Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 209, Issue -, Pages 285-292Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2012.01.022
Keywords
Solid phase extraction; Silica gel; Preconcentration; On-line recovery; Palladium
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Funding
- University Grant Commission (UGC), Delhi, India
- University of Delhi and Department of Science and Technology, Government of India under PURSE
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A novel, highly selective, efficient and reusable chelating resin, diphenyldiketone-monothiosemicarbazone modified silica gel, was prepared and applied for the on-line separation and preconcentration of Pd(II) ions in catalytic converter and spiked tap water samples. Several parameters like effect of pH, sample volume, flow rate, type of eluent, and influence of various ionic interferences, etc. were evaluated for effective adsorption of palladium at trace levels. The resin was found to be highly selective for Pd(II) ions in the pH range 4-5 with a very high sorption capacity of 0.73 mmol/g and preconcentration factor of 335. The present environment friendly procedure has also been applied for large-scale extraction by employing the use of newly designed reactor in which on-line separation and preconcentration of Pd can be carried out easily and efficiently in short duration of time. (C) 2012 Elsevier B.V. All rights reserved.
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