Microbiological and Toxicological Assessment of Pharmaceutical Wastewater from the Lagos Megacity, Nigeria

Table 1

Physicochemical characteristics of the pharmaceutical effluents.

Parameter	Effluent
Color      PtCo	30
Turbidity      FAU	16
pH	5.0
Dissolved oxygen (mg/L)	4.70
Biological oxygen demand (mg/L)	36.0
Chemical oxygen demand (mg/L)	72.0
Conductivity (S/cm)	320
Total dissolved solids (mg/L)	160
Salinity ()	0
Temperature (°C)	26.65
Chloride (mg/L)	66
Sulfate (mg/L)	5.0
Total hardness (mg/L)	180
Calcium (mg/L)	120
Magnesium (mg/L)	60
Sodium (mg/L)	11.50
Oil and grease (mg/L)	0.10
Total carbonate alkalinity (mg/L)	0
Nitrate (mg/L)	0.18
Nitrite (mg/L)	0.01
Phosphate (mg/L)	1.96
Hydrogen sulfide (mg/L)	0
TOC (%)	4.40
Iron (mg/L)	36.45
Manganese (mg/L)	20.0
Copper (mg/L)	0.82
Zinc (mg/L)	0.88
Lead (mg/L)	0.22
Nickel (mg/L)	0.26
Chromium (mg/L)	0.31
Mercury (mg/L)	ND
Arsenic (mg/L)	0.04
Barium (mg/L)	0.88
Cobalt (mg/L)	0.04

ND: not detected.