We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Adsorption of nitrophenol onto a novel Fe<sub>3</sub>O<sub>4</sub>-κ-carrageenan/MIL-125(Ti) composite: process optimization, isotherms, kinetics, and mechanism.
- Authors
Abd El-Monaem, Eman M.; Eltaweil, Abdelazeem S.; El-Subruiti, Gehan M.; Mohy-Eldin, Mohamed S.; Omer, Ahmed M.
- Abstract
Water pollution is a dreadful affair that has incessantly aggravated, exposing our planet to danger. In particular, the persistent nitro aromatic compound like nitrophenols causes anxiety to the researchers due to their hazardous impacts, excessive usage, and removal difficulty. For this purpose, a novel multi-featured composite was constructed based on κ-Carrageenan (κ-Carr), MOF (MIL-125(Ti)), and magnetic Fe3O4 for efficient adsorptive removal of o-nitrophenol (o-NP). Interestingly, BET measurements revealed the high surface area of Fe3O4-κ-Carr/MIL-125(Ti) of about 163.27 m2/g, while VSM showed its excellent magnetic property (20.34 emu/g). The comparison study pointed out the synergistic effect between Fe3O4, κ-Carr, and MIL-125(Ti), forming a composite with an excellent adsorption performance toward o-NP. The adsorption data obeyed pseudo-second-order kinetic model, and Freundlich isotherm model was better fitted than Langmuir and Temkin. Furthermore, Langmuir verified the supreme adsorption capacity of o-NP onto Fe3O4-κ-Carr/MIL-125(Ti) since the computed qmax reached 320.26 mg/g at pH 6 and 25 °C. Furthermore, the XPS results postulated that the adsorption mechanism pf o-NP proceeded via H-bonding, π-π interaction, and electron donor–acceptor interactions. Interestingly, Fe3O4-κ-Carr/MIL-125(Ti) composite retained good adsorption characteristics after reusing for five cycles, suggesting its viable applicability as an efficient, renewable, and easy-separable adsorbent for removing nitro aromatic pollutants.
- Subjects
PROCESS optimization; ADSORPTION (Chemistry); NITROPHENOLS; ADSORPTION capacity; NITRO compounds; ATMOSPHERIC temperature; CARRAGEENANS
- Publication
Environmental Science & Pollution Research, 2023, Vol 30, Issue 17, p49301
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-023-25678-2