Welcome to the forum.

Very interesting water purification ideas, this is the first time I heard about these methods. But feel it may not be very practical in a survival situation. You may not have the energy / time to build or find the necessary materials. The situation may make it impossible for you to do it.

With the current state of technology, there is better solutions that is more effective and safe, eg. steripen & MSR MIOX purifier.

I had the MSR MIOX purifier and think it work great.