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Table 1 Levels of \({\text{Cd}}_{{({\text{aq}})}}^{ 2+ }\) and \({\text{Pb}}_{{({\text{aq}})}}^{ 2+ }\) in the industrial effluents before adsorptive treatment

From: Adsorption of aqueous Cd(II) and Pb(II) on activated carbon nanopores prepared by chemical activation of doum palm shell

Samplea Cd2+ (mg/l)b Pb2+ (mg/l)b
A (textile industry) 0.66 ± 0.01 0.13 ± 0.01
B (tanning industry) 0.69 ± 0.01 0.39 ± 0.03
C (tanning industry) 0.82 ± 0.02 0.52 ± 0.02
D (packaging materials industry) 0.98 ± 0.01 0.92 ± 0.01
E (insecticide industry) 1.02 ± 0.03 1.18 ± 0.01
F (textile industry) 1.08 ± 0.01 1.32 ± 0.02
G (tanning industry) 1.26 ± 0.02 2.09 ± 0.01
H (textile) 1.30 ± 0.04 2.87 ± 0.02
I (tanning industry) 1.42 ± 0.02 3.26 ± 0.03
J (tannery) 2.06 ± 0.05 4.57 ± 0.03
  1. aThe names of these manufacturing companies are reserved by the authors
  2. bMean + standard deviation