Journal of Rafsanjan University of Medical Sciences

  Background and Objective: Colors are complex structural materials, which enter into the environment due to finishing processes of textiles such as dyeing and printing. Reactive Blue 19 dye is used widely in the textile industry within the country. Therefore, we investigated the efficiency of the Russian knapweed flower powder as natural adsorbent in the removal of Reactive Blue 19 dye from synthetic textile wastewater.

  Materials and Methods: This experimental study was performed in laboratory scale. In this study, the effect of adsorbent dose, contact time, pH and different dye concentrations on efficiency of adsorption process has been studied and finally, correspondence rate of data to Langmuir and Freundlich isotherms and pseudo-first-order and pseudo-second-order adsorption kinetics were determined. For analysis of the data liner regression and R² parameter and design of curves were used.

  Results: According to the obtained results, increasing of adsorbent dose from 0.2 to 0.6 gr/100ml in concentrations of 10 and 25 mg/l RB19 led to an increase in the of removal efficiency from 77% to 88% and from 72% to 82%. Adsorption capacity by increasing of initial pH from 4 to 10 for concentrations of 10 and 25 mg/l has increased from 0.28 to 1.64 mg/g and from 2.3 to 3.945 mg/g, respectively. Obtained results showed that with the increase of contact time, removal efficiency increased and with increasing of initial dye concentration, removal efficiency decreased. According the to obtained results, Langmuir isotherm was in good concordance with the 1`data. The model of pseudo-second-order kinetic has shown better agreement with the experimental data.

  Conclusion: The results indicated the suitability of Russian knapweed flower powder as natural adsorbent for color removal.

  Key words: Reactive Blue 19 dye, Natural absorbent, Russian knapweed flower powder, Adsorption, Textile wastewater

  Funding: This research was funded by Yazd Shahid Sadoughi University of Medical Sciences.

  Conflict of interest: None declared.

  Ethical approval: The Ethics Committee of Yazd Shahid Sadoughi University of Medical Sciences approved the study.

  How to cite this article : Ghaneian MT, Dehvari M, Jourabi Yazdi N, Mootab M, Jamshidi B. Evaluation of Efficiency of Russian Knapweed Flower Powder in Removal of Reactive Blue 19 from Synthetic Textile Wastewater . J Rafsanjan Univ Med Sci 2014 12(10): 831-42. [Farsi]

Background and Objective: Dyes have complicated structures, usually toxic and resistant to biological treatment which entered to environment by industrial waste streams. The aim of this study was the survey of isotherm and kinetic adsorption studies of Reactive Blue 19 (RB19) dye onto Barberry stems powder from textile industrial wastewater.

Materials and Methods: This study was done in laboratory scale and used Barberry stems powder for removal of RB19 dye. In this study the effects of initial dye concentrations (25 and 50 mg/L), pH (2, 4, 7, 9), adsorbent doses (0.2, 0.4 and 0.6 gr/100 ml) and contact time (15, 30, 60, 120, 180 min and 24 hr) were investigated. The dye concentration was determined by using the UV/Vis spectrophotometer at 592 nm. For better understanding of the adsorption process, the experimental data were analyzed with Langmuir and Freundlich isotherm models and kinetic studies.

Results: The results showed that removal of RB19 dye with Barberry stems powder as a natural biosorbent increased by expanding of time and adsorbent dose. By decreasing the initial dye concentration and pH, dye removal efficiency has increased. In this study, the best fit of the adsorption isotherm data was obtained using the Langmuir model. Kinetic analysis of our results showed that the findings well fitted by pseudo-second-order reaction.

Conclusion: We can conclude that Barberry stems powder as a biosorbent could be used for dye removal from aqueous solutions.

Key words: Adsorption process, Barberry stems powder, Reactive Blue 19 dye, Isotherm, Kinetic

Funding: This study was funded by research deputy of Yazd University of Medical Sciences.

Conflict of interest: None declared.

Ethical approval: The Ethics Committee of Yazd University of Medical Sciences approved the study.

How to cite this article:  MT. Ghaneian, T. Jasemizad, F. Sahlabadi, M. Miri, M. Mootab. Survey the Efficiency of Barberry Stem Powder in Removal of the Reactive Blue 19 from Textile Industrial Wastewater. J RafsanjanUniv Med Sci 2014 13(7): 631-40. [Farsi]