|
|
|
| The heavy mental leaching rules and influence mechanism of different particle size of tin mining waste rock |
|
|
|
|
Abstract In order to obtain the leaching rule of different particle size of waste rock from tin mining zone, a dynamic simulation test was carried out. Three metal ions, Pb、Zn and As were investigated in the test. Concentrations of heavy metals leached were increasing in the early stage of the test. As leaching time extending, the concentrations of heavy metals leveled off then began to decrease. The influence of the particle size on leaching shown that smaller particle size led to better leaching result. X-ray diffraction、SEM、EDS、Surface Area and Pore Size analysis indicated that the leaching process was primarily influenced by particle size in the early stage of leaching. The solute flow was convective. During the later phase, leaching was influenced by particle size, porosity, specific surface, surface structure and morphologic distribution. In this period, the solute transport was influenced by convection transport and molecular diffusion.
|
|
Received: 31 July 2013
|
|
|
|
| [1] |
CHEN Huan-Yu, LIU Jing-Qing, WEI Zong-Yuan, ZHANG Hui-Hui, HE Xiao-Fang, ZHOU Xiao-Yan, QIU Shang-De, HU Bao-Lan, LOU Li-Ping. Radial differences in contaminant distribution in large-diameter pipe scales of main pipelines in drinking water distribution system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2706-2712. |
|
|
|
|
