ADSORPTION ON A FIXED - BED COLUMN OF Cr(VI) FROM AQUEOUS SOLUTION ON KOH- MODIFIED REJECTED TEA

Abstract

    Abstract: The KOH - modified rejected tea (KRT) was used as a adsorbent to removeefficiently Cr(VI) from aqueous solution in fixed-bed column. Scanning electron microscopy(SEM) images of KRT reveal a highly porous surface structure. Experiments were performedas a function of initial feed of Cr(VI) concentration, particle size, the amount of adsorbent. Atthe time of C = 0,001Co and C = 0,05Co, the maximum bed capacities is 1472.69 mg/L (7.36mg /g), downtime is 0.6526 h and 3917.86 mg/L (19.56mg/g), downtime is 0.6445h;respectively. KRT also was used as a adsorbent to remove efficiently Cr(VI) from waste waterof Minh Khai Lock Company (WWMK). This study indicated that the KRT can be used as aneffective and environmentally friendly adsorbent for the treatment of Cr(VI) ions in aqueoussolutions.

Keywords: Adsorption; tea waste, fixed- bed column; heavy metals; KOH- modified rejected tea.