Funding for this research was provided by:
Fundamental Research Funds for the Central Universities, China University of Geosciences (CUG170671)
Research Fund Program of Key Laboratory of Biometallurgy, Ministry of Education, Central South University (MOEKLB1702)
Article History
Received: 23 November 2018
Revised: 18 December 2018
Accepted: 19 December 2018
First Online: 7 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.