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. 2023 Nov 13;8(47):44942–44954. doi: 10.1021/acsomega.3c06360

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© 2023 The Authors. Published by American Chemical Society

Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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(A) Surface enhanced Raman spectra (SERS) from water samples of moxifloxacin antibiotics (1000 ng/L) before filtration. SERS from water samples after filtration using the FGO-PEI based nanoplatform. (B) SERS from water samples of tetracycline antibiotics (1000 ng/L) before filtration. SERS from water samples after filtration using the FGO-PEI based nanoplatform. (C) Plot shows how the SERS intensity at 1620 cm^–1 for the C=C stretch from moxifloxacin antibiotics varies with the concentration (ng/L). I₀ is the SERS intensity at 1620 cm^–1 when the concentration is 1000 ng/L. I_f is the SERS intensity at 1620 cm^–1 when the concentration varies from 1000 ng/L to 5 pg/L. (D) Plot shows how the SERS intensity at 1230 cm^–1 for amide-III band from tetracycline antibiotics varies with the concentration (ng/L). I₀is the SERS intensity at 1230 cm^–1 when the concentration is 1000 ng/L. I_f is the SERS intensity at 1230 cm^–1 when the concentration varies from 1000 ng/L to 5 pg/L. (E) Tetracycline and moxifloxacin antibiotic removal efficiency from drinking water using theFGO-PEI based nanoplatform. For this experiment, we used 1000 ng/L of antibiotic infected drinking water. (F) Tetracycline and moxifloxacin antibiotic removal efficiency from drinking water using the GO-PEI based nanoplatform. For this experiment, we used 1000 ng/L of each antibiotic separately. (G) Tetracycline and moxifloxacin antibiotic removal efficiency from drinking water using the FGO based nanoplatform. For this experiment, we used 1000 ng/L of antibiotic infected drinking water. (H) Variation of moxifloxacin antibiotic removal efficiency with time for the FGO and FGO-PEI based nanoplatform. (I) Plot shows the variation of 1/q_e with 1/C_e for moxifloxacin antibiotics using the PEI-FGO adsorber, where q_e is the quantity of moxifloxacin antibiotics absorbed at equilibrium and C_e is the concentration of moxifloxacin antibiotics. (J) Moxifloxacin antibiotic removal efficiency from tap water, Mississippi river water, lake water, and drinking water using the FGO-PEI based nanoplatform. For this experiment, we used 1000 ng/L of moxifloxacin antibiotic infected water samples. (K) Tetracycline antibiotic removal efficiency from tap water, Mississippi river water, lake water, and drinking water using the FGO-PEI based nanoplatform. For this experiment, we used 1000 ng/L of tetracycline antibiotic infected water samples. (L) Removal efficiency of PFNA, PFBS, tetracycline, and moxifloxacin antibiotics simultaneously from tap water, Mississippi river water, lake water, and drinking water using the FGO-PEI based nanoplatform. For this experiment, we used 250 ng/L of perfluorobutanesulfonic acid (PFBS), 250 ng/L of PFNA, 250 ng/L of tetracycline, and 250 ng/L of moxifloxacin antibiotic infected water samples.