Investigation into the bio-adsorption of chromium ion (VI) from the aqueous solutions using response surface methodology

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Mohammadian gazaz Someyyeh; KHOSHHAL ABBAS; ZARE neyestanak HANIEH

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Journal: Journal of Natural Environment Year:2018 | Volume:70 | Issue:4 Page(s): 923-934

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Title

Investigation into the bio-adsorption of chromium ion (VI) from the aqueous solutions using response surface methodology

Author(s)

Mohammadian gazaz Someyyeh | KHOSHHAL ABBAS | ZARE neyestanak HANIEH | Issue Writer Certificate

Keywords

Environmental pollutantsQ1

BiosorptionQ1

chromium ionQ1

residual biofuelQ1

Response Surface MethodologyQ1

Abstract

The purpose of this research was to investigate the removal of chromium (VI) from an aqueous solution using the waste of bio-adsorbents, oil cake, by design of experiment and modeling via Response Surface Methodology. The research process was conducted in two stages, taking into account different variables, including studied pH, temperature, absorber dosage, initial concentration of chromium ion and mixing speed. By Response Surface Methodology, three-dimensional graphs were plotted which showed the effects and interactions of variables. Increasing on temperature from 30° C to 40° C caused more absorption of chromium; however more increase, to 50° C, led to a decrease in the absorption. At lower pH, higher adsorption occurred. In the more acidic environment, the changes in the temperatures were more effective. In the second stage, the resulting three-dimensional graphs showed pages with positive slope, versus three variables of absorber dosage, initial concentration of chromium ion and mixing speed. Increasing the dosage, initial concentration and speed, had great effects on the absorption of chromium. Equations obtained from Response Surface Methodology represented the mathematical relationship between the absorption of chromium as a function of variables; with coefficients of determination above 95%. Absorption values for different circumstances were predicted using the model equations and compared with the experimental results, which showed the desirable fittings.

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APA: Copy

Mohammadian gazaz, Someyyeh, KHOSHHAL, ABBAS, & ZARE neyestanak, HANIEH. (2018). Investigation into the bio-adsorption of chromium ion (VI) from the aqueous solutions using response surface methodology. JOURNAL OF NATURAL ENVIRONMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), 70(4 ), 923-934. SID. https://sid.ir/paper/195008/en

Vancouver: Copy

Mohammadian gazaz Someyyeh, KHOSHHAL ABBAS, ZARE neyestanak HANIEH. Investigation into the bio-adsorption of chromium ion (VI) from the aqueous solutions using response surface methodology. JOURNAL OF NATURAL ENVIRONMENT (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2018;70(4 ):923-934. Available from: https://sid.ir/paper/195008/en

IEEE: Copy

Someyyeh Mohammadian gazaz, ABBAS KHOSHHAL, and HANIEH ZARE neyestanak, “Investigation into the bio-adsorption of chromium ion (VI) from the aqueous solutions using response surface methodology,” JOURNAL OF NATURAL ENVIRONMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 70, no. 4 , pp. 923–934, 2018, [Online]. Available: https://sid.ir/paper/195008/en

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