Table 9 Comparison of Cd2+ adsorption capacity (Qm) with other reported adsorbents.

From: Optimization of biochar preparation from the stem of Eichhornia crassipes using response surface methodology on adsorption of Cd2+

Adsorbents

Cd2+ adsorption capacity (mg/g)

References

Canna indica biochar (300 °C)

63.32

60

Canna indica biochar (400 °C)

105.78

 

Canna indica biochar (500 °C)

188.79

 

Canna indica biochar (600 °C)

140.01

 

Ipomoea fistulosa biochar (350 °C)

55.5

61

Ipomoea fistulosa biochar (400 °C)

71.43

 

Ipomoea fistulosa biochar (500 °C)

62.5

 

Ipomoea fistulosa biochar (550 °C)

41.67

 

Activated biochar (ABC)

72.43

 

Raw attapulgite (APT)

10.38

62

MgO modified APT (MAP/APT)

121.14

 

Rice straw biochar (400 °C)

37.24

63

Rice straw biochar (700 °C)

65.40

 

Palm oil mill sludge biochar

46.2

64

Staw stem

84.79

This study

ECSBC

142,59

This study

OECSBC

186.18

This study

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