Metal ion

Concentration before adsorption (mg/L)

Rice hull activated carbon (RHAC)

Commercial activated carbon (CAC)

Concentration after adsorption (mg/L)

Removal percentage (%)

Concentration after adsorption (mg/L)

Removal percentage (%)

Al(III)

0.583

0.061

89.474

0.137

78.204

0.456

0.015

96.635

0.150

67.154

0.363

0.044

87.960

0.143

60.478

Fe(III)

3.478

0.106

96.952

0.557

83.985

0.726

0.056

92.287

0.145

80.028

0.477

0.047

90.147

0.142

70.231

2.908

0.722

75.172

0.108

96.286