Synthesis and characterization of modified resorcinol formaldehyde aerogel as a novel absorbent to remove oxytetracycline and chlortetracycline antibiotics from wastewater

Behzadi, Alireza; Motlagh, Ghodratollah Hashemi; Ghomi, Erfan Rezvani; Neisiany, Rasoul Esmaeely; Jafari, Iman; Chinnappan, Amutha; Khosravi, Fatemeh; Ramakrishna, Seeram

doi:10.1007/s00289-021-03812-9

Cited by 7 publications

(14 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The broad peak in the all samples in the range of 3400 to 3430 cm −1 was related to hydroxyl functional groups in benzene ring. [ 43 ] Between 2856 and 2930 cm −1 , the observed peaks were due to symmetric tensile vibrations of CH 2 and hydroxyl groups, respectively. [ 49,50 ] The wavenumber range between 1216 and 1220 cm −1 was CN stretch bond of aliphatic amines [ 51 ] in RF‐PmPDA1, at R/C = 300, 400, and 600 was confirmed.…”

Section: Resultsmentioning

confidence: 99%

“…Accordingly, we concluded that in the modified samples, nitrogen atoms were formed on the surface of RF aerogel. [ 43 ]…”

Section: Resultsmentioning

confidence: 99%

“…Accordingly, we concluded that in the modified samples, nitrogen atoms were formed on the surface of RF aerogel. [43] One of the mechanisms in antibiotic adsorption using aerogels is hydrogen bonding between aerogels and antibiotics. All samples had the same percentage of nitrogen element and to determine which samples were more likely to form hydrogen bonds, one can compare them with oxygen and hydrogen elements.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…The adsorption isotherms explained a relationship between the equilibrium adsorption in the solid phase (q e ) and the equilibrium concentration of adsorption in a liquid phase (C e ) at constant temperature and have crucial role in adsorption process design. [43] The obtained data were processed using classic Langmuir and Freundlich models to explain the adsorption equilibrium (Figure 9). The equations these models are as follows [68] :…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…The adsorption isotherms explained a relationship between the equilibrium adsorption in the solid phase ( q e ) and the equilibrium concentration of adsorption in a liquid phase ( C e ) at constant temperature and have crucial role in adsorption process design. [ 43 ] The obtained data were processed using classic Langmuir and Freundlich models to explain the adsorption equilibrium (Figure 9). The equations these models are as follows [ 68 ] :

\frac{C_{normale}}{q_{normale}} goodbreak= \frac{C_{normale}}{q_{normalm}} goodbreak+ \frac{1}{k_{L} q_{m}}

Ln q_{e} goodbreak= Ln k_{F} goodbreak+ \frac{1}{n} Ln C_{e}

where

q_{m}

(mg g −1 ), 𝑛, k L, and k F are theoretical maximum adsorption capacity per unit weight of adsorbent, Freundlich linearity index, adsorption constants of Langmuir, and Freundlich models, respectively.…”

Section: Antibiotic Removal Performancementioning

confidence: 99%

See 4 more Smart Citations

Rational design of in‐situ‐modified resorcinol formaldehyde aerogels for removing chlortetracycline antibiotics from aqueous solutions

Behzadi

Motlagh

Raef

et al. 2022

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

Organic resorcinol formaldehyde aerogels with distinct pore sizes/surface areas in different ratios of (resorcinol/catalyst) R/C = 300, 400, 600 and (resorcinol/water) R/W = 2 were prepared utilizing sol–gel technique and in‐situ modified by incorporating 1 wt% meta‐phenylenediamine. The porous nanostructure, surface area, and pore size of the aerogels were characterized by scanning electron microscopy, Brunauer–Emmett–Teller, and Barrett–Joyner–Halenda techniques. Raman spectroscopy, Fourier transform infrared spectroscopy, and X‐ray diffraction were employed to get understanding into the chemical structure. Furthermore, we investigated the removal percentage of antibiotic via UV–vis spectroscopy. The ability of modified aerogels in removing chlortetracycline (CTC) at different pH values (2–12), contact times (2–24 h), initial concentrations of CTC (50–100 mg L−1), and the adsorbent dose (2–10 mg) was evaluated. Consequently, the adsorption optimum conditions were found, the adsorption isotherms were measured, and isotherm models were fitted to the results to interpret the kinetics of adsorption. The obtained fitting parameters using the pseudo‐second‐order model revealed a well alignment with the experimental data. Finally, we demonstrated that the modified‐aerogels have a high capacity in CTC antibiotics removal up to 90% and an adsorption capacity of 440 mg g−1 as well as an efficient regeneration capacity for five consecutive cycles without significant degradation of the adsorption properties.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Accordingly, we concluded that in the modified samples, nitrogen atoms were formed on the surface of RF aerogel. [ 43 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Adsorption Experimentsmentioning

confidence: 99%

Section: Adsorption Isothermmentioning

confidence: 99%

“…The adsorption isotherms explained a relationship between the equilibrium adsorption in the solid phase ( q e ) and the equilibrium concentration of adsorption in a liquid phase ( C e ) at constant temperature and have crucial role in adsorption process design. [ 43 ] The obtained data were processed using classic Langmuir and Freundlich models to explain the adsorption equilibrium (Figure 9). The equations these models are as follows [ 68 ] :