Wool powders used as sorbents to remove Co2+ ions from aqueous solution

Wen, Guiqing, Naik, Radhika, Cookson, Peter, Smith, Suzanne, Liu, Xin and Wang, Xungai 2010, Wool powders used as sorbents to remove Co2+ ions from aqueous solution, Powder technology, vol. 197, no. 3, pp. 235-240.

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Title Wool powders used as sorbents to remove Co2+ ions from aqueous solution
Author(s) Wen, Guiqing
Naik, Radhika
Cookson, Peter
Smith, Suzanne
Liu, Xin
Wang, Xungai
Journal name Powder technology
Volume number 197
Issue number 3
Start page 235
End page 240
Total pages 6
Publisher Elsevier S.A.
Place of publication Lausanne, Switzerland
Publication date 2010-01-25
ISSN 0032-5910
1873-328X
Keyword(s) wool powder
Co2+
sorption
recovery
radioisotope
wool
fibre science
Summary The Co2+ sorption of two wool powders was investigated using its radioisotope 57Co (T1/2=271.8 days and γ=122.1 and 136.5 keV) as a tracer. The effects of the type of buffer, the pH value, the contact time and the initial concentration of Co2+ on the sorption behaviour of wool powders were studied. The Co2+ releasing ability of wool powders and the re-use of wool powders to sorb Co2+ were also examined. The optimum sorption of Co2+ by the powders occurred at pH 8 in phosphate buffer and pH 10 in ammonium sulphate buffer. Fourier-transform infrared spectroscopy (FTIR) was used to study the changes in chemical structure of the wool after exposure to both buffer solutions. Compared to the untreated wool fibre, the fine wool powders showed rapid sorption rates and high sorption capacities for Co2+. Co2+ ions were recovered after exposing the Co2+ loaded wool to HCl (0.1 M) and buffer at pH 3 (glycine/sodium chloride). After releasing Co2+ ions from wool powders, the efficiency of wool powders re-used to sorb Co2+ was 80% of that of the fresh wool powders. It is concluded from this study that wool powder can be used as an efficient sorbent to remove and release Co2+ from solution.
Language eng
Field of Research 091012 Textile Technology
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2010
Copyright notice ©2009 Elsevier B.V. All rights reserved
Persistent URL http://hdl.handle.net/10536/DRO/DU:30032154

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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