REMOVAL OF IRON FROM DRINKING WATER USING IMMOBILISED ALGAE

Namen diplomskega dela je bil učinkovita odstranitev železa iz pitne vode s pomočjo imobiliziranih alg. Uporabili smo raztopino alg Chlorella sorokiniana, ki smo jih imobilizirali na alginatne nosilce. Iz uporabljenih nosilcev smo desorbirali železo in nato regenerirali, ker nas je zanimalo, kakšen bo vpliv na učinkovitost po ponovni uporabi. Začetna koncentracija posameznih železovih ionov se je gibala med 1 in 100 mg/L. Pri začetni koncentraciji 20 mg/L Fe(II) smo dosegli najboljši rezultat po 1140 min, kjer je bila učinkovitost odstranitve železovih ionov iz pitne vode 99,8 % pri pH 9. Biosorpcijo kovinskih ionov samo preučevali v pH območju med 7 in 9. pH vpliva na absorpcijo alg, saj smo pri pH 7 dobili slabši rezultat po 1440 minutah, ko je bila učinkovitost 71,8 %. Pri pH 9 smo uporabili starejše alge po desorbciji z EDTA in je bila učinkovitost 84,0 %. Po dvakratni desorbciji se je učinkovitost zmanjšala na 62,0 %.The purpose of this diploma was to determine the efficiency of iron removal from drinking water, with the use of immobilized algae. Algae Chlorella sorokiniana was immobilized on aginate carriers. We desorbed the already used imobilized algae and then regenerated them in order to see the influence on their efficiency. The initial concentrations of iron ions were between 1 and 100 mg/L. The best result was achieved with the concentration of 20 mg/L after 1140 minutes, where the efficiency of iron ions removal from the drinking water reached 99,8 %. The best results achieved at pH 7 after 1440 minutah was 71,8 % removal efficiency. Also, old immobilized algae were used for comparison with the fresh ones. If they were reused after one desorption using EDTA the efficiency was 84,0 %, while after 2 times desorption the efficiency decreased to 62,0 %