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Table 3

Turbidity, COD and extractable oil contents of the supernatants and the sediment volumes

No.	Added materials	Turbidity (NTU)	COD (mg L⁻¹)	Extractable oil content (mg L⁻¹)	Sediment volume (mL)
–	–	333	357	26	–
1	100 mg L⁻¹ Bent. + 20 mg L⁻¹ Al³⁺ + 0,5 mg L⁻¹ PE	6	158	4	15
2	100 mg L⁻¹ Bent. + HTABr + 20 mg L⁻¹ Al³⁺ + 0,5 mg L⁻¹ PE	6	156	5	13
3	500 mg L⁻¹ Bent. + HTABr + 20 mg L⁻¹ Al³⁺ + 0,5 mg L⁻¹ PE	3	156	4	11
4	2,000 mg L⁻¹ Bent. + HTABr + 20 mg L⁻¹ Al³⁺ + 0,5 mg L⁻¹ PE	4	154	4	20

No.	Added materials	Turbidity (NTU)	COD (mg L⁻¹)	Extractable oil content (mg L⁻¹)	Sediment volume (mL)
–	–	333	357	26	–
1	100 mg L⁻¹ Bent. + 20 mg L⁻¹ Al³⁺ + 0,5 mg L⁻¹ PE	6	158	4	15
2	100 mg L⁻¹ Bent. + HTABr + 20 mg L⁻¹ Al³⁺ + 0,5 mg L⁻¹ PE	6	156	5	13
3	500 mg L⁻¹ Bent. + HTABr + 20 mg L⁻¹ Al³⁺ + 0,5 mg L⁻¹ PE	3	156	4	11
4	2,000 mg L⁻¹ Bent. + HTABr + 20 mg L⁻¹ Al³⁺ + 0,5 mg L⁻¹ PE	4	154	4	20