Removal of Pb (II) from Synthetic Solution and Paint Industry Wastewater Using Activated Carbon Derived from African Arrowroot (Canna indica) Stem

Table 4

Paint industry wastewater (untreated and treated) characteristics.

Parameters	Unit	Untreated wastewater	Treated wastewater	Maximum limited value (WHO, 2017)
pH	pH unit	5.3	6.5	6.5–9.2
Temperature	°C	20.6	20	40
Turbidity	NUT	255	10	—
BOD5	mg/L	171	25	40
COD	mg/L	2402	150	120
TSS	mg/L	619	138	45
Pb (II)	mg/L	4.6	0.428	0.1
Cu (II)	mg/L	3	0.268	1