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Table 3 Physicochemical characteristics of effluent before and after treatment with adsorbents GA and GAM

From: Nanosilver-decorated nanographene and their adsorption performance in waste water treatment

S. no

Water quality parameters

Textile effluent

Before treatment

After treatment with GA

After treatment with GAM

1.

Temperature (°C)

29.9

29.9

29.9

2.

Colour, hazen

158

7

17

3.

Odour

Decaying fruit flavour

No characteristic odour

No characteristic odour

4.

pH at 27 °C

9.10

9.25

8.19

5.

Turbidity, NTU

51

3

8

6.

Total alkalinity, as CaCO3 (mg/l)

620

1220

160

7.

Total hardness, as CaCO3 (mg/l)

750

550

110

8.

Biochemical oxygen demand, (mg/l), 27 °C, 3 days

1334

407

79.5

9.

Chemical oxygen demand (COD) (mg/l)

3625

897

274

10.

Chlorides, as Cl− (mg/l)

700

550

170

11.

Total dissolved solids (mg/l) (evaporation method)

2270

2130

560