Application of reverse sulfide porous sulfur-rich copolymer in rapid mercury adsorption

Le résumé fourni par la source

The pore structure of S-Cy sulfur-rich copolymer was regulated by sodium bicarbonate as a pore-forming agent, and its performance in removing mercury ions(Hg2+) from wastewater was evaluated. In this study, cyclooctadiene was used as a crosslinking monomer to prepare a porous sulfur-rich polymer S-Cy-A by reverse vulcanization with sulfur powder. Compared with S-Cy without sodium bicarbonate, the specific surface area of S-Cy-A was significantly increased to 5.18 m2/g,which was 28 times that of S-Cy. The removal efficiency of Hg2+ by S-Cy-A reached 89.2% within 30 s, and the adsorption rate increased to 17.84 mg/min, which was 356.8 times that of S-Cy. In addition, the adsorption process conformed to the pseudo-first-order and pseudo-second-order kinetic models. XPS showed that Hg2+ was adsorbed on the surface of S-Cy-A in the form of HgS. When the pH of solution was 4, the adsorption performance of Hg2+ was the best. The adsorption selectivity of S-Cy-A for Hg2+ was proved by the experiment of multi-metal ion system.

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