So far I know gypsum treatment will be more beneficial to reduce the salinity of both water or soil in low cost.

thanks Rakesh Prasad Bhagat are there any paper that you would recommend?

1. In most of the ore mining, Acid mine drainage is the major problem and salinity phenomenon very rare. Again this varies with the ore you are mining and type of mining process employed. I guess the mining area you mentioning is plain land and not a hill side.

2. If the problem is saline water, you can try Epavporation Ponds in which water is evaporated with help of sunlight and remaining salts can be collected and disposed safely.

3. In evaporation pond no need to add any additives regularly, which inturn reduce the treatment cost.

I agree with Balusamy Arumugam comment " Acid mine drainage (AMD) is the major problem and salinity phenomenon very rare".

I agree with Rakesh Prasad Bhagat gypsum treatment will be more beneficial to reduce the salinity at a lower cost.

for the water that we are dealing with, Ca - 3200 mg/L, Cl - 56000 mg/L, Na - 30000 mg/L, K - 6500 mg/L.

electrical conductivity 125000 μS/cm

TDS - 140000 mg/L

and the site has no fresh water source available. so we need to find a way to reduce the salinity level hence the water can be reused else where.

we can't evaporate water as water is extremely expensive to get. Reuse is the only option.

CSIRO is involved with a technology called Virtual Curtain (see http://www.virtualcurtain.com.au/).

Whether it will do everything you want I'm not so sure, but it does remove some salinity. While its obviously had applications in AMD, its gone much broader than that.

Feedback from the guy who established Virtual Curtain is that the water you describe is probably not a great candidate for that approach, unless there is also lots on Mg and even Si present as well.

thanks Phillip Donald Fawell i will take a look at it anyway

Valuable discussion