Al₂O₃ Nanoparticles Promote the Removal of Carbamazepine in Water by Chlorella vulgaris Immobilized in Sodium Alginate Gel Beads

Table 1

Factors and levels of the orthogonal experiment design.

Levels	Factor A	Factor B	Factor C	Factor D
	Al2O3 nanoparticles (g/L)	Sodium alginate concentration (%)	Microalgae density (cell/ml)	CaCl2 concentration (%)
1	0.5	1	1 × 10^6	1
2	1.0	1.6	2 × 10^6	2
3	1.5	2.4	3 × 10^6	3