Pharmaceuticals used in large quantities throughout Palestine as prescription and non-prescription drugs have been reaching the environment via different routes. Hence, a new technology is needed for the removal of such pharmaceuticals from wastewater. In the study to be presented, the efficiency of the components of an integrated system containing hollow fiber, spiral wound (UF membranes), carbon, clay micelle complex filters and RO membranes towards the removal of several NSAID drugs were investigated., Kinetic studies on the removal of several NSAIDs drugs and their degradation products were studied in pure water and wastewater conditions. Adsorption of studied compounds onto a clay- (octadecyltrimethylammonium) micelle complex and activated charcoal adsorbents were investigated. Equilibrium relationships between adsorbents (i.e. clay micelle complex and activated charcoal) and adsorbate (i.e. NSAID drug) were described by Langmuir adsorption isotherms. A list of the Langmuir constants, k, and the values of maximum mass of pharmaceutical removed per gram of adsorbent, Qmax, is reported. Aspirin and Paracetamol were easily degraded in water or sludge giving rise to salicylic acid and paminophenol, respectively, and a stoichiometric amount of acetic acid. Naproxen resulted in desmethylnaproxen as main byproduct in sludge. Diclofenac, ibuprofen and mefenamic acid were not degraded during the observation time.
EFFICIENCY OF ADVANCED MEMBRANE WASTEWATER TREATMENT TECHNOLOGY COUPLED WITH ACTIVATED CARBON AND CLAY MICELLES COMPLEXES TOWARDS REMOVAL OF NSAID DRUGS
BUFO, Sabino Aurelio;SCRANO, Laura;
2012-01-01
Abstract
Pharmaceuticals used in large quantities throughout Palestine as prescription and non-prescription drugs have been reaching the environment via different routes. Hence, a new technology is needed for the removal of such pharmaceuticals from wastewater. In the study to be presented, the efficiency of the components of an integrated system containing hollow fiber, spiral wound (UF membranes), carbon, clay micelle complex filters and RO membranes towards the removal of several NSAID drugs were investigated., Kinetic studies on the removal of several NSAIDs drugs and their degradation products were studied in pure water and wastewater conditions. Adsorption of studied compounds onto a clay- (octadecyltrimethylammonium) micelle complex and activated charcoal adsorbents were investigated. Equilibrium relationships between adsorbents (i.e. clay micelle complex and activated charcoal) and adsorbate (i.e. NSAID drug) were described by Langmuir adsorption isotherms. A list of the Langmuir constants, k, and the values of maximum mass of pharmaceutical removed per gram of adsorbent, Qmax, is reported. Aspirin and Paracetamol were easily degraded in water or sludge giving rise to salicylic acid and paminophenol, respectively, and a stoichiometric amount of acetic acid. Naproxen resulted in desmethylnaproxen as main byproduct in sludge. Diclofenac, ibuprofen and mefenamic acid were not degraded during the observation time.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
