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Table 2

Adsorption effect of different filtration media on organic matter

Raw water concentration (mg/l)Modified garnet media
Unmodified garnet media
Quartz sand media
Concentration (after adsorption) (mg/l)Removal rate (%)Concentration (after adsorption) (mg/l)Removal rate (%)Concentration (after adsorption) (mg/l)Removal rate (%)
4.82 2.32 51.87 4.6 4.56 4.6 4.56 
10.63 4.88 54.09 10.3 3.10 10.32 2.92 
20.25 8.05 60.25 19.7 2.72 19.73 2.57 
29.86 11.01 63.13 29.1 2.55 29.13 2.44 
39.62 15.35 61.26 38.52 2.78 38.6 2.57 
Raw water concentration (mg/l)Modified garnet media
Unmodified garnet media
Quartz sand media
Concentration (after adsorption) (mg/l)Removal rate (%)Concentration (after adsorption) (mg/l)Removal rate (%)Concentration (after adsorption) (mg/l)Removal rate (%)
4.82 2.32 51.87 4.6 4.56 4.6 4.56 
10.63 4.88 54.09 10.3 3.10 10.32 2.92 
20.25 8.05 60.25 19.7 2.72 19.73 2.57 
29.86 11.01 63.13 29.1 2.55 29.13 2.44 
39.62 15.35 61.26 38.52 2.78 38.6 2.57 

Adsorption conditions: raw water volume = 100 ml, filter material volume = 50 ml, adsorption time = 3 h, speed = 100 r/min, temperature = 26 °C, pH = 7.

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