Efficiency of Glycyrrhiza Glabra Ash in Dye Removal

Dye is one of the most important pollutants in textile industry wastewater and is often toxic, carcinogenic, and mutagenic. Thus, dye contaminants should be treated before discharge into the environment. This study was conducted to assess the efficiency of Glycyrrhiza glabra ash in Reactive Black 5 dye removal from aqueous solutions.
The present experimental study was performed at a laboratory scale. The adsorbent was prepared under laboratory conditions and pulverized using ASTM standard sieves. In this research, the effect of pH (2-12), initial dye concentration (20, 60, and 80 mg/l), absorbent dosage (0.3-2 gr/100 ml), and reaction time (10-180 minutes) were investigated.
Findings: The results showed that the efficacy of Glycyrrhiza glabra root ash in dye removal decreased with increase in pH and initial dye concentration, and increased with increase in exposure time during the initial 60 minutes. The results followed the Langmuir isotherm (R2 = 0. 9467).
The results showed that licorice root ash has desirable efficacy (98.48% removal at a concentration of 20 mg of pollutant) in the removal of Reactive Black 5 dye from aqueous solutions and textile industry wastewater.