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Electroplating wastewater
 
Brief introduction of electroplating industry

Electroplating technology plays important role in modern manufacturing and processing industry. And it becomes more and more important in electronic, micro-electronic and communication industry.

And electroplating technology has been improved greatly. But there are problems of low management level and large pollution. And these problems are urgently needed to be addressed.

 
Electroplating technology, exhaust waer and source:
Plating types: nickel plating, copper plating, chromeplate, zinc plating, lead plating, silver plating, tinning and gold plating
 
 
Source of exhaust water and harms
Type
Hazardous substance
PH
chromium
Cr2O72-, Cr3+,
acidity
cyanogen
CuCN,Cd(CN)2, KCN,NaCN,【Cd(CN)42
【Cu(CN)3】-【Au(CN)2】-【Ag(CN)2】-
alkalinity
cadmium
CdcCl2, Cd(CN), CdO, 【Cd(CN)42-
alkalinity, acidity
nickel
NiSO4, Nicl2, H2BO3,
acidity
copper
CuSO4, Cu2P2O7, 【CU(P2O7)26+
acidity, alkalinity
zinc
ZnO,ZnCl2, ZnSO4,NH4Cl
acidity, alkalinity
gold
【Au(cn)2】-, KCN
alkalinity
silver
【Ag(cn)2】, KCN
alkalinity
acid
HNO3, HCL, H2SO4, H3PO4, HF
acidity
alkaliferous
NaOH,NaCO3, Na3PO4
alkalinity
 

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