Marine harmful algae bloom (HAB) is a growing threat to desalination plants worldwide. This work proposes ferrous iron/peroxymonosulfate (Fe/PMS) as a novel pretreatment technology for seawater reverse osmosis (SWRO) under HAB. Herein, Fe/PMS achieved a significantly higher reduction of negative charge of algae-laden seawater as compared to conventional coagulation (i.
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