Notice of RetractionExperimental of Flocculation-Sedimentation Aids in Drainage Treatment from Copper Election Process

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

At present, the neutralization and precipitation treatment is mostly applied in acid mine drainage treatment, which is widely used and with low running cost and so forth, but biggest problem is that the sediments float in the secondary settling tank and settle down difficultly, then the effluent always can´t comply with the wastewater discharge standard. The acid mine drainage samples were from a copper mine in China, the paper was about acid mine drainage treatment. The Zeta potential and particle sizes analysis were synthetically used in studying why flocculation-sedimentation aids could speed up flocs in acid mine drainage treatment. Experimental results shown that the pH was adjusted to 8.0, 0.8mg/L cationic polymer flocculant polyacrylamide(PAM) and 2.5g/L flocculation-sedimentation aids, and flocculation and precipitation was improved effectively, precipitation rate was accelerated and incompact sediments disappeared. Alter treated, the concentration of metal ions and suspend solid(SS) in effluent could comply with the wastewater discharge standard.