Synthesis and characterization of modified resorcinol formaldehyde aerogel as a novel absorbent to removing oxytetracycline from aqueuos solution

In recent years, concerns about the presence of drug compounds as part of emerging pollutants have been growing. In this study, we tried to make aerogels with a high specific surface area and use them to remove the antibiotic oxytetracycline. Similarly, the resorcinol formaldehyde organic aerogel was synthesized using the sol-gel method and ambient drying. The synthesized RF aerogel was modified by the incorporation of 1 wt.% of amine-functionalized graphene oxide (GOA) and Meta-phenylenediamine during the synthesis process to prepare RF-GOA1 and RF-PmPDA1., and finally the performance of all three samples as adsorbents under different parameters such as pH solution, initial concentation of antiobiotic, adsorbent dose and different contact times adsorbent with antibiotics was investigated. FTIR, RAMAN, XRD, FESEM, BET, CHN, EDS tests were used to characterize the samples and then the performance efficiency of the samples oxytetracycline antibiotic remove was investigated using UV-Vis spectroscopic test. The results of BET test showed that the highest specific surface area is related to RF aerogel containing 1 wt.% amine-functionalized GO (RF-GOA1) with 266 m2/g. Also, according to the results, the adsorption capacity in aerogel samples was RF, RF-GOA and RF-PmPDA1 were 386.6, 257.6 and 277.8 mg / g, and the removal rate of oxytetracycline was 51.5 ,77.3 and 70.1% obtained, respectively.