Most recently, polydopamine (PDA) and its hybrid nanomaterials have been developed as promising

adsorbents to remove organic dyes. However, PDA-based adsorbents are typically limited by a poor

alkali resistance, lack of selective adsorption capacity and unsatisfactory recyclability. Herein, novel PDAbased magnetic nanoparticles are fabricated for thefirst timeviathe simultaneous incorporation of PDA