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. 2014:2014:184058.
doi: 10.1155/2014/184058. Epub 2014 Oct 14.

Indian jujuba seed powder as an eco-friendly and a low-cost biosorbent for removal of acid blue 25 from aqueous solution

L Sivarama Krishna  1 , A Sreenath Reddy  2 , W Y Wan Zuhairi  3 , M R Taha  4 , A Varada Reddy  2
Affiliations

Indian jujuba seed powder as an eco-friendly and a low-cost biosorbent for removal of acid blue 25 from aqueous solution

L Sivarama Krishna et al. ScientificWorldJournal. 2014.

Abstract

Indian jujuba seed powder (IJSP) has been investigated as a low-cost and an eco-friendly biosorbent, prepared for the removal of Acid Blue 25 (AB25) from aqueous solution. The prepared biomaterial was characterized by using FTIR and scanning electron microscopic studies. The effect of operation variables, such as IJSP dosage, contact time, concentration, pH, and temperature on the removal of AB25 was investigated, using batch biosorption technique. Removal efficiency increased with increase of IJSP dosage but decreased with increase of temperature. The equilibrium data were analyzed by the Langmuir and the Freundlich isotherm models. The data fitted well with the Langmuir model with a maximum biosorption capacity of 54.95 mg g(-1). The pseudo-second-order kinetics was the best for the biosorption of AB25 by IJSP, with good correlation. Thermodynamic parameters such as standard free energy change (ΔG(0)), standard enthalpy changes (ΔH(0)), and standard entropy changes (ΔS(0)) were analyzed. The removal of AB25 from aqueous solution by IJSP was a spontaneous and exothermic adsorption process. The results suggest that IJSP is a potential low-cost and an eco-friendly biosorbent for the AB25 removal from synthetic AB25 wastewater.

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Figures

Figure 1
Figure 1
Chemical structure of Acid Blue 25.
Figure 2
Figure 2
FTIR spectrum of IJSP alone and AB25 loaded IJSP.
Figure 3
Figure 3
Scanning electron microscopic photograph of IJSP.
Figure 4
Figure 4
Scanning electron microscopic photograph of AB25 loaded IJSP.
Figure 5
Figure 5
Determination of the point of zero charge of IJSP.
Figure 6
Figure 6
Effect of pH on equilibrium uptake of AB25. Conditions: agitation time = 3 h; C 0 = 50 mg L−1; V = 0.025 L; Temp. = 35 ± 1°C; speed of agitation = 180 rpm; size of IJSP = <53 μm; and dose = 100 mg.
Figure 7
Figure 7
Effect of adsorbent dose on the adsorption of AB25 onto IJSP. Conditions as in Figure 6 except dose and pH = 5.44.
Figure 8
Figure 8
Effect of initial concentration and contact time on CR adsorption. Conditions: AB25 concentration: ◊: 25 mg L−1; □: 50 mg L−1; △: 75 mg L−1; ○: 100 mg L−1; and as in Figure 7.
Figure 9
Figure 9
Pseudo-first-order model for AB25 on IJSP for different initial concentrations. Conditions as in Figure 8.
Figure 10
Figure 10
Pseudo-second-order model for AB25 on IJSP for different initial concentrations. Conditions as in Figure 8.
Figure 11
Figure 11
Plot of ln K c against T −1 for the removal of AB25 by IJSP. Conditions as in Figure 8.
Figure 12
Figure 12
Langmuir isotherm of AB25 on IJSP at 35 ± 1°C. Conditions as in Figure 8.
Figure 13
Figure 13
Freundlich isotherm of AB25 on IJSP at 35 ± 1°C. Conditions as in Figure 8.
Figure 14
Figure 14
Desorption studies for the removal of AB25. Conditions as in Figure 6.
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References

    1. Moussavi G., Khosravi R. The removal of cationic dyes from aqueous solutions by adsorption onto pistachio hull waste. Chemical Engineering Research and Design. 2011;89(10):2182–2189. doi: 10.1016/j.cherd.2010.11.024. - DOI
    1. Anbia M., Hariri S. A. Removal of methylene blue from aqueous solution using nanoporous SBA-3. Desalination. 2010;261(1-2):61–66. doi: 10.1016/j.desal.2010.05.030. - DOI
    1. Hameed B. H., Hakimi H. Utilization of durian (Durio zibethinus Murray) peel as low cost sorbent for the removal of acid dye from aqueous solutions. Biochemical Engineering Journal. 2008;39(2):338–343. doi: 10.1016/j.bej.2007.10.005. - DOI
    1. Hu Z., Chen H., Ji F., Yuan S. Removal of Congo Red from aqueous solution by cattail root. Journal of Hazardous Materials. 2010;173(1–3):292–297. doi: 10.1016/j.jhazmat.2009.08.082. - DOI - PubMed
    1. Jaikumar V., Sathish Kumar K., Gnana Praksh D. Biosorption of acid dyes using spent brewery grains: characterization and modeling. International Journal of Applied Science and Engineering. 2009;7:115–125.

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