1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. Henan Zhongyuan Gold Smelter LLC., Henan 472100, China
3. Nantong Sunshine Graphite Equipment Sci-Tech. LLC., Jiangsu 226000, China
4. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China