Table 4 Chemical composition of (%weight) of the biosorbents (O: O. mykiss scales; R: R. kutum scales; C: C. glaucum shells) before (B) and after (A) Pb adsorption.

From: Removal of lead from aqueous solutions using three biosorbents of aquatic origin with the emphasis on the affective factors

Compound/Element

Biosorbent

C

R

O

B

A

B

A

B

A

Na2O

1.421

1.193

ND

ND

1.266

1.162

MgO

1.217

1.087

1.039

0.867

ND

ND

P2O5

35.373

34.936

24.499

23.739

ND

ND

SO3

3.637

3.071

9.452

7.973

0.255

0.171

CaO

58.107

56.048

65.010

63.932

97.635

96.913

Sr

0.245

0.229

ND

ND

0.844

0.775

Pb

ND

3.436

ND

3.489

ND

0.979

  1. ND not detectable.
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