NDLI: The metal ions release and microstructure of coal gangue corroded by acid-based chemical solution

Content Provider	Springer Nature Link
Author	Xue, Qiang Lu, Haijun Zhao, Ying Liu, Lei
Copyright Year	2013
Abstract	Cationic release, surface microstructure, and pore size distribution of coal gangue during the acid-based chemical solution corrosion were investigated. Results showed that during the interactions of gangue and chemical solution, the acidity and alkalinity of mixed solutions first decrease quickly, and then stabilize. The concentrations of released Ca, Mg, and Fe in gangue decrease with the decreasing acidity of the chemical solution, and produce a trend of increase-to-decrease with the increase in alkalinity. The release of Ca, Mg, and Fe is significantly influenced by the weathering of gangue. Ca and Mg achieve a concentrated release during the first day, whereas the release of Fe occurs gradually within the first 10 days. The microstructure detection result indicates that the surface structure of fresh gangue is exposed to obvious corrosion by acid-based chemical solutions, with higher extent of corrosion in acidic solution than that in alkaline solution. The micropore is relatively developed, and the secondary and middle pores increase gradually. The specific surface area is increased. Furthermore, the pore size distribution of abundance of micropore and middle pore shows a series of inconsistent spectra instead of a continuous wide-flat spectrum.
Starting Page	3235
Ending Page	3244
Page Count	10
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	71
Issue Number	7
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-08-31
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coal gangue Chemical solution Pollutant release Microstructure Pore size distribution Geology
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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