@article{b036b01b73cf42caa4d55c6e98471ba6,
title = "Comprehensive evaluation of antibiotic tetracycline and oxytetracycline removal by Fe-metal organic framework/biopolymer-clay hydrogel",
abstract = "Tetracycline (TC) and oxytetracycline (OTC) are antibiotic compounds increasingly detected in various water sources. In this study, Fe-metal organic framework incorporated biopolymer-clay hydrogels (CAMIL-MMT and CAMIL-SEP) were prepared to remove TC and OTC from water. The physicochemical properties of the as-prepared hydrogels were thoroughly characterized, and the effect of various operating parameters on the adsorption performance was systematically examined. The CAMIL-MMT hydrogel showed the maximum adsorption capacity for TC and OTC (24.59 and 26.14 mg/g, respectively) compared to the CAMIL-SEP and other forms of biopolymer hydrogel precursors. The effects of the contact time and initial concentration on TC and OTC adsorption by CAMIL-MMT and CAMIL-SEP hydrogels were well suited to the pseudo-second-order kinetics and Freundlich isotherm models. The adsorption performance of CAMIL-MMT and CAMIL-SEP hydrogels slightly decreased with an increase in solution pH, while it was not much influenced by the co-existing anions. The thermodynamic study indicated that the reactions for the uptake of TC and OTC were spontaneous and highly favorable. Moreover, the as-synthesized CAMIL-MMT and CAMIL-SEP hydrogels demonstrated strong potential for reuse in TC and OTC removal with high reusability and strong stability. The photocatalysis study revealed that residual TC and OTC after adsorption could be further degraded by CAMIL-MMT and CAMIL-SEP hydrogels under visible light irradiation. From the above-mentioned results, the as-synthesized CAMIL-MMT and CAMIL-SEP hydrogels are promising to be considered alternative materials for the adsorptive and photocatalytic removal of TC and OTC in practical application of water and wastewater treatment.",
keywords = "Adsorption, Alginate, Antibiotics, MOF, Photocatalysis",
author = "Byungjun Cha and Nahyun Kim and Yeonji Yea and Jonghun Han and Yeomin Yoon and Sewoon Kim and Park, {Chang Min}",
note = "Funding Information: To evaluate the maximum adsorption capacities of hydrogels for TC and OTC, the adsorption isotherms were investigated at different initial concentrations of the target contaminants, as shown in Fig. 9. In addition, the experimental data were analyzed using the most common isotherm models, including the Langmuir and Freundlich models, and the results are presented in Figs. S5–S6 and Table S4. According to the R2 value, all applied hydrogels followed the Freundlich model for TC and OTC. This result supports the idea that TC and OTC were adsorbed by monolayers and multilayers onto the heterogeneous surface of an applied material [48]. Furthermore, the experimental data and calculated kF values indicate that OTC was more strongly adsorbed on the as-prepared hydrogels [49]. In addition, by showing higher 1/n values, the adsorption of TC by CAMIL-SEP and OTC by CA and CAMIL-MMT was heterogeneous on the adsorbate sites [50]. Overall, the as-synthesized hydrogels, CAMIL-MMT and CAMIL-SEP, showed significantly improved adsorption performance compared to CA based on the adsorption capacity, kinetics, and isotherm results.This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (NRF-2018R1A6A1A03024962), the Korean government (MSIT) (No. 2021R1A2C2003734 and NRF-2021R1A2C1095253), and the Korea Environment Industry & Technology Institute (KEITI) through Subsurface Environment Management (SEM) projects, funded by the Korea Ministry of Environment (MOE) (2020002480008). Funding Information: This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) , funded by the Ministry of Education ( NRF-2018R1A6A1A03024962 ), the Korean government ( MSIT ) (No. 2021R1A2C2003734 and NRF-2021R1A2C1095253 ), and the Korea Environment Industry & Technology Institute (KEITI) through Subsurface Environment Management (SEM) projects, funded by the Korea Ministry of Environment (MOE) ( 2020002480008 ). Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd and Techna Group S.r.l.",
year = "2023",
month = apr,
day = "15",
doi = "10.1016/j.ceramint.2022.12.072",
language = "English",
volume = "49",
pages = "12201--12213",
journal = "Ceramics International",
issn = "0272-8842",
publisher = "Elsevier Ltd.",
number = "8",
}