Funding for this research was provided by:
the National Key Project of Research and Development Plan (No. 2016YFC1402504)
the Foundation of Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation, Hubei Polytechnic University (No. 2017101)
Article History
Received: 11 April 2019
Accepted: 12 July 2019
First Online: 23 July 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.