A (2,3,7,8,12,13,17,18-Octakis(4-tert-butylbenzylthio)-porphyrazinato)Mg(II)
functionalized quartz crystal microbalance sensor has been developed
for the detection of trace Cd2+ions in water samples. The quartz crystal microbalance results indicated
that the MgPz coated sensor exhibited high sensitivity, stability and
selectivity for the detection of Cd2+ in aqueous solution. The
lowest detection limit can reach 10 mg/ml Cd2+ in aqueous solution, which resulted in the
frequency shift of ~ 150 Hz. The observed adsorption data were analyzed using four adsorption
kinetic models; the Elovich equation, Ritchie’s equation, pseudo first- and
second-order equations. Results show that the linear regression analysis with
respect to pseudo-second-order rate
equation generates a straight line that best fit to the data of adsorption of Cd2+ on Pz film.
Subjects | Engineering |
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Journal Section | Articles |
Authors | |
Publication Date | December 1, 2016 |
Published in Issue | Year 2016 Volume: 17 Issue: 4 |