Iron Removal

Dear All I am designing a seawater filtration plant for water flooding project an a oil producing platform.  The influent iron contain of the source is in the range of 30 to 35 mg/l and we need to achieve a target of 1.5 ppm.  There is no RO membrane downstream and space is a big constraint on the platform.   I am hopeful that strong oxidants will do the trick.  But wanted to know your experience on this. Please suggest. Best Regards Anvar Mansuri