Journal
ENVIRONMENTAL POLLUTION
Volume 178, Issue -, Pages 264-270Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2013.03.014
Keywords
Tetracycline (TC); Waste tire; Tire char; Sorption mechanism; Cu2+; pH
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Funding
- National Natural Science Foundation of China [41203083]
- Central Public Research Institutes Basic Funds for Research and Development (Agro-Environmental Protection Institute, Ministry of Agriculture)
- Fundamental Research Funds for the Central Universities
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The sorption characteristics of tetracycline (TC) by waste tire powder and its chars were investigated to explore the potential of using waste tires as effective sorbents for removal of TC from aqueous solution. Naphthalene (NAPH), a typical hydrophobic organic compound, was selected as asorbate for comparison. TC displayed much lower sorption affinity to tire powder than NAPH. However, it exhibited similar adsorption affinity as NAPH on the pyrolyzed tire chars, which was mainly attributed to pi-pi electron-donor acceptor interactions of TC with the graphite surface of chars. TC and Cu2+ could mutually facilitate the sorption of each other on both tire powder and pyrolyzed chars in a wide pH range. This could be explained by the metallic complexation and/or surface-bridging mechanisms (i.e., Cu- or TC-bridging). However, Cu2+ and NAPH depressed the sorption of each other on tire powder and displayed negligible impact to each other on the highly pyrolyzed chars. (C) 2013 Elsevier Ltd. All rights reserved.
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