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Activated carbon from Ceiba pentandra hulls, an agricultural waste, as an adsorbent in the removal of lead and zinc from aqueous solutions.
Waste Manag. 2008; 28(5):849-58.WM

Abstract

The ability of low-cost activated carbon prepared from Ceiba pentandra hulls, an agricultural waste material, for the removal of lead and zinc from aqueous solutions has been investigated. In the batch tests experimental parameters were studied, including solution pH, contact time, adsorbent dose and initial metal ions concentration. The adsorbent exhibited good sorption potential at pH 6.0. Maximum removal of lead (99.5%) and of zinc (99.1%) with 10 g/l of sorbent was observed at 50 mg/L sorbate concentration. Removals of about 60-70% occurred in 10 min, and equilibrium was attained at around 50 min for both metals. The functional groups (CO, SO,-OH) present on the carbon surface were responsible for the adsorption of metal ions. The adsorption parameters were analysed using both the Freundlich and Langmuir models. The data are better fitted by the Freundlich isotherm as compared to Langmuir model, and the adsorption capacities for lead and zinc were 25.5 and 24.1 mg/g, respectively. Kinetics of adsorption obeyed a second order rate equation and the rate constant was found to be 2.71 x 10(-2) and 2.08 x 10(-2) g/mg/min for lead and zinc, respectively. The desorption studies were carried out using dilute HCl, and the effect of HCl concentration on desorption was studied. Maximum desorptions of 85% for lead and 78% for zinc were attained with 0.15 M HCl.

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Authors+Show Affiliations

Rao MM
Environmental and Analytical Chemistry Division, Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, India.
Rao GP
No affiliation info available
Seshaiah K
No affiliation info available
Choudary NV
No affiliation info available
Wang MC
No affiliation info available

MeSH

AdsorptionAgricultureCarbonCeibaHydrogen-Ion ConcentrationLeadRefuse DisposalSpectroscopy, Fourier Transform InfraredTime FactorsWaterWater Pollutants, ChemicalZinc

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17416512

Citation

Rao, M Madhava, et al. "Activated Carbon From Ceiba Pentandra Hulls, an Agricultural Waste, as an Adsorbent in the Removal of Lead and Zinc From Aqueous Solutions." Waste Management (New York, N.Y.), vol. 28, no. 5, 2008, pp. 849-58.
Rao MM, Rao GP, Seshaiah K, et al. Activated carbon from Ceiba pentandra hulls, an agricultural waste, as an adsorbent in the removal of lead and zinc from aqueous solutions. Waste Manag. 2008;28(5):849-58.
Rao, M. M., Rao, G. P., Seshaiah, K., Choudary, N. V., & Wang, M. C. (2008). Activated carbon from Ceiba pentandra hulls, an agricultural waste, as an adsorbent in the removal of lead and zinc from aqueous solutions. Waste Management (New York, N.Y.), 28(5), 849-58.
Rao MM, et al. Activated Carbon From Ceiba Pentandra Hulls, an Agricultural Waste, as an Adsorbent in the Removal of Lead and Zinc From Aqueous Solutions. Waste Manag. 2008;28(5):849-58. PubMed PMID: 17416512.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Activated carbon from Ceiba pentandra hulls, an agricultural waste, as an adsorbent in the removal of lead and zinc from aqueous solutions. AU - Rao,M Madhava, AU - Rao,G P Chandra, AU - Seshaiah,K, AU - Choudary,N V, AU - Wang,M C, Y1 - 2007/04/09/ PY - 2006/06/12/received PY - 2006/11/07/revised PY - 2007/01/19/accepted PY - 2007/4/10/pubmed PY - 2008/10/29/medline PY - 2007/4/10/entrez SP - 849 EP - 58 JF - Waste management (New York, N.Y.) JO - Waste Manag VL - 28 IS - 5 N2 - The ability of low-cost activated carbon prepared from Ceiba pentandra hulls, an agricultural waste material, for the removal of lead and zinc from aqueous solutions has been investigated. In the batch tests experimental parameters were studied, including solution pH, contact time, adsorbent dose and initial metal ions concentration. The adsorbent exhibited good sorption potential at pH 6.0. Maximum removal of lead (99.5%) and of zinc (99.1%) with 10 g/l of sorbent was observed at 50 mg/L sorbate concentration. Removals of about 60-70% occurred in 10 min, and equilibrium was attained at around 50 min for both metals. The functional groups (CO, SO,-OH) present on the carbon surface were responsible for the adsorption of metal ions. The adsorption parameters were analysed using both the Freundlich and Langmuir models. The data are better fitted by the Freundlich isotherm as compared to Langmuir model, and the adsorption capacities for lead and zinc were 25.5 and 24.1 mg/g, respectively. Kinetics of adsorption obeyed a second order rate equation and the rate constant was found to be 2.71 x 10(-2) and 2.08 x 10(-2) g/mg/min for lead and zinc, respectively. The desorption studies were carried out using dilute HCl, and the effect of HCl concentration on desorption was studied. Maximum desorptions of 85% for lead and 78% for zinc were attained with 0.15 M HCl. SN - 0956-053X UR - https://www.unboundmedicine.com/medline/citation/17416512/Activated_carbon_from_Ceiba_pentandra_hulls_an_agricultural_waste_as_an_adsorbent_in_the_removal_of_lead_and_zinc_from_aqueous_solutions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0956-053X(07)00055-4 DB - PRIME DP - Unbound Medicine ER -