Research Article
Trace Metal Detection in Aqueous Reservoirs Using Stilbene Intercalated Layered Rare-Earth Hydroxide Tablets
Table 1
Sorption of Pb2+ and Cu2+ with different stilbene intercalated lanthanide-containing layered double hydroxides and their physicochemical parameters.
| | Stilbene intercalated lanthanide-containing LDH material | BET SA (m2/g) | Langmuir SA (m2/g) | Pore vol. (cm3/g) | Pore size (nm) | Max. adsorp. Pb2+ (mmol/g) | Max. adsorp. Cu2+ (mmol/g) |
| | Dy2(OH)5(C28H20O6S2)0.5.nH2O | 32.111 | 450.965 | 0.065 | 8.154 | 5.672 ± 0.21 | 6.133 ± 0.01 | | Gd2(OH)5(C28H20O6S2)0.5.nH2O | 31.475 | 189.204 | 0.062 | 7.872 | 3.23 ± 0.11 | 3.678 ± 0.05 | | Nd2(OH)5(C28H20O6S2)0.5.nH2O | 28.233 | 102.596 | 0.085 | 12.065 | 2.612 ± 0.32 | 3.089 ± 0.09 | | Sm2(OH)5(C28H20O6S2)0.5.nH2O | 22.276 | 92.444 | 0.039 | 7.086 | 2.143 ± 0.25 | 2.321 ± 0.06 | | Yb2(OH)5(C28H20O6S2)0.5.nH2O | 10.134 | 62.507 | 0.030 | 11.938 | 1.872 ± 0.12 | 2.043 ± 0.04 | | Er2(OH)5(C28H20O6S2)0.5.nH2O | 2.249 | 32.261 | 0.012 | 21.968 | 0.987 ± 0.34 | 1.542 ± 0.02 | | Tb2(OH)5(C28H20O6S2)0.5.nH2O | 11.356 | 12.327 | 0.040 | 14.134 | 0.541 ± 0.55 | 1.123 ± 0.10 | | Eu2(OH)5(C28H20O6S2)0.5.nH2O | 1.878 | 2.959 | 0.005 | 10.464 | 0.523 ± 0.12 | 0.341 ± 0.02 |
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Maximum adsorption time = 45 minutes; solution pH = 4–8; Temperature = 298 K; SA = Surface area; vol. = Volume |
