Abatement of Azo Dye from Wastewater Using Bimetal-Chitosan

Table 3

Variation of solution pH during OII removal by chitosan and BCP (OII concentration 200 mg/L, reaction time 10 min, and BCP and chitosan dose 1 mg/L).

Initial solution pH	Final pH
	Chitosan	BCP
3	3.03	5.26
4	4.09	6.61
5	5.08	7.42
6	6.03	8.42
7	7.08	9.53
8	8.08	9.85
9	9.1	10.8
10	10.02	11