Acknowledgements This research was supported by the National Natural Science Foundation of China (41773089), postdoctoral foundation for MG from Chinese PD science foundation (2017M610506), PD research funding plan in Hunan and central South University (185690), the Shanghai Tongji Gao Tingyao Environment Protection Science and Technology Development Foundation, Opening Foundation of the Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution (No. 2015CNERC-CTHMP).