I wanted to separate copper sulfate from water. My compound is also soluble in water. I've tried with filtration and other method like reverse phase column chromatography, But still I didn't find any solution for that.
As to separate Copper Sulphate from water, it is better to try crystallisation and evaporation processes. The detailed processes are well known and easily available in text books. Also available on line.
This is the procedure for the process indicated by Virendra:
Firstly we have to heat the CuSO4 solution to a saturated solution (about 3/4 of the water has vaporised). Then leave the solution in a beaker to cool it. When the solution is let to cool down, crystallization will occur. Normally we left it to form the crystals for 3 days. When you cool it, be sure to cover the solution so that no impurities will go inside. After that, filter the crystal out. Then put it on a dry filter paper and let it dry. The salt formed is blue in colour which is not a copper (2) sulphate salt. It is still hydrated (CuSO4.5H2O). To form the salt which is white in colour, you need to heat the hydrated CuSO4.5H2O salt strongly. CuSO4.5H2O --> CuSO4 + 5H2O
You may also consider ion exchange. First pass your material through a cation exchange resin to remove the copper, then an anion resin to remove the sulfate.
For fast crystallization, you can create some inter-phase by seeding with small crystal of copper sulfate or put a glass rod inside the solution. As mentioned by Rafik Karaman, the crystals obtained will be hydrated copper sulfate, so you have to heat it to obtain anhydrous copper sulfate.