Table 3: Comparison of adsorption capacity of Saudi clay with other adsorbents reported in previous works.

AdsorbentMaximum adsorbed amount (mg/g)References
Ag+Cu++

Zeolite33.2[12]
Activated carbon25[46]
Peat10.86.2[10]
Spent activated carbon13[33]
Red mud5.3[34]
Expanded perlite08.62[45]
Natural zeolite8.69[31]
Clay12.84[11]
Shells of wheat17.42[8]
Bulgarian clay3.11[25]
Expanded perlite0.80.18[4]
Saudi clay63.232.36This work