using from revers osmosis filtration, nano filtration can be a solution.

https://www.sciencedirect.com/search?qs=remove%20excess%20sodium%20from%20potable%20water&show=25&sortBy=relevance

Dear Saha,

There are some techniques to remove sodium from water. Such as,

Reverse osmosis: In a reverse osmosis filtration system, water flows through a membrane, filtering out some of the molecules within the water, including sodium.

Distillation: A distillation water treatment system uses temperature change to evaporate and recondense clean water. Inorganic minerals, such as sodium, do not usually transfer into the condensed water, but some organic contaminants will.

For the portable water, RO filters are recommended.

As many suggested, RO (reverse osmosis membranes) or Distillation is generally good solutions for high sodium levels (such as seawater).

Sudip Saha By the way, what is the level you observing? is it high as seawater or slightly higher than the consumable levels?

there are several reasons of getting higher levels of sodium

a. Seawater intrusion or mineral deposits. (then RO or modifications in raw water would do the solution: remember in some cases raw water source management strategies are cost effective then applying new treatment technology).

b. Addition of chemical in various treatment processes can be another reason for getting higher levels of sodium (in this case the levels are not as high as Seawater). One example is domestic water softeners (use sodium salts to remove hardness).

Typical values associated with sodium in potable water:

Typical tap water: less than 20 mg/L (however, this could go up to 500 mg/L based on the raw water source and treatment methods).

Typical domestic softeners could provide water around 300 mg/L stadium.

If possible pleas share your values and background information.

Good question......i suggest that reverse osmosis membrane or distillation is generally used a good solution for high sodium concentration.

RO and distillation (desalination), but distillation is expensive.

Reverse Osmosis as suggested by others!!

Sudip Saha : What is the scale of treatment? (is it large scale water treatment, small scale or household type?

if it is household type, solar distillation works and it is cheaper option.

Good contributions

Dear Sudip Saha

You can use modern techniques for water treatment such as: membrane distillation ,membrane filtration utilising modified fibres.

Regards

Good question I will follow answer

Apart from reverse osmosis and distillation, you can use electromagnetic field but it will not totally remove it but it will be reduced below the required standard.

Following answer

Dear Sir Dr. Amila,

Good evening. It is slightly higher than the consumable levels.

With best regards,

Sincerely

Sudip Saha

Sudip Saha , It looks like small scale water supply system or household type.

Best recommendation is to use RO system. However, special care has to be taken during rainy season due to high turbidity would damage the RO system. if it is household type (there are household type RO systems which is not that expensive).

However, in case you need alternative option. Since your water quality is slightly over the consumable level, I can recommend you water blending. There are several methods.

A. Blend (mix your slightly high sodium level water with tap water so the consumable volume increase).

B. In case there is no available source to blend, then you can use solar distillation and produce "Sodium free water" then mix that water with your original water. then you can get healthy water for human consumption. (blending ration can be decided based on the Sodium levels of water and the drinking requirements).

(my answer is based on assumptions that you can not alter the source water quality, an there are no issues other than high sodium level with your water).

Thank you, Sir Dr. Amila.

Sincerely

Sudip Saha

The simplest is to use activated carbon in sizes of 6 * 12 meshes and columns.

Valuable contribution.....

Reverse osmosis: In a reverse osmosis filtration system, water flows through a membrane, filtering out some of the molecules within the water, including sodium and chloride. These molecules, plus some water, are flushed into your home’s wastewater system. The treated water is stored in a small storage tank until needed. This system can be installed at the point-of-use, such as at the kitchen sink, or could be used to treat the water for your whole house.

Distillation: A distillation water treatment system uses temperature change to evaporate and recondense clean water. Inorganic minerals, such as such as sodium and chloride, do not usually transfer into the condensed water, but some organic contaminants will. These systems are installed either under the sink or counter and can increase a home’s energy costs.

Deionization: Similar to a water softener, in a deionization system water, is filtered through a resin, but acids and bases are used rather than salt to regenerate the system. While it is effective, there are some hazardous chemicals required in running the system.

As all we know that sodiam 'Na' has Positive (+)charged in that case we may use anion flocculants which contains Negative Charge ( - ). Bonding may be occured and after that sedimention will occured in clerifair and then use Active carbon filter to filter the water.

Interesting.....

Valuable as well attracting contribution.