Isotherms and Kinetic Studies of Copper Removal from Textile Wastewater and Aqueous Solution Using Powdered Banana Peel Waste as an Adsorbent in Batch Adsorption Systems

Table 2

Textile industry wastewater (untreated and treated) characteristics.

Parameters	Unit	Untreated wastewater	Treated wastewater	Maximum limited value [11]
pH	pH unit	8.6	6.5	6.5–9.2
Temperature	^oC	36.6	20.5	40
Turbidity	NUT	520	10	—
BOD5	mg/L	185.35	45	80
COD	mg/L	612.16	150	150
Cu (II)	mg/L	2.75	0.86	1.0
Cd (II)	mg/L	0.01	Null	0.1
Pb (II)	mg/L	2.02	0.268	0.1
Zn (II)	mg/L	1.7	0.55	5.0