Synthesize of dendritic fibrous nano-silica functionalized by cysteine and its application as advanced adsorbent

Figures & data

Scheme 1. Synthesized procedure of KCC-1-NH₂-Cys.

Figure 1. TEM images of KCC-1, KCC-1-NH₂, and KCC-1-NH₂-Cys.

Figure 2. (A-C) CVs, DPVs, and LSVs of GCE in the presence of Cd²⁺ (2.5 mM) before and after incubation with KCC-1-NH₂-Cys (0.02 g). Sweep rate of CV is 50 mV/s. Sweep rate of CV is 100 mV/s. Sweep rate of LSV is 100 mV/s. Modulation time = 0.05, Interval time = 0.25, Modulation amplitude= 0.025.

Figure 3. (AC) CVs, DPVs, and LSVs of GCE in the presence of Cd²⁺ (2.5 mM) after incubation with KCC-1-NH₂-Cys (0.02 g) in different incubation time (15, 30, 45, 60 min). All of conditions and parameters are similar to Figure 2.

Scheme 2. Schematic representation of cations removal from aqueous solution using KCC-1-NH₂-Cys.

Figure 4. DPVs of GCE in the presence of different concentration of Cd²⁺ (2.5, 5, 7.5, 10, 20 mM) after incubation with KCC-1-NH₂-Cys (0.02 g). Modulation time = 0.05, Interval time = 0.25, Modulation amplitude= 0.025.

Table 1. Amount of ions in river-water and local natural ground water samples analyzed by proposed method.

Sample	Found
Pb^2+
River-water (near of ground water)	0.5 µM
Local natural ground water	0.8 µM
Cd^2+
River-water (near of ground water)	0.06 µM
Local natural ground water	0.01 µM
Ag ^+
River-water (near of ground water)	1 µM
Local natural ground water	1.1 µM