Journal
BIORESOURCE TECHNOLOGY
Volume 121, Issue -, Pages 235-240Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.06.085
Keywords
Bio-char; Tetracycline; Modification; Adsorption mechanisms
Funding
- National Natural Science Foundation of China [50978242]
- National Water Project [2012ZX07103-001]
- Fundamental Research Funds for the Central Universities [WK2060190007]
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In this work, bio-char, a mass productive by-product of biomass fast pyrolysis, was adopted as an adsorbent to remove tetracycline (TC) from aqueous solution. To enhance the adsorption capacity, a simple modification of bio-char with acid and alkali was carried out. Bio-char samples were characterized by Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption-desorption isotherm. The results show that the alkali treated bio-char possesses larger surface area than those of raw and acid treated bio-chars, and accordingly exhibits a more excellent adsorption performance (58.8 mg/g) than the other two bio-chars and other adsorbents reported previously. The graphite-like structure of bio-char facilitates the formation of pi-pi interactions between ring structure in tetracycline molecule and graphite-like sheets. The surface area showed significant effects on TC adsorption as well as O-containing functional groups, whereas the initial pH of solution has small effects on TC adsorption under the experimental conditions. (C) 2012 Elsevier Ltd. All rights reserved.
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