| firma: | Research Institute of Creative Education |
| tytuł: | Synthesis and modification of graphene oxide surface to remove benzimidazole in pharmaceutical wastewater |
| autorzy: | 1. PHAN CHI MAI 2. PHAN QUY VU 3. THAN BACH DIEU 4. NGUYEN VU HUNG ANH 5. NGUYEN NHAT QUANG |
| branża: | Młodzi wynalazcy |
| opis: | The common discharge of 1,2-aminoazophenylene (1,2-AAP), considered a hazardous class and an emerging organic compound (EOC), into municipal wastewaters has caused serious environmental issues that necessitate it urgent removal. This work developed an easily recoverable nanohybrid [γ-APTES]-Fe3O4@PAN@AC through in situ two-step process via co-precipitation of Fe3O4@PAN magnetic-polymer. Then, Fe3O4@PAN particulates were cross-coupled with activated carbon (AC) inside the framework of [γ-APTES]-soluble polymerization. The maximum monolayer adsorption capacity (Qmax, 303.2 mg g-1) occurred at pH 7, a desired temperature (50 °C), and equilibrium time after 6 h. Additionally, the desorption of 1,2-AAP from adsorbent was examined to enumerate the critical reusability of the sample. [γ-APTES]-Fe3O4@PAN@AC was able to reuse at least five cycles by simple ethanol washing. Investigation of the adsorption equilibrium under various conditions suggested several plausible interaction mechanisms, included ion exchange, hydrogen bonding, hydrophobicity, dipole force, electrostatic interaction and π-bonding, which were attributed to the binding affinity of the adsorbent-adsorbate interaction. The newly determined adjacent distance of 0.32 nm was well-associated with the (220) parallel plane of the Fe3O4@PAN regular sub-lattice active site, which encouraged the strongly chemisorbed interaction of 1,2-AAP, and was thus assigned to [γ-APTES]-Fe3O4@PAN@AC surface stability, which synergistically increased the adsorption capacities. |
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