Funding for this research was provided by:
national natural science foundation of china (41671285)
the National Key Research and Development Program of China (2016YFC0501707,2016YFC0402401)
the Science and Technology Innovation Team of Degradation and Unused Kand Reclamation Engineering (2016KCT-23)
Article History
Received: 7 June 2018
Revised: 19 October 2018
Accepted: 9 January 2019
First Online: 21 January 2019
Compliance with ethical standards
:
: The authors declare that they have no competing financial interests.