The analysis of heavy metal in leaching liquid of coal

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Cao, Hongmei^1 ; Li, Guanglou^1 ; Zhang, Lu^1

Key Laboratory of Environmental Protection Technology on Water Transport, Ministry of Transport, Tianjin Research Institute of Water Transport Engineering, Tianjin

300456, China^1

关键词: Artificial rainfall;    Hazardous wastes;    pH drop;    Pure water;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012213/pdf
DOI  :  10.1088/1755-1315/113/1/012213

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, heavy metals in coal were extracted by pure water to simulate the leaching effect of natural precipitation or artificial rainfall on outdoor storage of coal. The results show that the leaching liquid pH was slightly declining, and Cu, Zn, Pb, Cd were in μg/L level, far less than the hazardous waste identification standard of GB5085.3-2007. It suggests that leaching liquid was less harmful to environment when coal was immersed by big amount of water. In the case of spray or precipitation less, the pH drop was more obvious, leaching of heavy metals more, and the general elution of the initial dissolution of the most obvious. Although the amount of small but more toxic, the relevant management should be alert to its harmful.