Removal of Sulfur Dioxide from Flue Gas Using the Sludge Sodium Humate

Table 2

The SO₂ absorption using different absorption solution^a.

Sample	Maximum absorption efficiency of SO2 (%)	DTHE (s)	𝑄 (mmol)
SHA-Na	98.32	4357	0.946
NaOH	81.04	478	0.080
H2O	78.52	240	0.038
Activated sludge	90.32	408	0.075
Excess sludge	92.40	840	0.166

^a𝐶₀: 2500 ppm; 𝑞: 0.12 m³/h; absorption solution: 100 mL; O₂: 5 vol%; 298 K; ambient pressure.