A novel sulfide-modified nanoscale zero valent iron supported on porous anion exchange resin composite for Cr(VI) effective removal from waste

D201@S-nZVI was synthesized to remove Cr(VI) from aqueous solution. Batch experiments demonstrate it has excellent removal performance, recycling performance and longevity. Its removal efficiency and maximum adsorption capacity reaches 89.67% and 137.35 mg·g −1 for 100 mg·L −1 Cr(VI) solution, respectively. This is because S-nZVI (nZVI@FeS x ) has a core-shell structure. The FeS x layer prevents the leaching of iron and has excellent reduction and electron transport capability. In addition, the functional groups of D201 can electrostatically attract Cr(VI), and its unique skeleton structure well disperses S-nZVI. The adsorption is a spontaneous exothermic process. This research provides an effective remediation material for Cr(VI) wastewater.