New Sustainable Biosorbent Based on Recycled Deoiled Carob Seeds: Optimization of Heavy Metals Remediation

Table 1

Process factors and their levels.

Factors	Levels
	Low (−)	High (+)
A. pH	4	6
B. Biosorbent dose (g/l)	1	3
C. Initial concentration (mg/l)	50	100
D. Treating agent	HCl	NaOH