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In present research a powerful adsorbent was fabricated and employed for removal of anionic reactive dye, Reactive Black 5 (RB5) from aqueous solutions. Polyethylenimine (PEI)–polyvinyl chloride (PVC) composite fiber was prepared by spinning PEI–PVC blend into the mixture of water and methanol. To evaluate the dye sorption performance of PEI–PVC fiber, various parameters that included the effect of...