| abstract |
Methods and systems are provided for removing ions from aqueous fluids. In certain embodiments, the present disclosure provides a method of removing one or more oxyanions from an aqueous fluid, the method comprising the steps of contacting an aqueous fluid comprising an oxyanion with aluminum metal, whereby aluminum ions are released from the aluminum metal into the aqueous fluid, wherein one or more oxyanions in the aqueous fluid react with the aluminum ions to form one or more ettringites; controlling the aluminum ions rate of release from the aluminum metal; and removal of at least a portion of the precipitated ettringite from the aqueous fluid. |