Treatment of cesium-containing fluids

Method of treating an oilfield well penetrating an earth formation comprising introducing into said well an oil well fluid containing cesium, whereby said fluid becomes diluted in or by said formation so that it contains less cesium in concentration, circulating said fluid from said well, and passing at least a portion of said fluid through a cavitation device to remove moisture therefrom and produce a regenerated fluid containing a higher concentration of cesium by weight in said fluid.

Method of achieving a desired crystallization temperature in a used oil well fluid containing cesium comprising passing said used oil well fluid through a cavitation device, thereby obtaining a rejuvenated oil well fluid having a concentration of cesium greater than that of said used oil well fluid, and adding at least one salt to said rejuvenated oil well fluid in an amount calculated to obtain a desired crystallization temperature in said rejuvenated oil well fluid.

Method of upgrading a cesium containing solution, said solution being obtained in a mining process and comprising less than 2.5% cesium by weight, comprising passing said cesium containing solution through a cavitation device to remove water therefrom, thereby obtaining a solution containing a concentration of cesium higher than 2.5% by weight.