| Removal of Mercury (II) from Water Utilizing a Polymer–Organic Framework Composite Adsorbent |
| کد مقاله : 1372-ICOC |
| نویسندگان |
|
فاطمه امامعلی سبزی *1، محمد قلعه اسدی2، حسن ولی زاده2، حسین عبدالمحمدزاده2 1دانشگاه شهید مدنی آذربایجان 2دانشگاه شهید مدنی تبریز |
| چکیده مقاله |
| The removal of mercury (II) from wastewater is a significant environmental problem owing to its considerable toxicity, mobility, and the existence of competing ions [1, 2]. Traditional remediation methods, such as co-precipitation, membrane filtration, biological treatment, and ion exchange, frequently exhibit limited selectivity, fouling problems, and diminished efficacy at low metal concentrations [3]. To address these limitations, a COF-based hybrid adsorbent (P.M.C) was synthesized by integrating polymeric functionalities with an organic framework on mesoporous silica. Structural analyses confirmed the formation of a hierarchical, amine-rich composite with preserved mesoporosity and enhanced interfacial properties. Batch adsorption studies revealed that P.M.C exhibits an exceptionally high Hg²⁺ adsorption capacity (1058.41 mg g⁻¹) with rapid pseudo-second-order kinetics. The adsorption behavior follows both Langmuir and Freundlich isotherms, indicating monolayer adsorption on a heterogeneous surface. P.M.C shows excellent performance at near-neutral pH, maintains over 80% of its capacity after regeneration, and achieves more than 99% Hg²⁺ removal in industrial effluent due to strong coordination with nitrogen- and phosphorus-containing functional sites. |
| کلیدواژه ها |
| Covalent organic framework, selectivite adsorption, heavy metal ions, mercury remediation, Water purification |
| وضعیت: پذیرفته شده |