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Carbonaceous Adsorbents: Design, Fabrication and Application in Water Treatment

Carbonaceous Adsorbents: Design, Fabrication and Application in Water Treatment. Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University. Lunhong Ai. 2010.12.12. Contaminated Rivers and Lakers.

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Carbonaceous Adsorbents: Design, Fabrication and Application in Water Treatment

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  1. Carbonaceous Adsorbents: Design, Fabrication and Application in Water Treatment Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University Lunhong Ai 2010.12.12

  2. Contaminated Rivers and Lakers

  3. Water treatment methods biological treatment coagulation/flocculation membrane filtration ion exchange Water Treatment adsorption advanced oxidation technology

  4. Available adsorbents Biomass Zeolites Adsorbent Clay Functional polymer Nanomaterials Carbonaceous materials

  5. Carbonaceous materials for water treatment

  6. 1. Fabrication of activated carbon/CoFe2O4 composites and their application in water treatment XRD (c) SEM TEM AC/CFO CFO magnetic separation texture property (d) L. Ai et al. / Chemical Engineering Journal 156 (2010) 243–249

  7. Removal of malachite green (MG) Effect of pH Effect of initial concentration regeneration Effect of contact time

  8. 2. Adsorption mechanism of methyl orange (MO) and basic fuchsin (BF) on AC/CFO L. Ai, et. al. / Desalination 262 (2010) 134–140

  9. adsorption kinetics Adsorption kinetics pseudo-first-order model pseudo-second-order model Elovich model ※ adsorption kinetics was best described by the pseudo-second-order model

  10. adsorption kinetics Table 1Kinetic parameters for adsorption of dyes on AC/CFO

  11. adsorption mechanisms Adsorption mechanisms intraparticle diffusion intraparticle diffusion surface adsorption surface adsorption intraparticle diffusion model ※ the adsorption process was controlled by surface adsorption (boundary-layer effect) and intraparticle diffusion.

  12. adsorption mechanisms Boyd kinetic model was generally used to determine the actual rate-controlling step involved in the dye adsorption process. Boydmodel ※ boundary-layer effect mainly governed the rate-limiting process of dye adsorption on AC/CFO

  13. adsorption isotherms Adsorption isotherms Langmuir and Freundlichmodels ※ Dye adsorption behaviors onto AC/CFO could be better represented by the Langmuir model (R2 > 0.99) ※ Monolayer adsorption capacities of MO and BF determined from the Langmuir isotherm are 95.8 and 101.0 mg g−1, respectively

  14. adsorption isotherms Dubinin-Radushkevich (D-R) model For D-R model, the magnitude of E(mean fren energy) is useful for estimating the type of adsorption and if this value is between 8 and 16 kJ mol−1, the adsorption proceeds by surface adsorption. In this study, the E values for MO and BF are calculated to be 11.74 and 12.42 kJ mol−1.

  15. Table 3. Comparison of BF and MO adsorption capacities of various adsorbents

  16. Acknowledgement Financial support from the Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province and Scientific Research Start-up Foundation of China West Normal University (07B005).

  17. Merry Christmas

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