TY - JOUR
T1 - Sorption of sulfonamides and tetracyclines to montmorillonite clay
AU - Avisar, Dror
AU - Primor, Orna
AU - Gozlan, Igal
AU - Mamane, Hadas
N1 - Funding Information:
Acknowledgments The authors gratefully acknowledge the Porter School for Environmental Studies (PSES) at Tel-Aviv University for their financial support and Professor Giora Rytwo for his essential comments.
PY - 2010/6
Y1 - 2010/6
N2 - The current study investigated the sorption of sulfadimethoxine (SMT), sulfamethoxazole (SMX), tetracycline (TET), and oxytetracycline (OTC) to Na-rich montmorillonite clay in synthetic effluent (SE) and field wastewater effluent (FE). Both SMT and SMX showed a low sorption capacity and are therefore likely to be highly mobile in the environment, while the sorption of TET to clay in environmental pH range (6.5-7.5) showed similarly high adsorption capacity. Differences in sorption capacities of TET and OTC to SE or FE were attributed to the various concentrations of divalent cations in the effluents. In addition, differences in sorption of OTC or TET to SE were attributed to their different molecular structure. Moreover, the adsorption of TET in SE and FE showed linear adsorption isotherms and fitted to Freundlich model. Further experiments showed that addition of humic acid or SE to TET sorbed to clay did not enhance or suppress the sorption of TET to clay.
AB - The current study investigated the sorption of sulfadimethoxine (SMT), sulfamethoxazole (SMX), tetracycline (TET), and oxytetracycline (OTC) to Na-rich montmorillonite clay in synthetic effluent (SE) and field wastewater effluent (FE). Both SMT and SMX showed a low sorption capacity and are therefore likely to be highly mobile in the environment, while the sorption of TET to clay in environmental pH range (6.5-7.5) showed similarly high adsorption capacity. Differences in sorption capacities of TET and OTC to SE or FE were attributed to the various concentrations of divalent cations in the effluents. In addition, differences in sorption of OTC or TET to SE were attributed to their different molecular structure. Moreover, the adsorption of TET in SE and FE showed linear adsorption isotherms and fitted to Freundlich model. Further experiments showed that addition of humic acid or SE to TET sorbed to clay did not enhance or suppress the sorption of TET to clay.
KW - Antibiotics
KW - Montmorillonite clay
KW - Pharmaceutical contaminants
KW - Sorption
KW - Wastewater effluent
UR - http://www.scopus.com/inward/record.url?scp=77952236655&partnerID=8YFLogxK
U2 - 10.1007/s11270-009-0212-8
DO - 10.1007/s11270-009-0212-8
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AN - SCOPUS:77952236655
SN - 0049-6979
VL - 209
SP - 439
EP - 450
JO - Water, Air, and Soil Pollution
JF - Water, Air, and Soil Pollution
IS - 1-4
ER -
