Abstract
Metal-organic frameworks (MOFs) and their derivatives have unparalleled potential in removing heavy metal ions from water. Herein, the synthesis and adsorption performance of porous materials derived from MOF derived (Sulfur@MOF) are described. Sulfur@MOF, which was prepared via a simple vulcanisation method, exhibited increased affinity for Hg(Ⅱ) ions owing to the successful introduction of sulfur. The adsorption capacity of Hg(Ⅱ) ions was studied by measuring the adsorption isotherms, adsorption kinetics and adsorption thermodynamics. Sulfur@MOF exhibited extremely high selectivity for Hg(Ⅱ) ions and could efficiently (99.9 %) capture Hg(Ⅱ) ions with an adsorption capacity of 1.2 g/g (ca. 120 min), reducing reducing pollutants with different concentrations from wastewater to drinking water standards. Moreover, Sulfur@MOF showed good reusability, with the removal rate after six cycles being greater than 95 %. Owing to its ultra-efficient removal ability and high adsorption capacity for Hg(Ⅱ) ions and good recyclability, Sulfur@MOF exhibits good application prospects as an adsorbent for pollutant removal.
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