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The actual AFPW sample used in this study was collected from Daqing oilfield located in Heilongjiang province, China. The wastewater was allowed to settle for 24 h, the floating oil was skimmed off using filter paper, and then preserved at 4 °C before use. The wastewater quality parameters are listed in Table 1.

Table 1

Characteristics of the AFPW used in the present study

ParameterUnitValue
pH 8.7 
COD mg/L 4,264 
O&G mg/L 156 
Viscosity mPa•s 1.48 
Conductivity mS/cm 3.52 
Turbidity FTU 317 
CO32– mg/L 538 
HCO3 mg/L 4,263 
Total dissolved solids mg/L 8,346 
TSS mg/L 224 
PAM mg/L 330 
ParameterUnitValue
pH 8.7 
COD mg/L 4,264 
O&G mg/L 156 
Viscosity mPa•s 1.48 
Conductivity mS/cm 3.52 
Turbidity FTU 317 
CO32– mg/L 538 
HCO3 mg/L 4,263 
Total dissolved solids mg/L 8,346 
TSS mg/L 224 
PAM mg/L 330 

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