Column adsorption of chromium(VI) by strong alkaline anion-exchange fiber

Wenqing Wang; Mingyu Li; Qingxuan Zeng

doi:10.1002/app.36634

Column adsorption of chromium(VI) by strong alkaline anion-exchange fiber

Wenqing Wang, Mingyu Li^*, Qingxuan Zeng

^*Corresponding author for this work

School of Mechatronical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The removal of chromium(VI) from saturated sodium chloride (NaCl) solution by strong alkaline anion-exchange fiber (SAAEF) was achieved with column experiments. Factors affecting the adsorption, such as the pH value, loading density, flow rate, and operational temperature, were investigated. The results show that Cr(VI) removal was remarkably pH dependent. The optimal operational conditions were as follows: pH value = 2.0, loading density = 0.12-0.19 g/cm³, room temperature, and flow rate = 6-12 BV/h. The SAAEF column could be regenerated completely by 2% NaOH in saturated NaCl or 2% KOH in 15% KCl as an eluent. Cr(VI) was recycled as Na₂Cr₂O ₇ and K₂Cr₂O₇, respectively. The desorption rate of Cr(VI) reached 98.09%. The adsorption ability of the SAAEFs was stable after repeated use. Overall, the results indicate that SAAEF proved to be an effective material for the adsorption of high concentrations of Cr(VI) from a saturated NaCl solution.

Original language	English
Pages (from-to)	1733-1738
Number of pages	6
Journal	Journal of Applied Polymer Science
Volume	126
Issue number	5
DOIs	https://doi.org/10.1002/app.36634
Publication status	Published - 5 Dec 2012

Keywords

adsorption
fibers
functionalization of polymers
ion exchangers

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10.1002/app.36634

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title = "Column adsorption of chromium(VI) by strong alkaline anion-exchange fiber",

abstract = "The removal of chromium(VI) from saturated sodium chloride (NaCl) solution by strong alkaline anion-exchange fiber (SAAEF) was achieved with column experiments. Factors affecting the adsorption, such as the pH value, loading density, flow rate, and operational temperature, were investigated. The results show that Cr(VI) removal was remarkably pH dependent. The optimal operational conditions were as follows: pH value = 2.0, loading density = 0.12-0.19 g/cm3, room temperature, and flow rate = 6-12 BV/h. The SAAEF column could be regenerated completely by 2% NaOH in saturated NaCl or 2% KOH in 15% KCl as an eluent. Cr(VI) was recycled as Na2Cr2O 7 and K2Cr2O7, respectively. The desorption rate of Cr(VI) reached 98.09%. The adsorption ability of the SAAEFs was stable after repeated use. Overall, the results indicate that SAAEF proved to be an effective material for the adsorption of high concentrations of Cr(VI) from a saturated NaCl solution.",

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author = "Wenqing Wang and Mingyu Li and Qingxuan Zeng",

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AU - Wang, Wenqing

AU - Li, Mingyu

AU - Zeng, Qingxuan

PY - 2012/12/5

Y1 - 2012/12/5

N2 - The removal of chromium(VI) from saturated sodium chloride (NaCl) solution by strong alkaline anion-exchange fiber (SAAEF) was achieved with column experiments. Factors affecting the adsorption, such as the pH value, loading density, flow rate, and operational temperature, were investigated. The results show that Cr(VI) removal was remarkably pH dependent. The optimal operational conditions were as follows: pH value = 2.0, loading density = 0.12-0.19 g/cm3, room temperature, and flow rate = 6-12 BV/h. The SAAEF column could be regenerated completely by 2% NaOH in saturated NaCl or 2% KOH in 15% KCl as an eluent. Cr(VI) was recycled as Na2Cr2O 7 and K2Cr2O7, respectively. The desorption rate of Cr(VI) reached 98.09%. The adsorption ability of the SAAEFs was stable after repeated use. Overall, the results indicate that SAAEF proved to be an effective material for the adsorption of high concentrations of Cr(VI) from a saturated NaCl solution.

AB - The removal of chromium(VI) from saturated sodium chloride (NaCl) solution by strong alkaline anion-exchange fiber (SAAEF) was achieved with column experiments. Factors affecting the adsorption, such as the pH value, loading density, flow rate, and operational temperature, were investigated. The results show that Cr(VI) removal was remarkably pH dependent. The optimal operational conditions were as follows: pH value = 2.0, loading density = 0.12-0.19 g/cm3, room temperature, and flow rate = 6-12 BV/h. The SAAEF column could be regenerated completely by 2% NaOH in saturated NaCl or 2% KOH in 15% KCl as an eluent. Cr(VI) was recycled as Na2Cr2O 7 and K2Cr2O7, respectively. The desorption rate of Cr(VI) reached 98.09%. The adsorption ability of the SAAEFs was stable after repeated use. Overall, the results indicate that SAAEF proved to be an effective material for the adsorption of high concentrations of Cr(VI) from a saturated NaCl solution.

KW - adsorption

KW - fibers

KW - functionalization of polymers

KW - ion exchangers

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IS - 5

ER -

Column adsorption of chromium(VI) by strong alkaline anion-exchange fiber

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