Treatment

Sewage

Cu

Cr

Zn

Pb

Selectivity Sequence

T1

Sorption

0.022

0.140

0.058

0.043

Cr > Zn > Pb > Cu

Retention

0.195

29.257

0.237

0.183

Cr > Cu > Zn > Pb

T2

Sorption

0.022

0.059

0.094

0.034

Zn > Cr > Pb > Cu

Retention

0.190

26.443

0.276

0.266

Cr > Zn > Pb > Cu

T3

Sorption

0.036

0.051

0.100

0.061

Zn > Pb > Cr > Cu

Retention

0.177

34.087

0.316

0.221

Cr > Zn > Pb > Cu