Adsorption characteristics of typical PPCPs onto river sediments and its influencing factors

A batch equilibrium method was used to investigate the adsorption characteristics of ciprofloxacin (CIP), tetracycline (TC), sulfamethoxazole (SMX) and triclosan (TCS) onto Huangpu River sediments. Effects of adsorption time, initial concentration, solution pH and temperature on the adsorption proce...

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Bibliographic Details
Published inHuanjing kexue Vol. 36; no. 3; p. 847
Main Authors Wang, Kai, Li, Kan-Zhu, Zhou, Yi-Yuan, Liu, Zhen-Hong, Xue, Gang, Gao, Pin
Format Journal Article
LanguageChinese
Published China 01.03.2015
Subjects
Adsorption
Ciprofloxacin - chemistry
Drug Residues - chemistry
Geologic Sediments - chemistry
Kinetics
Rivers
Sulfamethoxazole - chemistry
Temperature
Tetracycline - chemistry
Triclosan - chemistry
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Summary:A batch equilibrium method was used to investigate the adsorption characteristics of ciprofloxacin (CIP), tetracycline (TC), sulfamethoxazole (SMX) and triclosan (TCS) onto Huangpu River sediments. Effects of adsorption time, initial concentration, solution pH and temperature on the adsorption process were studied. The results showed that the adsorption process of these PPCPs onto sediments was a two-step process: a rapid adsorption followed by a slow balance. The equilibrium time was about 4 h. The pH value had a significant effect on the adsorption of CIP, TC and TCS, whereas the effect on SMX adsorption was negligible. The kinetic results indicated that the adsorption processes followed the pseudo-second-order model, with adsorption rate in the range of 4.89 x 10(-3)-1.96 x 10(-2) kg x (min x mg)(-1). Adsorption isotherms were well described by the Freundlich and linear equations. As temperature increased, the amount of SMX and TC adsorbed increased, whereas CIP and TCS decreased. CIP, TC and TCS had a str
ISSN:0250-3301
DOI:10.13227/j.hjkx.2015.03.013