Separation of toxic Pb2+metal from aqueous solution using strongly acidic cation-exchange resin: analytical applications for the removal of metal ions from pharmaceutical formulation

The photocatalytic reduction of Cu (II), Pb (II), Cd (II) and Cr (VI) ions in aqueous solution has been investigated. The photocatalyst utilized was nano titanium dioxide, composed of 80% anatase and 20% rutile; the UV light source was a 15 W UV bulb with a wavelength of 254 nm. The results obtained indicated a reduction efficiency order as follows; Cr6+ > Cu2+ > Pb2+ > Cd2+. It was observed that these results correlate with the respective reduction potentials of the metal ions. The effect of pH on the photocatalytic reduction of the metal ions was also carried out and results obtained indicated that with the exception of Cr (VI) ions, higher percentage removal of metal ions from their aqueous solution was recorded at alkaline pH than at acidic pH. This was attributed to an extensive formation of precipitate by the metal ions at alkaline pH. Kinetic studies revealed that the removal of metal ions from their solutions largely followed the pseudo- first-order kinetics. Therefore, the results of this study will be useful in metal ion removal from industrial waste water using photocatalytic process.

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Studies on the removal of metal ions from aqueous solution using Immobilized Bombax costatum calyx

IOSR Journal of Environmental Science Toxicology and Food Technology ◽

10.9790/2402-0364350 ◽

2013 ◽

Vol 3 (6) ◽

pp. 43-50 ◽

Cited By ~ 1

Author(s):

S.A.Osemeahon S.A.Osemeahon

Keyword(s):

Aqueous Solution ◽

Metal Ions ◽

Removal Of Metal ◽

Removal Of Metal Ions

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Electrochemical removal of metal ions from aqueous solution: a student workshop

Journal of Environmental Monitoring ◽

10.1039/b511142k ◽

2005 ◽

Vol 7 (10) ◽

pp. 943 ◽

Cited By ~ 5

Author(s):

Gerry A. Ottewill ◽

Gavin W. Reade ◽

Sheelagh A. Campbell ◽

Carlos Ponce de Leon ◽

Frank C. Walsh

Keyword(s):

Aqueous Solution ◽

Metal Ions ◽

Removal Of Metal ◽

Removal Of Metal Ions ◽

Electrochemical Removal

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The diffusion of electrolytes in a cation-exchange resin membrane I. Theoretical

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1955.0234 ◽

1955 ◽

Vol 232 (1191) ◽

pp. 498-509 ◽

Cited By ~ 356

Keyword(s):

Aqueous Solution ◽

Activity Coefficient ◽

Cation Exchange ◽

Exchange Resin ◽

Volume Fraction ◽

Cation Exchange Resin ◽

Physical Nature ◽

Concentration Difference ◽

Flow Through ◽

Resin Membrane

An equation for the flux of electrolyte through a water-swollen cation-exchange resin membrane separating two solutions of the same electrolyte at different concentrations is derived on the basis of several assumptions regarding the physical nature of a swollen resinous exchanger. The complete flux equation contains three terms, one determined by the concentration difference across the membrane, another determined by the variation of the activity coefficient of the electrolyte with concentration in the membrane and a third concerned with the rate of osmotic or hydrostatic flow through the membrane. If ions in the resin are transported entirely in an internal aqueous phase, the mobilities required for the flux equation can be related to mobilities in aqueous solution and to the volume fraction of resin in the swollen membrane. The treatment is readily extended to anion exchangers.

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