Water remediation by micelle-clay system: case study for tetracycline and sulfonamide antibiotics.
Removal of tetracycline and sulfonamide antibiotics from water by micelles pre-adsorbed on montmorillonite was studied. Micelles of benzyldimethylhexadecylammonium (BDMHDA) were used. Batch experiments demonstrated that the micelle-clay complexes (1% w/w) removed 96-99.9% of antibiotics from their water solutions containing from 5 to 50 mg/L of pharmaceuticals. Column filters (25 cm) made of a mixture of quartz sand and BDMHDA micelle-clay complex at 100:1 w/w ratio removed 94-99.9% of above pharmaceuticals from initial solutions containing 10mg/L and 89% of sulfamethizole from an initial solution containing 10 microg/L of this antibiotic. These filters were also very efficient in the removal of antibiotics in the presence of dissolved soil organic matter removing 89-99% of tetracycline and sulfamethizol from initial solutions containing 10 mg/L of antibiotic in the presence of 8 mg/L of humic acid, or 9 mg/L of fulvic acid. These data indicate that micelle-clay complexes are very efficient for water purification from tetracycline and sulfonamide antibiotics.
Polubesova
Tamara
T
Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot 76100, Israel. polubeso@agri.huji.ac.il
Zadaka
Dikla
D
Groisman
Ludmila
L
Nir
Shlomo
S
D000538:Aluminum Silicates; D000900:Anti-Bacterial Agents / Q000737:chemistry*; D000077215:Clay; D008823:Micelles; D013449:Sulfonamides / Q000737:chemistry*; D013752:Tetracycline / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D000538:Aluminum Silicates; D000900:Anti-Bacterial Agents; D008823:Micelles; D013449:Sulfonamides; D014874:Water Pollutants, Chemical; D013752:Tetracycline; D000077215:Clay