Batch Sorption Experiments: Langmuir and Freundlich Isotherm Studies for the Adsorption of Textile Metal Ions onto Teff Straw (Eragrostis tef) Agricultural Waste

Table 1

Mean concentration (mg/L) with St. dev. of HMs in MAA Garment and Textile Factory effluents.

Sample	Parameters	Ni	Cu	Cd	Cr	Pb
Untreated	Mean ± St. dev.	3.53±0.33	2.54±0.74	1.23±0.22	0.98±0.07	0.12±0.02
Treated	Mean ± St. dev.	0.43±0.19	0.47±0.12	0.02±0.01	0.25±0.05	0.04±0.01
Percentage removed		88%	81.5%	82.9%	74.5%	68.9%