Now, so many more questions:
So, they may be able to “filter” it leaving only Tritium. I’d say they’d better get cracking on that construction.
Doesn’t Japan own any supertankers? I’d think sacrificing one of those might be a small price to pay, compared to the alternative. It/they could be used for instant storage, to buy time to build some decent tanks, and for transportation of the less radioactive water to an appropriate Pacific release point.
Since they claim they can filter it, does that mean the radioactivity is not bonded to the water molecules? Would air-temperature evaporation allow water vapor to escape leaving the concentrated radioactive material behind?
Japan/TEPCO first looked to the United States to provide a ship to handle the water since we have large floating water buffaloes. I believe we turned them down. They do not have that capability.
As for evaporation. Indeed at nuclear power plants across the world scrubbing coolants is the go to choice. Of course that evaporation is not sun driven but more like a contained steamer.
However as the article eluded to Fukushima is small in actual area with way to much fission material and water on property. All existing scrubbing machinery has been lost to either the quake, flood, or the previous meltdowns. To install something now is honestly something that would require something just short of a miracle.