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Table 2 physicochemical changes in the culture media at the end of incubation (5 days)

From: Impacts of cerium oxide nanoparticles on bacterial community in activated sludge

  Initial Conc. Control (%) S_A (%) S_B (%) S_C (%) S_D (%)
Phosphate (mg/L) 7.35 89.2 13.81 6.74 2.93 1.83
Nitrate (mg/L) 31.23 99.6 75 53.6 47.32 35.15
COD (mg/L) 593.5 95.98 89.74 71.21 54.18 39.45
EC (µS/cm) 717 53.64 10.32 6.93 4.72 2.81
DO (mg/L) 6.2 98.87 65.09 44.96 29.9 20.43
pH 7.21 12.9 0.21 0.38 0.28 0.26