Author/Authors :
Eslamian F.S Department of Civil Engineering - Isfahan University of Technology , Taebi A Department of Civil Engineering - Isfahan University of Technology , Hasheminejad H Department of Civil Engineering - Isfahan University of Technology , Eslamian S.S Department of Water - Isfahan University of Technology
كليدواژه :
Adsorption , Dye , Acid Red 88 , Walnut Shells
چكيده لاتين :
Nowadays dyes are considered as major environmental pollutants. In this study, batch adsorption of Acid
Red 88 onto walnut shells as a low-cost adsorbent was investigated. The effect of various experimental
parameters such as initial dye concentration (25, 50, 100, 150 mg/L), adsorbent dosage (5, 10, 20, 35 g/L)
and pH (4, 6, 8) was evaluated on dye adsorption using full factorial experiment design. The adsorption
data were collected by means of spectrophotometer. The results showed that walnut shells have the
capacity to remove approximately 95 percent of acid red 88 after 90 minute of adsorption process in a
batch system at the optimum experimental condition (C = 150 mg/L, Adsorbent dosage = 35 g/L at pH =
4). While the change in pH did not significantly affect the total dye removal, adsorbent dosage showed to
be the most effective factor. Equilibrium data were achieved by isotherms namely Langmuir and
Freundlich models.
