THE STUDY OF SORPTION EQUILIBRIUM OF CHROMIUM (VI) FROM AQUEOUS SOLUTIONS USING RICE BRAN

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NAMENI MAHBOOBEH; ALAVI MOGHADAM MOHAMMAD REZA; ARAMI MOKHTAR

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Journal: JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY Year:2009 | Volume:10 | Issue:4 (SPECIAL ISSUS 39) Page(s): 0-0

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Title

THE STUDY OF SORPTION EQUILIBRIUM OF CHROMIUM (VI) FROM AQUEOUS SOLUTIONS USING RICE BRAN

Author(s)

NAMENI MAHBOOBEH | ALAVI MOGHADAM MOHAMMAD REZA | ARAMI MOKHTAR | Issue Writer Certificate

Keywords

ADSORPTIONQ2

CHROMIUM (VI)Q3

RICE BRANQ2

ADSORPTION ISOTHERMQ2

ADSORPTION KINETICSQ2

Abstract

In this research, the ADSORPTION of Cr (VI) ions on RICE BRAN has been studied using batch ADSORPTION techniques. The main objectives of this study are 1) to investigate the chromium ADSORPTION from aqueous solution by RICE BRAN, 2) to study the effect of experimental conditions -such as pH, contact time and initial chromium concentration- on ADSORPTION process performance and 3) to determine appropriate ADSORPTION isotherm and kinetics parameters of Cr (VI) ADSORPTION on RICE BRAN.The results showed that ADSORPTION of chromium by RICE BRAN reached equilibrium after 120 minutes and following this time a little change was observed in the efficiency of chromium removal. Higher chromium ADSORPTION was observed in lower pHs and maximum chromium removal (99.8%) was obtained in the pH of 2 for an initial concentration of 5 mg/l. ADSORPTION decreased with an increase in the initial chromium concentration. The obtained results also revealed that among 6 studied isotherm models (Langmuir, Freundlich, BET, Temkin, D-R and generalized ADSORPTION models), the ADSORPTION of chromium (VI) by RICE BRAN followed Frendlich isotherm equation with a correlation coefficient of 0.997. The maximum monolayer ADSORPTION capacity was determined to be 0.208 mg/g for the experimental conditions of the present study. In addition, the kinetic order of the ADSORPTION of chromium by the studied adsorbent follows a pseudo-first order rate with a high correlation factor (R2³0.99) at 25oC. The results indicate that RICE BRAN can be used as a lowcost alternative to commercial adsorbents in the removal of Cr (VI) from water and wastewater.

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APA: Copy

NAMENI, MAHBOOBEH, ALAVI MOGHADAM, MOHAMMAD REZA, & ARAMI, MOKHTAR. (2009). THE STUDY OF SORPTION EQUILIBRIUM OF CHROMIUM (VI) FROM AQUEOUS SOLUTIONS USING RICE BRAN. JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 10(4 (SPECIAL ISSUS 39)), 0-0. SID. https://sid.ir/paper/396159/en

Vancouver: Copy

NAMENI MAHBOOBEH, ALAVI MOGHADAM MOHAMMAD REZA, ARAMI MOKHTAR. THE STUDY OF SORPTION EQUILIBRIUM OF CHROMIUM (VI) FROM AQUEOUS SOLUTIONS USING RICE BRAN. JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY[Internet]. 2009;10(4 (SPECIAL ISSUS 39)):0-0. Available from: https://sid.ir/paper/396159/en

IEEE: Copy

MAHBOOBEH NAMENI, MOHAMMAD REZA ALAVI MOGHADAM, and MOKHTAR ARAMI, “THE STUDY OF SORPTION EQUILIBRIUM OF CHROMIUM (VI) FROM AQUEOUS SOLUTIONS USING RICE BRAN,” JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, vol. 10, no. 4 (SPECIAL ISSUS 39), pp. 0–0, 2009, [Online]. Available: https://sid.ir/paper/396159/en

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