Adsorption of albendazole on activated carbon

Abstract

Adsorpcija je metoda separacije uzrokovana privlačnim silama između adsorbensa i molekula u plinu ili otopini koje se adsorbiraju. Koristi se za uklanjanje malih koncentracija tvari iz velikog volumena onečišćenog plina, za uklanjanje mirisa, uklanjanje hlapljivih otapala, za obradu otpadnih voda itd. Cilj ovog rada bio je ispitati učinkovitost adsorpcije na praškastom aktivnom ugljenu, tj. uklanjanje albendazola iz MilliQ vode na različitu količinu aktivnog ugljena. Koncentracije albendazola bile su od 2,96 do 6,02 mg L^-1 što se mogu pripisati koncentracijama farmaceutika u otpadnim vodama farmaceutskih tvrtki ili retentatu tlačnih membranskih operacija. Šaržni postupak provodio se na masi aktivnog ugljena od 0,001 do 1 g. Pokazana je visoka vrijednost uklanjanja albendazola. Na najmanjoj korištenoj koncentraciji, 2,96 mg L^-1, već pri masi aktivnog ugljena od 0,01 g postignuto je uklanjanje veće od 99,9 %. Pri dvostruko većoj koncentraciji albendazola, 6,02 mg L-^1, uklanjanje je bilo smanjeno. Na istoj vrijednosti mase kao u prethodnom slučaju, učinkovitost uklanjanja bila je 55,7 %.Adsorption is a method of separation caused by the adhesive forces between adsorbents and molecules in gas or solutions which adsorb. It is used for the removal of small concentrations of substances in large volumes of polluted gases, for removal of scent, for removal of volatile solvents, for treatment of waste waters ect. The objective of this study was to examine the efficiency of adsorption on Powdered Activated Carbon, i.e the removal of albendazole from MilliQ water with various amounts of activated carbon. Concentrations of albendazole were from 2.96 to 6.02 mg L^-1 which can be attributed to the concentration of pharmaceuticals in waste waters of pharmaceutical companies or pressure membrane operations retentate. Batch adsorption was conductedon the masses of activated carbon from 0.001 to 1 g. A high values of pharmaceutical removal were demonstrated. With the smallest used concentration, 2.96 mg L^-1, and a mass of activated carbon of 0.01 g a removal rate of 99.9 % was accomplished. At a concentration of albendazole twice as large, 6.02 mg L^-1, the removal rate decreased. For the same value of mass as was in the previous case, effectiveness of removal was 55.7 %