Study on the Law of Rlease of Heavy Metal from Waste Rock of Dexing Copper Mine

DOI

10.2991/iccahe-16.2016.27How to use a DOI?

Keywords

waste rock; heavy metals; leaching

Abstract

Release law of heavy metals from waste rock are significant to the heavy metal pollution control in nonferrous metal mining-area. We took the waste rock of Dexing Copper mine as the object and carried out the leaching experiment with with simulated acid rain(pH3.0, pH 4.0, pH6.0 and pH8.0) which were conducted to investigate the release law of heavy metals(Cu, Pb, Zn, Cd and As) from waste rock. The results of the experiments were as follows: Waste rocks have relatively acid producing capacity in natural rainfall; with the increase of pH value of added liquid, the electric conductivity reduces gradually, and the amount of heavy metal release reduces. The release process of 5 heavy metal elements (Cu, Pb, Zn, Cd and As) from the waste rocks can be classified into two stages, i.e. rapid release stage and slow release stage. They are the mostly easily to be released and migrated under the action of strong acid with the lowest pH, and the leaching quantity is relatively low if leached by leachate with pH nearly neutral.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qiong Wang
AU  - Huiping Wang
AU  - Qiming Wu
AU  - Lianbi Zhou
PY  - 2016/10
DA  - 2016/10
TI  - Study on the Law of Rlease of Heavy Metal from Waste Rock of Dexing Copper Mine
BT  - Proceedings of the 2016 5th International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2016)
PB  - Atlantis Press
SP  - 156
EP  - 160
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccahe-16.2016.27
DO  - 10.2991/iccahe-16.2016.27
ID  - Wang2016/10
ER  -