Removal of Zinc from Aqueous Solution by Optimized Oil Palm Empty Fruit Bunches Biochar as Low Cost Adsorbent

Table 5

Model validation.

Model desirability	HTT ()	HR ()	RT ()	Biochar yield (%)		Adsorption capacity (mg/g)
				Predicted	Experimental	Predicted	Experimental
0.934	615	8	128	25.28	25.49	14.98	15.18