Efficient removal of sulfur hexafluoride (SF6) through reacting with recycled electroplating sludge

Zhang, Jia, Zhou, Ji Zhi, Liu, Qiang, Qian, Guangren and Xu, Zhi Ping (2013) Efficient removal of sulfur hexafluoride (SF6) through reacting with recycled electroplating sludge. Environmental Science and Technology, 47 12: 6493-6499. doi:10.1021/es400553e


Author Zhang, Jia
Zhou, Ji Zhi
Liu, Qiang
Qian, Guangren
Xu, Zhi Ping
Title Efficient removal of sulfur hexafluoride (SF6) through reacting with recycled electroplating sludge
Formatted title
Efficient removal of sulfur hexafluoride (SF6) through reacting with recycled electroplating sludge
Journal name Environmental Science and Technology   Check publisher's open access policy
ISSN 0013-936X
1520-5851
Publication date 2013-06-18
Sub-type Article (original research)
DOI 10.1021/es400553e
Volume 47
Issue 12
Start page 6493
End page 6499
Total pages 7
Place of publication United States
Publisher American Chemical Society
Collection year 2014
Language eng
Formatted abstract
This paper reports that recycled electroplating sludge is able to efficiently remove greenhouse gas sulfur hexafluoride (SF6). The removal process involves various reactions of SF6 with the recycled sludge. Remarkably, the sludge completely removed SF6 at a capacity of 1.10 mmol/g (SF6/sludge) at 600 °C. More importantly, the evolved gases were SO2, SiF4, and a limited amount of HF, with no toxic SOF4, SO2F2, or SF4 being detected. These generated gases can be readily captured and removed by NaOH solution. The reacted solids were further found to be various metal fluorides, thus revealing that SF6 removal takes place by reacting with various metal oxides and silicate in the sludge. Moreover, the kinetic investigation revealed that the SF6 reaction with the sludge is a first-order chemically controlled process. This research thus demonstrates that the waste electroplating sludge can be potentially used as an effective removal agent for one of the notorious greenhouse gases, SF6.
Keyword Walled carbon nanotubes
Decomposition products
Plasma environment
Atmospheric SF6
Sewage-sludge
Adsorption
Purification
Oxides
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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