A high‐efficiency adsorbent resin treated by nanosecond pulsed discharge for the removal of trace heavy metal ions in water

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In this paper, a high‐efficiency adsorbent resin is prepared by nanosecond pulsed discharge plasma to remove Cu(II), Pb(II), and Cd(II). The effects of discharge parameters, pH, and adsorbent dose on adsorption capacity of resins are evaluated. Correspondingly, the pore structure and chemical groups are analyzed using scanning electron microscopy, N2 adsorption–desorption, and X‐ray photoelectron spectroscopy. The equilibrium adsorption capacity of modified resins for Cu(II), Pb(II), and Cd(II) can reach up to 6.84, 10.87, and 9.22 mg/g, respectively, which is increased by 62%, 49%, and 48% compared with that of the raw. The improvement of adsorption capacity is attributed to the enhancement of specific surface area and mesopores number, as well as the generation of plentiful amino and O‐containing functional groups.