Figure 9 | Scientific Reports

Figure 9

From: Accelerated Sorption Diffusion for Cu(II) Retention by Anchorage of Nano-zirconium Dioxide onto Highly charged Polystyrene Material

Figure 9

Comparison of breakthrough curves of Cu(II) uptake in fixed-bed columns. (a) The column adsorption curves of NZO-PS and PS; (adsorption: influent Cu(II) = 3 mg/L, Ca(II) = 200 mg/L, Mg(II) = Na(I) = 100 mg/L, pH = 5.5–6.2, SLV = 0.75 m/h, EBCT = 4 min); (b) the wastewater from electroplating industry (initial Cu(II) = 0.7–0.9 mg/L, SLV = 0.75 m/h, EBCT = 4 min); (c) batch sorption-degeneration tests onto NZO-PS at 303 K. (sorbent: 2 g/L, adsorption: Cu(II) = 50 mg/L, Ca(II) = 200 mg/L, Mg(II) = Na(I) = 100 mg/L, pH = 5.5 = 6.3; regenerant: 20 mL−0.5% HCl + 10% NaCl for 5 h at 298K) (d) influences of various feeding velocities on Cu(II) removal performance onto NZO-PS and NZO-PC.

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