Adsorption Studies on the Removal of Textile Effluent over Two Natural Eco-Friendly Adsorbents

Table 5

Comparison of wastewater parameters before and after treatment.

Parameters	Wastewater before treatment	Wastewater after treatment		Elimination percentage (%)
		M1	M2	M1	M2
COD (mg O2·L^−1)	440	49.8	89.16	88.68	79.73
Cd (mg·L^−1)	0.0484	0.031	0.039	35.95	19.42
Cr (mg·L^−1)	0.2469	0.1499	0.188	39.43	23.57
Cu (mg·L^−1)	0.1451	0.1041	0.1189	28.27	18.62
Zn (mg·L^−1)	1.2963	0.78	0.9894	39.53	24.03