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A 0.1 g samples of the multifunctionalized polysiloxane- immobilized ligand systems, P-(NN-S)-TEA-NN and P-(NN-S)-TEA-NNN, were shaken with 25 cm? of 0.02 M aqueous solution of the appropriate metal ions (Cu’*, Ni**, Co?*, and Pb*) using 100 cm? polyethylene bottles. Determination of the metal ion concentration was carried The immobilized-polysiloxane (diamine-thiol)-tetrakis(N- 3,6-diazahexaylacetamide), P-(NN-S)-TEA-NNN was pre- pared in a similar method as previously reported [35]. The immobilized-polysiloxane (diamine-thiol) tetraethylacetate, P-(NN-S)-TEA (5.0 g), was refluxed with diethylenetriamine (17.0 g, 0.16 mol) in 50 mL anhydrous toluene with stirring at 110 °C for 48 h. Then, the mixture was cooled, filtered off, Mean of three measurments. The maximum error is 0.9% for carbon and 0.04% for hydrogen, nitrogen, and sulfur Metal uptake experiments Preparation of immobilized-polysiloxane (diamine-thiol)-tetrakis (N-3,6-diazahexaylacetamide), P-(NN-S)-TEA-NNN and washed with ethanol. The product P-(NN-S)-TEA-NNN was dried in a vacuum oven at 80 °C for 12 h.

Figure 2 A 0.1 g samples of the multifunctionalized polysiloxane- immobilized ligand systems, P-(NN-S)-TEA-NN and P-(NN-S)-TEA-NNN, were shaken with 25 cm? of 0.02 M aqueous solution of the appropriate metal ions (Cu’*, Ni**, Co?*, and Pb*) using 100 cm? polyethylene bottles. Determination of the metal ion concentration was carried The immobilized-polysiloxane (diamine-thiol)-tetrakis(N- 3,6-diazahexaylacetamide), P-(NN-S)-TEA-NNN was pre- pared in a similar method as previously reported [35]. The immobilized-polysiloxane (diamine-thiol) tetraethylacetate, P-(NN-S)-TEA (5.0 g), was refluxed with diethylenetriamine (17.0 g, 0.16 mol) in 50 mL anhydrous toluene with stirring at 110 °C for 48 h. Then, the mixture was cooled, filtered off, Mean of three measurments. The maximum error is 0.9% for carbon and 0.04% for hydrogen, nitrogen, and sulfur Metal uptake experiments Preparation of immobilized-polysiloxane (diamine-thiol)-tetrakis (N-3,6-diazahexaylacetamide), P-(NN-S)-TEA-NNN and washed with ethanol. The product P-(NN-S)-TEA-NNN was dried in a vacuum oven at 80 °C for 12 h.

Related Figures (14)

Fig. 1 FTIR spectra of a P-(NN-S)-TEA/CTAB, b P-(NN-S)-TEA, c P-(NN-S)-TAA, d P-(NN-S)-TEA-NN, and e P-(NN-S)-TEA-NNN ligand systems
Fig. 1 FTIR spectra of a P-(NN-S)-TEA/CTAB, b P-(NN-S)-TEA, c P-(NN-S)-TAA, d P-(NN-S)-TEA-NN, and e P-(NN-S)-TEA-NNN ligand systems
Fig.2 XPS survey of the immobilized-polysiloxane a P-(NN-S)- TEA/CTAB, b P-(NN-S)-TEA, ¢ P-(NN-S)-TAA, d P-(NN-S)-TEA- NN, and e P-(NN-S)-TEA-NNN ligand systems The elemental analysis is given in Table 1. It was found that carbon percentage decreases from 21.45 to 17.23% and the
Fig.2 XPS survey of the immobilized-polysiloxane a P-(NN-S)- TEA/CTAB, b P-(NN-S)-TEA, ¢ P-(NN-S)-TAA, d P-(NN-S)-TEA- NN, and e P-(NN-S)-TEA-NNN ligand systems The elemental analysis is given in Table 1. It was found that carbon percentage decreases from 21.45 to 17.23% and the
The maximum error is 10% given the semi-quantitative aspect of the technique Figure 3a—e shows the fitted Cls carbon of P-(NN-S)-TEA/CTAB, P-(NN-S)-TEA, P-(NN-S)-TAA, P-(NN- S)-TEA-NN and P-(NN-S)-TEA-NNN, respectively
The maximum error is 10% given the semi-quantitative aspect of the technique Figure 3a—e shows the fitted Cls carbon of P-(NN-S)-TEA/CTAB, P-(NN-S)-TEA, P-(NN-S)-TAA, P-(NN- S)-TEA-NN and P-(NN-S)-TEA-NNN, respectively
Fig. 3 Fitted Cls XPS core level spectrum of a P-(NN-S)-TrA/CTAB, b P-(NN-S)-TEA, ¢ P-(NN-S)-TAA, d P-(NN-S)-TEA-NN, and e P-(NN- S)-TrA-NNN
Fig. 3 Fitted Cls XPS core level spectrum of a P-(NN-S)-TrA/CTAB, b P-(NN-S)-TEA, ¢ P-(NN-S)-TAA, d P-(NN-S)-TEA-NN, and e P-(NN- S)-TrA-NNN
Fig.4 Fitted Nls XPS core level spectrum of a P-(NN-S)-TEA/CTAB, b P-(NN-S)-TEA, ¢ P-(N-S)-TrAA, d P-(N-S)-TrEA-NN, and e P-(N-S)- TrEA-NNN
Fig.4 Fitted Nls XPS core level spectrum of a P-(NN-S)-TEA/CTAB, b P-(NN-S)-TEA, ¢ P-(N-S)-TrAA, d P-(N-S)-TrEA-NN, and e P-(N-S)- TrEA-NNN
Table 4 Nitrogen components of the immobilized-polysiloxane ligand systems the optimum conditions for maximum metal ion uptake capacity. Quantitative determination of metal uptake capacity (mmol M’*/g) by the polysiloxane materials has been investigated for Cut, Co”, Ni?*+ and Pb?* metal ions.
Table 4 Nitrogen components of the immobilized-polysiloxane ligand systems the optimum conditions for maximum metal ion uptake capacity. Quantitative determination of metal uptake capacity (mmol M’*/g) by the polysiloxane materials has been investigated for Cut, Co”, Ni?*+ and Pb?* metal ions.
Fig.5 TGA and DTG thermograms of a P-(NN-S)-TEA, b P-(NN-S)-TAA, c¢ P-(NN-S)-TEA-NN, and d P-(NN-S)-TEA-NNN
Fig.5 TGA and DTG thermograms of a P-(NN-S)-TEA, b P-(NN-S)-TAA, c¢ P-(NN-S)-TEA-NN, and d P-(NN-S)-TEA-NNN
Fig.7 Uptake of Co”+ ions by a P-(NN-S)-TAA, b P-(NN-S)-TEA- NN, and ¢ P-(NN-S)-TEA-NNN ligand systems ([Co**]=0.02 M, dose of adsorbents =4 g/L and contacting time = 24 h) Fig.6 Uptake of Cu’+ ions by a P-(NN-S)-TAA, b P-(NN-S)-TEA- NN, and ¢ P-(NN-S)-TEA-NNN ligand systems ({Cu°*]=0.02 M, dose of adsorbents =4 g/L and contacting time = 24 h)
Fig.7 Uptake of Co”+ ions by a P-(NN-S)-TAA, b P-(NN-S)-TEA- NN, and ¢ P-(NN-S)-TEA-NNN ligand systems ([Co**]=0.02 M, dose of adsorbents =4 g/L and contacting time = 24 h) Fig.6 Uptake of Cu’+ ions by a P-(NN-S)-TAA, b P-(NN-S)-TEA- NN, and ¢ P-(NN-S)-TEA-NNN ligand systems ({Cu°*]=0.02 M, dose of adsorbents =4 g/L and contacting time = 24 h)
Fig.8 Uptake of Ni** ions by a P-(NN-S)-TAA, b P-(NN-S)-TEA- NN, and ¢ P-(NN-S)-TEA-NNN ligand systems ((N’°*]=0.02 M, dose of adsorbents =4 g/L and contacting time = 24 h)
Fig.8 Uptake of Ni** ions by a P-(NN-S)-TAA, b P-(NN-S)-TEA- NN, and ¢ P-(NN-S)-TEA-NNN ligand systems ((N’°*]=0.02 M, dose of adsorbents =4 g/L and contacting time = 24 h)
Table 5 Maximum metal uptake capacity of P-(NN-S)-TAA, P-(NN- S)-TEA-NN, and P-(NN-S)-TEA-NNN divalent pollutant metal ions (Cu2*, Co?*, Ni?*, and Pb?*) from aqueous solution, where copper and lead ions have the highest removal.
Table 5 Maximum metal uptake capacity of P-(NN-S)-TAA, P-(NN- S)-TEA-NN, and P-(NN-S)-TEA-NNN divalent pollutant metal ions (Cu2*, Co?*, Ni?*, and Pb?*) from aqueous solution, where copper and lead ions have the highest removal.
Fig.9 Uptake of Pb?* ions by a P-(NN-S)-TAA, b P-(NN-S)-TEA- NN, and ¢ P-(NN-S)-TEA-NNN ligand systems ({Pb**] =0.02 M, dose of adsorbents =4 g/L and contacting time = 24 h)
Fig.9 Uptake of Pb?* ions by a P-(NN-S)-TAA, b P-(NN-S)-TEA- NN, and ¢ P-(NN-S)-TEA-NNN ligand systems ({Pb**] =0.02 M, dose of adsorbents =4 g/L and contacting time = 24 h)
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