Çay atığından üretilen aktif karbon ile sulu çözeltilerinden ağır metallerin giderimi
Özet
The aim of this thesis is produce activated carbon from waste of tea factory by phosphoric acid activation with microwave pretreatment process and the adsorption capacity of produced activate carbon is to examine the removal of nickel, copper, chrome and lead from an aqueous solution. Waste of tea factory, which is washed with distilled water, were used for comparison with the produced activated carbon. First step of study, waste of tea factory was mixed with phosphoric acid. After microwave pretreatment process it was carbonized in high temperature furnace. Produced activated carbon was characterized. Original waste tea was washed with only distilled water. Surface area of activated carbon was measured 1387 m2/g and meso pore structure was determined as dominant. Second step of study, the adsorption capacity of adsorbents prepared from tea waste were investigated for the removal of nickel, copper, chrome and lead from aqueous solution. Contact time of adsorbent and heavy metals were determined. Effect of amount of adsorbents and heavy metals concentrations on the adsorption were investigated. Adsorption isotherms of each heavy metal were determined, compared to Langmuir and Freundlich equation. As conclusions, waste of tea factory, was washed with only water, which is successful to adsorption of lead from aqueous solution. Active carbon, produced from tea waste, which is successful to adsorption of nickel and chrome. Adsorption capacity of both adsorbents were determined same for copper. Adsorption data of nickel and copper was ascertained suitable to Langmuir isotherm model. Adsorption data of lead and chrome were fitted to Freundlich isotherm model.