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Table 5 Recovery results of heavy metal ions in wastewater samples

From: A new sorbent based on MWCNTs modification for separation/preconcentration of trace amounts of Cd(II), Cr(III), Cu(II), Ni(II), and Pb(II) and their determination by flame atomic absorption spectrometry

Metallic ion Wastewater (Copper factory, Sarcheshmeh, Rafsanjan) Waste water (sewage treatment plant, Yazd)
Added Found Recovery (%) Added Found Recovery (%)
Pb(II) (μg mL−1)a 0 2.20 (±0.14) 0 0.46 (±0.10)
5.0 7.11 (±0.21) 98.2 5.0 5.24 (±0.16) 95.6
10.0 12.24 (±0.17) 100.4 10.0 10.31 (±0.08) 98.5
Ni(II) (μg mL−1)a 0 1.10 (±0.11) 0 0.29 (±0.10)
5.0 6.12 (±0.15) 100.4 5.0 5.37 (±0.12) 101.6
10.0 11.08 (±0.12) 99.8 10.0 10.36 (±0.14) 100.7
Cd(II) (μg mL−1)a 0 0.50 (±0.09) 0 0.42 (±0.13)
5.0 5.44 (±0.14) 98.8 5.0 5.41 (±0.16) 99.8
10.0 10.52 (±0.19) 100.2 10.0 10.47 (±0.11) 100.5
Cu(II) (μg mL−1)a 0 6.21 (±0.13) 0 0.59 (0.10)
5.0 11.13 (±0.15) 98.4 5.0 5.52 (±0.17) 98.6
10.0 16.10 (±0.18) 98.9 10.0 10.64 (±0.15) 100.5
Cr(III) (μg mL−1)a 0 0.57 (±0.10) 0 0.56 (±0.17)
5.0 5.60 (±0.15) 100.6 5.0 5.50 (±0.18) 98.8
10.0 10.47 (±0.15) 99.0 10.0 10.60 (±0.13) 100.4
  1. aMean ± standard deviation (n = 5)