Thermodynamics of tetracycline adsorption on silica

被引：145
作者：
Turku, I. [1 ]
Sainio, T. [1 ]
Paatero, E. [1 ]
机构：
[1] Lappeenranta Univ Technol, Lab Ind Chem, Lappeenranta 53851, Finland
来源：
ENVIRONMENTAL CHEMISTRY LETTERS | 2007年 / 5卷 / 04期
关键词：
tetracycline; silica; irreversible adsorption; Langmuir isotherm;
D O I：
10.1007/s10311-007-0106-1
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The adsorption of antibiotic tetracycline onto silica particles was investigated. The effects of pH, electrolyte concentration and temperature on the adsorption equilibrium were examined and the data correlated with a dual site adsorption model. Adsorption of tetracycline onto approximately 9% of the adsorption sites was found to be irreversible, whereas the rest exhibited Langmuir behaviour. Increasing pH of the solution had a strong negative effect on the adsorbed amounts. Adsorption decreased also with increasing ionic strength and temperature. The enthalpy and entropy of adsorption were found to be approximately -16 and -25 J/mol, respectively.
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页码：225 / 228
页数：4
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