Arsenic Removal from Water by Adsorption on Modified Sunflower Husk

Arsen je kemijski element široko rasprostranjen u okolišu. Zbog svoje rasprostranjenosti u vodenim sustavima predstvalja problem za ljudsko zdravlje jer je vrlo toksičan. Budući da je voda jedan od najdragocjenijih prirodnih resursa znanstvenici već dugi niz godina razvijaju metode za pročišćavanje vode. Učinkovitost pri uklanjanju arsena pokazale su taložne, membranske, adsorpcijske metode te ionska izmjena. Postoje mnogi adsorpcijski materijali koji su se pokazali učinkovitim u uklanjanju arsena iz vode, a zadatak ovog rada bio je ispitati učinkovitost nusproizvoda prehrambene industrije kao adsorpcijskog materijala, točnije, ljuske suncokreta. Učinkovitost uklanjanja arsena je ispitana adsorpcijom na ljusku suncokreta iz modelnih otopina arsena u ovisnosti o početnoj koncentraciji arsena u modelnoj otopini, vremenu adsorpcije, pH vrijednosti modelne otopine te masi adsorbensa.Arsenic is chemical element widespread in environment. Due to its prevalence in water systems it represents a significant problem for public health because of its high toxicity. Since water represents a very important natural resource, scientists develope methods for its purificiation for years. Methods that proved themselves to be efficient are sedimentary methods, membrane processes, adsorption and ion exchange. There are many materials which showed their efficiency in removal of arsenic from water, and task of this thesis was to determine efficiency of food industry byproducts, precisely, sunflower husk. Efficiency of arsenic removal was tested in adsorption on sunflower husk from model solutions of arsenic depending on initial concentration of arsenic in model solution, pH of model solution, time of adsorption and mass of adsorbents