Adsorption of Cr(VI) and Speciation of Cr(VI) and Cr(III) in Aqueous Solutions Using Chemically Modified Chitosan

Jun Dai, FengLian Ren and ChunYuan Tao
Additional contact information
Jun Dai: College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China
FengLian Ren: College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China
ChunYuan Tao: College of Chemistry and Chemical Engineering, JiuJiang University, Jiujiang 332005, Jiangxi, China

IJERPH, 2012, vol. 9, issue 5, 1-14

Abstract: A new type of grafting chitosan (CTS) was synthesized using 2-hydroxyethyl- trimethyl ammonium chloride (HGCTS). The adsorption of Cr(VI) on HGCTS was studied. The effect factors on adsorption and the adsorption mechanism were considered. The results indicated that the HGCTS could concentrate and separate Cr(VI) at pH 4.0; the adsorption equilibrium time was 80 min; the maximum adsorption capacity was 205 mg/g. The adsorption isotherm and kinetics were investigated, equilibrium data agreed very well with the Langmuir model and the pseudo second-order model could describe the adsorption process better than the pseudo first-order model. A novel method for speciation of Cr(VI) and Cr(III) in environmental water samples has been developed using HGCTS as adsorbent and FAAS as determination means. The detection limit of this method was 20 ng/L, the relatively standard deviation was 1.2% and the recovery was 99%~105%.

Keywords: grafting chitosan; speciation; flame atomic absorption spectrometry; chromium (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2012
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1660-4601/9/5/1757/pdf (application/pdf)
https://www.mdpi.com/1660-4601/9/5/1757/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:9:y:2012:i:5:p:1757-1770:d:17586

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().