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Gold Science and Technology ›› 2018, Vol. 26 ›› Issue (4): 535-542.doi: 10.11872/j.issn.1005-2518.2018.04.535

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Research and Practice of Deep Purification and Desalination Reuse Technology for Complex Gold Wastewater

Shaoyuan SHI1,3(),Junqiang WANG2,Yongchun WANG2,Guodong WANG2,Manman ZHANG3,Zhi SUN1   

  1. 1 Beijing Engineering Research Center of Process Pollution Control，Division of Environment Technology and Engi-neering，Key Laboratory of Green Process and Engineering，Institute of Process Engineering，Chinese Academy of Sciences，Beijing 100190，
    2Lingbao Gold Group Co.，Ltd.，Lingbao 472500，Henan，China
    3Zhengzhou Institute of Emerging Industrial Technology，Zhengzhou 450000，Henan，China
  • Received:2018-04-25 Revised:2018-07-16 Online:2018-10-10 Published:2018-10-17

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Abstract:

The serious environmental pollution is caused by gold hydrometallurgy wastewater due to containing large amount of inorganic salts，various heavy metals，ammonia nitrogen，cyanide and COD，etc.，but the target discharge of wastewater cannot be achieved by the present treatment technologies.A series of key technologies for advanced treatment and desalination reuse of gold hydrometallurgical wastewater have been developed，including waste acid purification and resource，valuable metal recovery and heavy metal removal，cyanide recovery by hydrophobic membrane，organic matter removal by advanced oxidation，electrodialysis desalination，etc.The key technologies were integrated for collaborative control and resource utilization of multiple pollutants，to establish the engineering package of multi pollutant collaborative control and resource for gold hydrometallurgy wastewater and to form a complete technology and equipment.The application feasibility of related technologies was verified by field test.The industrial application of the technology has been promoted for achieving the goal of advanced treatment and near zero discharge of gold hydrometallurgical wastewater.

Key words: gold hydrometallurgy, wastewater advanced treatment, waste acid resource, cyanide recovery, advanced oxidation, electrodialysis desalination, near zero-emissions

CLC Number: 

  • X703

Fig.1

Process for treating acid wastewater from gold hydrometallurgy"

Fig.2

Process for treating cyanide-contained wastewater from gold hydrometallurgy"

Fig.3

Cathodic photograph and product SEM images of swirling electrolysis from gold hydrometallurgy （a）acid wastewater；（b）cyanide-contained wastewater"

Fig.4

Photograph and SEM images of efficient adsorbent for heavy metal removal"

Table 1

Effluent index of heavy metal-contained wastewater treated with highly effective adsorbent"

污染物名称 处理后污染物浓度/（μg·L-1） 生活饮用水卫生标准值/（mg·L-1）
As 1 0.01
Hg 3 0.05
Se 5 0.01
Tl 0.1 0.0001
Cd 4 0.005
Cr（VI） 5 0.05

Fig.5

Process for recovering cyanide from hydrophobic membrane for cyanide containing wastewater treatment"

Fig.6

High efficiency catalyst and degradation pathways of organic compound by photocatalysis and ozonation oxidation "

Fig.7

Properties characterization and antifouling properties comparison of original and surface modified membranes"

Fig.8

Pilot scale test on electrodialysis desalination of cyanide-contained wastewater and acidic wastewater from gold Hydrometallurgy"

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