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Gold Science and Technology ›› 2016, Vol. 24 ›› Issue (3): 100-105.doi: 10.11872/j.issn.1005-2518.2016.03.100

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Advanced Treatment of Low Concentrations of Precious Metals Wastewater by Electrochemical Method

LEI Siming1，2，SONG Yonghui1，2#br#   

  1. 1.School of Metallurgical and Engineering，Xi’an University of Architecture and Technology，Xi’an   710055， Shaanxi，China；
    2.Key Laboratory of Gold and Resource of Shaanxi Province，Xi’an   710055，Shaanxi，China
  • Received:2016-01-11 Revised:2016-03-22 Online:2016-06-28 Published:2016-10-08

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Abstract:

Advanced treatment of the precious metals barren solution by the electrochemical process used self-made coal base material as the electrode，the effects of the voltage，time，pH and temperature for ions removal rate were mainly studied，the shape and the load substances of the plate were analyzed by scanning electron microscopy and energy spectrum（SEM-EDS）. The results show that，with the time and the temperature increased，the removal rate of each ions in the solution were increased gradually，but when the voltage increases the ions removal increased first and decreased afterwards，and the optimum condition was 1.6 V，yet the increase of pH was not favorable for the process.Under the condition of the voltage of 1.6 V，temperature of 50 ℃，time of 6 h with the initial pH，the ion removal rates of palladium can reach 99.32%，the platinum 97.13%，and both the gold and the ruthenium nearly can be seen as completely removed.Study shows that the electrochemical method can achieve the purpose of advanced treatment precious metal barren solution and recovery the precious metals.In the process of electrochemical，the ions in solution interacted by electrodeposition and electric absorption process，and the former occupy dominant effect.

Key words: precious metals, barren solution, electric deposition, electric absorption

CLC Number: 

  • TF831

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