A porous high-sulfur polymer adsorbent (SOT) was synthesized via inverse vulcanization using sulfur,vegetable oil,and triallylamine as raw materials for the removal of Hg2+ from water.The materials were characterized by Fourier-transform infrared spectroscopy (FT-IR),scanning electron microscopy (SEM),thermogravimetric analysis (TG),X-ray diffraction (XRD),and Brunauer-Emmett-Teller (BET) specific surface area and pore size analysis.The adsorption performance was systematically investigated under key parameters including adsorbent dosage,solution pH,temperature,and initial Hg2+ concentration.Under optimal conditions (50 mg/L Hg2+,12 h,30℃,pH≈5),an adsorption efficiency exceeding 98% was achieved with an SOT dosage above 0.3 g.The adsorption,well-described by the Langmuir and pseudo-second-order models,indicates a monolayer chemical mechanism.Moreover,the SOT adsorbent exhibits a simple synthesis,low cost,wide operational pH (2-8) and temperature (30-50℃) ranges,and robust reusability (>50% efficiency after 5 cycles),demonstrating significant application potential for Hg2+ removal.
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