Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2017 May 25;9(5):4312-4321.
doi: 10.19082/4312. eCollection 2017 May.

Removal of Acid Orange 7 dye from aqueous solutions by adsorption onto Kenya tea pulps; granulated shape

Behnaz Naraghi  1 , Fahimeh Zabihi  1 , Mohammad Reza Narooie  2 , Mahdi Saeidi  3 , Hamed Biglari  4
Affiliations

Removal of Acid Orange 7 dye from aqueous solutions by adsorption onto Kenya tea pulps; granulated shape

Behnaz Naraghi et al. Electron Physician. .

Abstract

Background and aim: Water resources pollution control is one of the main challenges of our time for researchers. Colored wastewater discharges caused by textile industry activities has added to the concern. In this study, removal of Acid Orange 7 dye (AO7) using Kenya Tea residue absorbent (granular) has been studied.

Methods: This cross-sectional study was conducted in 2016. In this work, initially, tea residue was prepared in three forms of raw, treated with concentrated phosphoric acid, and carbonated, at temperatures of 350, 450 and 500 °C in the chemistry laboratory of Gonabad University of Medical Sciences. Then, efficiency of the above absorbents in the removal of Acid Orange 7 dye in initial concentrations of dye as 50-500 mg/l from water samples in terms of pH 2-10 and 1-10 g/l of adsorbent dose within 20 to 300 minutes was investigated. In addition, their subordination from Langmuir and Freundlich absorption isotherms was also determined. Concentration changes in Acid Orange 7 dye at a wavelength of 483 nm was determined by spectrophotometry and results were reported using descriptive statistics.

Results: Results showed that efficiency of Acid Orange 7 dye removal is higher in acidic pH and higher adsorbent dosage. The highest efficiency of Acid Orange 7 dye removal was 98.41% by raw tea residue absorbent at pH 2, reaction time was 120 minutes and initial concentration of dye was 50 mg/l, which was obtained at adsorbent dosage of 10 g/l. It was determined that the mechanism of absorption acceptably follows Freundlich absorption isotherm (R2=0.97).

Conclusion: Due to the availability and very low price, optimal performance of Kenya tea raw residue (granular) in Acid Orange 7 dye removal, it can be used as an efficient surface absorber in an absorber from colored wastewater.

Keywords: Acid Orange 7; Adsorption; Aqueous Solutions; Dye Removal; Granulated Shape; Kenya Tea Pulps.

PubMed Disclaimer

Conflict of interest statement

Conflict of Interest: There is no conflict of interest to be declared.

Figures

Figure 1
Figure 1
Effect of initial pH on Orange dye adsorption with tea pulp (Adsorbent dosage 10 g/l, dye con 50 mg/l, Time 120 min)
Figure 2
Figure 2
Effect of adsorbent dosage on AO7 dye with tea pulp (Adsorbent dosage 10 g/l, dye con 50 mg/l, Time 120 min, pH 2)
Figure 3
Figure 3
Effect of dye concentration on AO7 dye removal with tea pulp (Adsorbent dosage 10 g/l, Time 120 min, pH 2)
Figure 4
Figure 4
Effect of dye contact time on AO7 dye removal with tea pulp (Adsorbent dosage 10 g/l, dye con 50 mg/l, pH 2)
Figure 5
Figure 5
Effect of temperature on AO7 dye removal with tea pulp (Adsorbent dosage 10 g/l, dye con 50 mg/l, contact time 120 min, pH 2)
Figure 6
Figure 6
Isotherm of Langmuir of AO7 dye removal with tea pulp (Adsorbent dosage 10 g/l, contact time 120 min, pH 2)
Figure 7
Figure 7
Isotherm of Freundlich of AO7 dye removal with tea pulp (Adsorbent dosage 10 g/l, contact time 120 min, pH 2)
See this image and copyright information in PMC

References

    1. Zhou T, Lu X, Wang J, Wong FS, Li Y. Rapid decolorization and mineralization of simulated textile wastewater in a heterogeneous Fenton like system with/without external energy. J Hazard Mater. 2009;165(1–3):193–9. doi: 10.1016/j.jhazmat.2008.09.100. - DOI - PubMed
    1. Yarmohammadi H, Ziaei M, Poursadeghiyan M, Moradi M, Fathi B, Biglari H, et al. Evaluation of Occupational Risk Assessment of Manual Load Carrying Using KIM Method on Auto Mechanics in Kermanshah City in 2015. Research Journal of Medical Sciences. 2016;10(3):116–9. doi: 10.3923/rjmsci.2016.116.119. - DOI
    1. Rahmanpour Salmani E, Ghorbanian A, Ahmadzadeh S, Dolatabadi M, Nemanifar N. Removal of Reactive Red 141 Dye from Synthetic Wastewater by Electrocoagulation Process: Investigation of Operational Parameters. Iranian Journal of Health, Safety and Environment. 2016;3(1):403–11.
    1. dos Santos AB, Cervantes FJ, van Lier JB. Review paper on current technologies for decolourisation of textile wastewaters: perspectives for anaerobic biotechnology. Bioresour Technol. 2007;98(12):2369–85. doi: 10.1016/j.biortech.2006.11.013. - DOI - PubMed
    1. Biglari H, Afsharnia M, Alipour V, Khosravi R, Sharafi K, Mahvi AH. A review and investigation of the effect of nanophotocatalytic ozonation process for phenolic compound removal from real effluent of pulp and paper industry. Environ Sci Pollut Res Int. 2017;24(4):4105–16. doi: 10.1007/s11356-016-8079-x. - DOI - PubMed

LinkOut - more resources