[Removal of Oxytetracycline from Water Using Blast Furnace Slag Loaded Sulfide Nanoscale Zero-valent Iron].
Huan Jing Ke Xue
; 42(2): 867-873, 2021 Feb 08.
Article
em Zh
| MEDLINE
| ID: mdl-33742881
Blast furnace slag loaded with sulfide nano zero valent iron (S-nZVI@BFS) was applied to remove oxytetracycline (OTC) from water. S-nZVI@BFS was synthesized via liquid reduction and characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Brunauer, Emmett and Teller (BET) theory. The effect of reaction time, initial concentration of OTC, initial pH, and coexisting hexavalent chromium[Cr(â
¥)] were investigated. The results show that Fe and S were successfully immobilized on the surface of S-nZVI@BFS, the specific surface area and pore volume of which increased to 141.986 m2·g-1 and 0.388 cm3·g-1, respectively, following the loading of nZVI and sulfurization. The utilization rate of the surface active sites of S-nZVI@BFS was improved with an increase of the initial concentration of OTC; the removal rate increased from 20.12 mg·g-1 to 202.74 mg·g-1 when the initial concentration of OTC was increased from 10 mg·L-1 to 100 mg·L-1. The removal rate decreased with pH, declining from 99.78 mg·g-1 to 41.12 mg·g-1 when pH was increased from 3 to 11 due to the switch from Fendon oxidation to electrostatic adsorption. There was notable competition between OTC and Cr(â
¥) meaning that Cr(â
¥) can inhibit the removal of OTC, which is dose dependent.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oxitetraciclina
/
Poluentes Químicos da Água
Idioma:
Zh
Revista:
Huan Jing Ke Xue
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China