Effects of Cu(II) on the Adsorption Behaviors of Cr(III) and Cr(VI) onto Kaolin
Joint Authors
Liu, Juanjuan
Wu, Xiaolong
Hu, Yandi
Dai, Chong
Peng, Qin
Liang, Dongli
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-08-07
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The adsorption of Cr(III) or Cr(VI) in the absence and presence of Cu(II) onto kaolin was investigated under pH 2.0–7.0.
Results indicated that the adsorption rate was not necessarily proportional to the adsorption capacity.
The solutions’ pH values played a key role in kaolin zeta potential ( ζ ) , especially the hydrolysis behavior and saturation index of heavy metal ions.
In the presence of Cu(II), q m i x C r ( I I I ) reached the maximum adsorption capacity of 0.73 mg·g−1 at pH 6.0, while the maximum adsorption capacity for the mixed Cr(VI) and Cu(II) system ( q m i x C r ( V I ) ) was observed at pH 2.0 (0.38 mg·g−1).
Comparing the adsorption behaviors and mechanisms, we found that kaolin prefers to adsorb hydrolyzed products of Cr(III) instead of Cr3+ ion, while adsorption sites of kaolin surface were occupied primarily by Cu(II) through surface complexation, leading to Cu(II) inhibited Cr(VI) adsorption.
Moreover, Cr(III) and Cr(VI) removal efficiency had a positive correlation with distribution coefficient K d .
Cr(III) and Cr(VI) removal efficiency had a positive correlation with distribution coefficient K d and that of adsorption affinities of Cr(III) or Cr(VI) on kaolin was found to be K d Cr(III) < K d Cr(III)-Cu(II) and K d Cr(VI) > K d Cr(VI)-Cu(II).
American Psychological Association (APA)
Liu, Juanjuan& Wu, Xiaolong& Hu, Yandi& Dai, Chong& Peng, Qin& Liang, Dongli. 2016. Effects of Cu(II) on the Adsorption Behaviors of Cr(III) and Cr(VI) onto Kaolin. Journal of Chemistry،Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1107623
Modern Language Association (MLA)
Liu, Juanjuan…[et al.]. Effects of Cu(II) on the Adsorption Behaviors of Cr(III) and Cr(VI) onto Kaolin. Journal of Chemistry No. 2016 (2016), pp.1-11.
https://search.emarefa.net/detail/BIM-1107623
American Medical Association (AMA)
Liu, Juanjuan& Wu, Xiaolong& Hu, Yandi& Dai, Chong& Peng, Qin& Liang, Dongli. Effects of Cu(II) on the Adsorption Behaviors of Cr(III) and Cr(VI) onto Kaolin. Journal of Chemistry. 2016. Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1107623
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1107623