Hossein Jafari Mansoorian - Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
Ahmad Jonidi Jafari - Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
Ahmad Reza Yari - Research Center for Environmental Pollutants, Qom University of Medical Sciences, Qom, Iran
Amir Hossein Mahvi - School of Public Health and Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran

Background & Aims of the Study: Textile wastewaters are very various in chemicalqualities. In other words, these industries are one of the largest producing dyes compounds;therefore their treatment is so complex and difficult. The aim of this study was to evaluatethe potential removal of Reactive Red 198 and Blue Reactive 19 from synthetic solution byAcaciatortilis shuck as a naturally absorbent.Materials & Methods: The dyes samples with concentration (10, 50 and 500 mg/L) wasprepared in laboratory. Next step was to determination of optimum pH among (pHsolutions of 2, 4, 6, 8 and 10) and optimum adsorbate dosage with mesh 30-60 and 60-100among (0.5, 1, 2, 3 and 4 g/L).Sampling in times 10, 20, 40 and 80 minute was done fromthe supernatant and was filtered (through 0.45 μm); finally the dye concentration wasobtained by Spectrophotometer device. Adsorption isotherms of dyes Acaciatortilis shuckcan were determined and correlated with common isotherm equations such as Langmuirand Freundlich models.Results: The highest efficiency of dye removal from dyes solutions in pH 4, 10 min contacttime and 2 g/L adsorbate dosage and using mesh 60-100 was for both Reactive Red 198 andBlue 19. Also the adsorption rate of reactive dyes was increased by increasing of initial dyeconcentration. The efficiencies for Reactive Red 198 and Blue 19 were 77.54% and 77%respectively. Adsorption isotherms was examined by Freundlich and Langmuir isothermthat finally showed the Freundlich multe-layer isotherm has better accordance with dates.Conclusions: The results illustrate Acaciatortilis shuck is effective adsorbent and can beused as an available and inexpensive adsorbent to removal of textile dyes from effluent.

Reactive Red 198Reactive Blue 19AdsorptionAcaciatortilis shuckSynthetic solutionAzo Dey