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Adsorption of Pb(II) and Pb(II)-citric acid on sawdust activated carbon: Kinetic and equilibrium isotherm studies.
J Hazard Mater. 2009 Jan 30; 161(2-3):1506-13.JH

Abstract

The removal of Pb(II) and Pb(II)-citric acid (Pb(II)-CA) from aqueous solutions by sawdust activated carbon (SDAC) was investigated. The higher adsorptive removal of Pb(II) from aqueous solutions containing Pb(II)-CA than Pb(II) only was observed due to the presence of CA in the former system. The mechanism of adsorption process was studied by conducting pH as well as kinetic studies. Batch adsorption experiments were conducted to study the effect of adsorbent dose, initial concentration and temperature for the removal of Pb(II) from Pb(II) only and Pb(II)-CA aqueous systems. The adsorption was maximum for the initial pH in the range of 6.5-8.0 and 2.0-5.0 for Pb(II) and Pb(II)-CA, respectively. The solution pH, zero point charge (pH(zpc)) and species distribution of Pb(II) and Pb(II)-CA were found to play an important role in the adsorption of Pb(II) and Pb(II)-CA onto SDAC from water and wastewaters. SDAC exhibited very high adsorption potential for Pb(II) ions in presence of CA than when Pb(II) ions alone were present. The kinetic and equilibrium adsorption data were well modeled using pseudo-first-order kinetics and Langmuir isotherm model, respectively.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Sreejalekshmi KG
Department of Chemistry, University of Kerala, Kariavattom Post, Trivandrum 695581, India.
Krishnan KA
No affiliation info available
Anirudhan TS
No affiliation info available

MeSH

AdsorptionCarbonCharcoalCitric AcidHydrogen-Ion ConcentrationIonsKineticsLeadModels, ChemicalSolutionsTemperatureTime FactorsWaste Disposal, FluidWaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18550276

Citation

Sreejalekshmi, K G., et al. "Adsorption of Pb(II) and Pb(II)-citric Acid On Sawdust Activated Carbon: Kinetic and Equilibrium Isotherm Studies." Journal of Hazardous Materials, vol. 161, no. 2-3, 2009, pp. 1506-13.
Sreejalekshmi KG, Krishnan KA, Anirudhan TS. Adsorption of Pb(II) and Pb(II)-citric acid on sawdust activated carbon: Kinetic and equilibrium isotherm studies. J Hazard Mater. 2009;161(2-3):1506-13.
Sreejalekshmi, K. G., Krishnan, K. A., & Anirudhan, T. S. (2009). Adsorption of Pb(II) and Pb(II)-citric acid on sawdust activated carbon: Kinetic and equilibrium isotherm studies. Journal of Hazardous Materials, 161(2-3), 1506-13. https://doi.org/10.1016/j.jhazmat.2008.05.002
Sreejalekshmi KG, Krishnan KA, Anirudhan TS. Adsorption of Pb(II) and Pb(II)-citric Acid On Sawdust Activated Carbon: Kinetic and Equilibrium Isotherm Studies. J Hazard Mater. 2009 Jan 30;161(2-3):1506-13. PubMed PMID: 18550276.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption of Pb(II) and Pb(II)-citric acid on sawdust activated carbon: Kinetic and equilibrium isotherm studies. AU - Sreejalekshmi,K G, AU - Krishnan,K Anoop, AU - Anirudhan,T S, Y1 - 2008/05/07/ PY - 2006/9/22/received PY - 2007/11/14/revised PY - 2008/5/2/accepted PY - 2008/6/14/pubmed PY - 2009/3/4/medline PY - 2008/6/14/entrez SP - 1506 EP - 13 JF - Journal of hazardous materials JO - J Hazard Mater VL - 161 IS - 2-3 N2 - The removal of Pb(II) and Pb(II)-citric acid (Pb(II)-CA) from aqueous solutions by sawdust activated carbon (SDAC) was investigated. The higher adsorptive removal of Pb(II) from aqueous solutions containing Pb(II)-CA than Pb(II) only was observed due to the presence of CA in the former system. The mechanism of adsorption process was studied by conducting pH as well as kinetic studies. Batch adsorption experiments were conducted to study the effect of adsorbent dose, initial concentration and temperature for the removal of Pb(II) from Pb(II) only and Pb(II)-CA aqueous systems. The adsorption was maximum for the initial pH in the range of 6.5-8.0 and 2.0-5.0 for Pb(II) and Pb(II)-CA, respectively. The solution pH, zero point charge (pH(zpc)) and species distribution of Pb(II) and Pb(II)-CA were found to play an important role in the adsorption of Pb(II) and Pb(II)-CA onto SDAC from water and wastewaters. SDAC exhibited very high adsorption potential for Pb(II) ions in presence of CA than when Pb(II) ions alone were present. The kinetic and equilibrium adsorption data were well modeled using pseudo-first-order kinetics and Langmuir isotherm model, respectively. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/18550276/Adsorption_of_Pb_II__and_Pb_II__citric_acid_on_sawdust_activated_carbon:_Kinetic_and_equilibrium_isotherm_studies_ DB - PRIME DP - Unbound Medicine ER -