Mechanistic understanding of tetracycline sorption on waste tire powder and its chars as affected by Cu2+ and pH

作者：Lian, Fei^*; Song, Zhengguo; Liu, Zhongqi; Zhu, Lingyan; Xing, Baoshan

来源：Environmental Pollution, 2013, 178: 264-270.

DOI：10.1016/j.envpol.2013.03.014

• Tetracycline (TC)
• Waste tire
• Tire char
• Sorption mechanism
• Cu2+
• pH

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.

• 出版日期2013-7
• 单位南开大学