ADSORPTION KINETICS OF Cd2+ IONS ONTO MgPz THIN FILM
Abstract
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.
Keywords
References
- [1] Gumpu MB, Sethuraman S, Krishnan UM, Rayappan JBB. A review on detection of heavy metal ions in water – An electrochemical approach. Sensor Actuat B-Chem 2015; 213: 515-533.
- [2] Cherian S, Gupta RK, Mullin BC, Thundat T. Detection of heavy metal ions using protein-functionalized microcantilever sensors. Biosens Bioelectron 2003; 19: 411-416.
- [3] Kadirvelu K, Namasivayam C. Agricultural by-products as metal adsorbents: Sorption of lead (II) from aqueous solutions onto coirpith carbon. Environ Technol 2000; 21: 1091-1097.
- [4] Cao Z, Guo J, Fan X, Xu J, Fan Z, Du B. Detection of heavy metal ions in aqueous solution by P(MBTVBC-co-VIM)-coated QCM sensor. Sensor Actuat B-Chem 2011; 157: 34-41.
- [5] Dekhil AB, Hannachi Y, Ghorbel A, Boubaker T. Removal of Lead and Cadmium Ions From Aqueous Solutions Using Dried Marine Green Macroalga (Caulerpa racemosa). Int J Environ Res 2011; 5(3): 725-732.
- [6] Hamilton MA, Rode PW, Merchant ME, Sneddon J. Determination and comparison of heavy metals in selected seafood, water, vegetation and sediments by inductively coupled plasma-optical emission spectrometry from an industrialized and pristine waterway in Southwest Louisiana. Microchem J 2008; 88: 52-55.
- [7] Bibby A, Mercier L. Mercury (II) ion adsorption behavior in thiol-functionalized mesoporous silica microspheres. Chem Mater 2002; 14: 1579-1591.
- [8] Fanata K, Chandravanshi BS. Differential pulse anodic stripping voltammetric determination of cadmium(II) with N-p-chlorophenylcinnamohydroxamic acid modified carbon paste electrode. Electroanalysis 2001; 13: 484-492.
- [9] Abdunasser ME, Hillman AR, Ryder KS, Glidle A. Quartz crystal microbalance determination of trace metal ions in solution. J Electroanal Chem 2007; 599: 275-287.
- [10] Ju JF, Syu MJ, Teng HS, Chou SK, Chang YS. Preparation and identification of - cyclodextrin polymer thin film for quartz crystal microbalance sensing of benzene, toluene, and p-xylene. Sensor Actuat B-Chem 2008; 132: 319-326.