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The potential of polypyrrole-coated Fe3O4 nanoparticles (Fe3O4@PPy NPs) for removal of two anionic dyes from aqueous solutions was studied. The dye removal process was affected by several parameters such as pH, sorbent amount, and contact time, and were optimized using the response surface methodology (RSM) based on orthogonal central composite design (OCCD). The maximum removal of dyes was achieved...
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