Funding for this research was provided by:
Scientific research fund project of Henan University of China (2015YBZR032)
National Natural Science Foundation of China (9117002)
Major State Basic Research Development Program of China (2012CB114301)
The National Natural Science Foundation of China (21571051)
Major science and technology project in Henan province of China (0)
The project of scientific and technological breakthrough in Jiyuan of China (170220)
Open Fund of Key Laboratory for Monitoring and Remediation of Heavy Metal polluted Soil of Henan Province.
Received: 22 September 2017
Accepted: 16 April 2018
First Online: 30 May 2018
: The authors declare that they have no competing interests.
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