Fixed bed studies for the sorption of chromium(VI) onto tea factory waste

摘要: Abstract The adsorption of Cr(VI) ions from aqueous solutions onto waste tea factory in fixed beds was investigated. Experiments were carried out as a function liquid flow rate, initial feed concentration, particle size, solution pH and bed depth. capacities found to increase with decreasing rate size. maximum for the tested rates be 55.65, 40.41 33.71 mg g - 1 at 5, 10 20 ml min , respectively. When concentration is increased 50 200 l corresponding capacity appears 27.67 43.67 . longest breakthrough time obtained lowest examined value. Decrease size 1.00–3.00 0.15–0.25 mm resulted significant treated volume, capacity. Breakthrough volume varies depth considerably increases about 4200 11 800 ml 5 30 cm. Thomas model on used predict curves under varying experimental conditions. This study indicated that can an effective environmentally friendly adsorbent treatment solutions.