Removal of lead (II) from synthetic and batteries wastewater using agricultural residues in batch/column mode

Original Paper

Abstract

The present article explores the ability of five different combinations of two adsorbents (Arachis hypogea shell powder and Eucalyptus cameldulensis saw dust) to remove Pb(II) from synthetic and lead acid batteries wastewater through batch and column mode. The effects of solution pH, adsorbent dose, initial Pb(II) concentration and contact time were investigated with synthetic solutions in batch mode. The Fourier transform infrared spectroscopy study revealed that carboxyl and hydroxyl functional groups were mostly responsible for the removal of Pb(II) ions from test solutions. The kinetic data were found to follow pseudo-second-order model with correlation coefficient of 0.99. Among Freundlich and Langmuir adsorption models, the Langmuir model provided the best fit to the equilibrium data with maximum adsorption capacity of 270.2 mg g−1. Column studies were carried out using lead battery wastewater at different flow rates and bed depths. Two kinetic models, viz. Thomas and Bed depth service time model, were applied to predict the breakthrough curves and breakthrough service time. The Pb(II) uptake capacity (qe = 540.41 mg g−1) was obtained using bed depth of 35 cm and a flow rate of 1.0 mL min−1 at 6.0 pH. The results from this study showed that adsorption capacity of agricultural residues in different combinations is much better than reported by other authors, authenticating that the prepared biosorbents have potential in remediation of Pb-contaminated waters.

Keywords

Lead acid batteries wastewater Arachis hypogea Eucalyptus cameldulensis Biosorbents Bed depth service model Thomas model 

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Copyright information

© Islamic Azad University (IAU) 2013

Authors and Affiliations

  1. 1.Department of ChemistryMaharishi Markandeshwar UniversityAmbalaIndia
  2. 2.School of Chemistry and BiochemistryThapar UniversityPatialaIndia

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