Abstract

Significant concerns have been raised over the presence of antibiotics including tetracyclines in aquatic environments. A series of Fe-Mn binary oxide with different Fe:Mn molar ratios was synthesized by a simultaneous oxidation and coprecipitation process for TC removal. Results showed that Fe-Mn binary oxide had higher removal efficiency than that of hydrous iron oxide and hydrous manganese oxide, and that the oxide with a Fe:Mn molar ratio of 5:1 was the best in removal than other molar ratios. The tetracycline removal was highly pH dependent. The removal of tetracycline decreased with the increase of initial concentration, but the absolute removal quantity was more at high concentration. The presence of cations and anions such as Ca2+, Mg2+, CO3(2-) and SO4(2-) had no significant effect on the tetracycline removal in our experimental conditions, while SiO3(2-) and PO4(3-) had hindered the adsorption of tetracycline. The mechanism investigation found that tetracycline removal was mainly achieved by the replacement of surface hydroxyl groups by the tetracycline species and formation of surface complexes at the water/oxide interface. This primary study suggests that Fe-Mn binary oxide with a proper Fe:Mn molar ratio will be a very promising material for the removal of tetracycline from aqueous solutions.

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Authors

Liu H, Yang Y, Kang J, Fan M, Qu J

Institution

State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. hjliu@rcees.ac.cn

Source

Journal of environmental sciences (China) 24:2 2012 pg 242-7

MeSH

Chromatography, High Pressure Liquid
Ferric Compounds
Hydrogen-Ion Concentration
Ions
Iron
Manganese Compounds
Organic Chemicals
Oxides
Spectroscopy, Fourier Transform Infrared
Tetracycline
Water Purification

Pub Type(s)

Evaluation Studies
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22655383