REMOVAL SYNTHETIC COLOR CRYSTAL VIOLET FROM AQUATIC SOLUTIONS USING BIOADSORBENS - LIGNO-CELLULOUS MATERIAL

Sintetska bojila korištena u industriji, koja mogu biti prisutna u otpadnim vodama, imaju za posljedicu onečišćenje okoliša i predstavljaju ekološki problem. Cilj rada je bio ispitati potencijal lignoceluloznog bioadsorbensa-pivskog tropa kao nus proizvoda za uklanjanje bojila kristal violet iz vodenih otopina (pH 7,00) adsorpcijom. Upotrebljavane su različite koncentracije bojila, u odnosu na različite mase adsorbensa, te različite temperature, kroz kontaktno vrijeme od 1440 minuta. Adsorpcija, kao fizikalno kemijski postupak, jedna je od najčešće korištenih metoda velike učinkovitosti. Pokazalo se da pivski trop kao nus proizvod, lako dostupan u dovoljnim količinama, ima veliki potencijal za uklanjanje sintetskog bojila kristal violet iz vodenih otopina metodom adsorpcije. Na taj način se, ekonomski isplativim postupak, dobije efluent prihvatljive kakvoće.It is known that synthetic dyes, which can be present in industrial wastewaters, pollute the environment and consequently pose a serious ecological problem. The aim of the present work was to explore the potential of the lignocellulosic bioadsorbent-spent beer grain as a by-product for removal of crystal violet dye from aqueous sollution (pH 7.00) by adsorption. Depending on different adsorben mass, different concentrations of the dye were used as well as different temperatures during the 1440 minutes contact time. Adsorption is a physicochemical procedure which is one of the most common but also one of the highly efficient methods for water purification. As a by-product readily available in sufficient quantities, spent beer grain was shown to have a huge potential for crystal violet removal from aqueous sollutions by absorption. This may produce an effluent of acceptable quality but equally important result in an economically profitable procedure