科研之友
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摘要
In the paper, the problem of water pollution risks with pharmaceuticals was discussed. The results of the investigation from different countries are shown. Polish results are presented as well. Particular emphasis was put on water pollution with non-steroidal anti-inflammatory and psychoactive drugs. The need for additional disinfection of drinking water has been highlighted. The aim of this study was to evaluate the ultrasonic (US) process on the degradation of pharmaceuticals. For testing non-steroidal anti-inflammatory and analgesic drugs were selected. The tests were performed using Malvern Mastersizer 2000 particle size analyzer with a sonotrode. The samples were exposed to an ultrasonic field with parameters 250W and 20 kHz. During the experiment, sonication time was altered and it was equalled to 30, 60, 120, and 240 s. Based on the results, the relationship between the ultrasonic field, length of its duration, and particles' diameters was determined. Particle sizes were strongly correlated with the intensity and time of the ultrasonic field exposition. The largest particles were obtained for unmodified samples and they amounted to even 479 mu m. The smallest particles were obtained for samples modified for 240 s and amounted to 0.724 mu m for ketoprofen.
- 出版日期2014-5
