Ternary cross-coupled nanohybrid for high-efficiency 1H-benzo[d]imidazole chemisorption

• Published in: Environmental science and pollution research international 2018-08, Vol.25 (22), p.21901-21914
• Main Authors: Minh, Tran Dinh, Lee, Byeong-Kyu
• Format: Article
• Language: English
• Subjects: Acrylic Resins - chemistry; Adsorbents; Adsorption; Aminopropyltriethoxysilane; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Benzimidazoles - chemistry; Chemisorption; Conjugation; Contaminants; Dipoles; Earth and Environmental Science; Ecotoxicology; Electrostatic properties; Endothermic reactions; Environment; Environmental Chemistry; Environmental Health; Environmental science; Graphite - chemistry; Hydrogen Bonding; Hydrogen bonds; Hydrogen-Ion Concentration; Hydrophobicity; Imidazole; Intersections; Ion exchange; Iron oxides; Lattices; Magnetic separation; Magnetics; Nanoparticles; Nanostructures - chemistry; Organic contaminants; Polyacrylonitrile; Polymers; Polymers - chemistry; Propylamines - chemistry; Research Article; Silanes - chemistry; Temperature; Waste Water Technology; Water Management; Water Pollutants, Chemical - chemistry; Water Pollutants, Chemical - isolation & purification; Water Pollution Control
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-018-2297-3

1H-Benzo[ d ]imidazole (BMA) has been considered as an emerging pharmaceutical organic contaminant, leading to the increasing BMA detection in wastewaters and need to be removed from ecosystem. This study investigated a highly synergistic BMA chemisorption using a novel ternary cross-coupled nanohybrid [γ-APTES]-Fe 3 O 4 @PAN@rGO. Magnetic nanoparticles (Fe 3 O 4 ) were in situ core-shell co-precipitated with polyacrylonitrile polymer (PAN). Then, the prepared Fe 3 O 4 @PAN was decorated on hexagonal arrays of reduced graphene oxide (rGO) inside the framework of γ-aminopropyltriethoxysilane ([γ-APTES]). The final nanohybrid [γ-APTES]-Fe 3 O 4 @PAN@rGO produced adjacent inter-fringe distances of 0.2–0.4 nm corresponded well to (111), (220), and (311) parallel sub-lattices with two oblique intersections at 90° right angle and 60° triangle. The BMA adsorption was favorable in neutral pH 7, aroused temperature (50 °C), and controlled by endothermic process. The identified maximum adsorption capacity of 221.73 mg g −1 was 30% higher than the reported adsorbents. The adsorption mechanisms include ion exchange, hydrogen bond, dipole-dipole force, π-conjugation, electrostatic, and hydrophobic interaction. Graphical abstract The synthetic route of novel nanohybrid [γ-APTES]-Fe 3 O 4 @PAN@rGO was investigated. After BMA adsorption, the adsorbent surface was entirely changed, thus an efficiently facile magnetic separation within 8s. [γ-APTES]-Fe 3 O 4 @PAN@rGO formed different oblique intersections of 60° and 90° sub-lattices