a solid not a liquid. Sorry I could not be of more help. BBW

Answer 7

No , because the salt dissolves easily you have to evaporate it !

Answer 8

Yes!!! If you boil the water enough, the salt will stick to the pan, and then you'll have distilled clean fresh water.

Answer 9

salt in the water can be reomved by reverse osmosis. In reverse osmosis, solvent is flown from the solution

Answer 10

A bit but definitely not all you need to evaporate the water to get the salt out