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- W2798269779 abstract "Carbon nano¯bers (CNFs) were synthesized by using a safe and less hazardous method, comparedto using °oating catalysts in chemical vapor deposition (CVD) process. This process usedC2H2 as carbon source and oil palm kernel shell-based powdered activated carbon (PAC) as cheapsolid substrate. Use of nickel (Ni2þ) impregnated PAC as ¯xed substrate for the synthesis of CNFis one of the novelties of the research work accomplished by the authors. The PAC–CNFs porousnanocomposite product was used for the sorption of lead ions (Pb2þ) from synthetic aqueoussolution. Kinetics of Pb2þ adsorption and isotherms were investigated by varying initial concentrationof lead and contact time. PAC–CNFs were found to remove Pb2þ better at acidic pHof about 5.5. Langmuir and Freundlich isotherms were applied to the sorption equilibrium data to¯nd the best ¯tted model. Langmuir isotherm model with R2 ¼ 0:965 ¯tted the adsorption databetter than the Freundlich isotherm. The kinetic processes of Pb2þ adsorption on CNFs wereinvestigated by applying di®erent kinetic models, namely zero-order, pseudo-¯rst-order andpseudo-second-order. The pseudo-second-order rate equation exhibited the best results withR2 ¼ 0:999, qe¼ 74:79 (mg/g) and K2¼ 0:029 (min . g=mg). The novel nanocomposite productseemed to have the potential to remove Pb2þ ions from aqueous solution." @default.
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- W2798269779 date "2015-02-01" @default.
- W2798269779 modified "2023-09-23" @default.
- W2798269779 title "Lead sorption by carbon nanofibers grownon powdered activated carbon — kineticsand equilibrium" @default.
- W2798269779 hasPublicationYear "2015" @default.
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