The invention relates to a method for electrochemical preparation of
hydrotalcite for in-situ treatment on a
strontium-containing
radioactive waste liquid in a power
plant. The method comprises the following steps: preparing simulated radioactive
wastewater with Sr<2+> as
electrolyte, dropping an alkali solution and an acid solution, adjusting the pH value to be 5-11, and carrying out electrolysiswith double power supplies, wherein a direct-
current voltage stabilizing power supply with an aluminum piece as an
anode and
graphite as a
cathode is adopted as one group of the power supplies, and apulse power supply with two
zinc pieces as an
anode and a
cathode respectively is adopted as the other group of the power supplies; alternating the anodes and the cathodes through inverse electrodes,carrying out
electrolysis synthesis under a constant temperature condition, after the reaction is completed, leaving the
electrolyte to stand, filtering, and carrying out
solid-liquid separation, soas to complete
simulation waste liquid purification treatment. By adopting the method, a great amount of chemicals or absorbents are not needed, only
nitrate radicals and
chloride ions of certain concentrations in the waste liquid need to be controlled, no secondary
pollution can be caused, efficient removal of multiple
divalent radioactive metallic ions can be achieved, and the method only aims at removal of
strontium ions, is capable achieving efficient
solid-liquid separation, is wide in material resource, simple in process and convenient to operate.