Lead adsorption from aqueous solution onto siderite

ERDEM M., Özverdi A.

Separation and Purification Technology, vol.42, no.3, pp.259-264, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 42 Issue: 3
  • Publication Date: 2005
  • Doi Number: 10.1016/j.seppur.2004.08.004
  • Journal Name: Separation and Purification Technology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.259-264
  • Keywords: lead removal, adsorption, siderite, heavy metal, wastewater treatment
  • Hacettepe University Affiliated: No

Abstract

In this paper, the ability of siderite to remove Pb2+ from aqueous solution by adsorption has been investigated through batch experiments. The Pb2+ adsorption property of the siderite was evaluated as a function of pH, siderite dosage, initial Pb2+ concentration, and temperature. Maximum Pb2+ adsorption yield was obtained to be 99.6% for initial Pb2+ concentration of 50 mg/l at 25 °C and pH 2.97 for 180 min in the presence of 10 g/l siderite. Adsorption data obtained at 25, 30 and 35 °C showed that the adsorption process fitted first-order adsorption rate expression and Langmuir and Freundlich adsorption models. Adsorption capacities of siderite at 25, 30 and 35 °C were found to be 10.32, 12.45 and 14.06 mg Pb2+/g siderite, respectively. Adsorption enthalpy and activation energy values were calculated to be 49.73 and 32.49 kJ/ g mol from the isotherm and kinetic data, respectively. © 2004 Elsevier B.V. All rights reserved.