期刊
CHEMOSPHERE
卷 255, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.126917
关键词
Nanocomposites; Zero-valent iron; Activated carbon; Tetracycline antibiotics; Adsorptive removal
资金
- Key Lab of Eco-restoration of Regional Contaminated Environment (Shenyang University), Ministry of Education [2019_ERRCE_G5]
- Liaoning Natural Science Foundation
- Open Foundation of Shenyang National Laboratory for Materials Sciences [2015021019]
The hybrid nanocomposites of zero-valent iron loaded the activated carbon derived from the corn stalk (ZVI@ACCS) was prepared and used to remove the antibiotics of tetracycline (TC), oxytetracycline (OTC) and chlortetracycline (CTC) from aqueous solution. The adsorption amounts of three antibiotics (103.1 mg g(-1) for CTC, 72.9 mg g(-1) for OTC and 81.5 mg g(-1) for TC) were sensitive to the temperature and independent of pH in the range of 4.2-7.1 at 298 K through the synergistic interactions of the electrostatic attraction, the bridging complexation and the surface complexation. The equilibrium was performed within 20 min at 298 K. The spontaneous (Delta G degrees <0) and endothermic (Delta H degrees >0) adsorption of three antibiotics onto the ZVI@ACCS nanocomposites gave a better matching (r(2) > 0.99) with Langmuir and pseudo-second-order models. (C) 2020 Elsevier Ltd. All rights reserved.
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