JEP  Vol.4 No.3 , March 2013
Evaluation of the Physicochemical Behavior of Waste Water Treatment Polyelectrolytes with Metal Ions
Abstract: In this paper is describing the physicochemical behavior of polyelectrolytes (PEs) used in waste water treatment with mono-, di- and trivalent metal ions as K+, Mg2+, Zn2+, Fe3+, Sn2+, Cd2+, Pb2+, Cu2+, Ni2+, Al3+ and Cr3+. A coagulant polyelectrolyte Poly(vinyl sulfate) potassium salt (PVSK), and a commercial available Flocculant Trident 2756, were used as models for the study. The colloidal titration UV-Vis spectroscopy technique was successfully implemented in order to evaluate the complexation of PEs with Toluidine Blue O (OTB) and the ability of different metal ions to displace the OTB from the PE-OTB complex and form the PE-metal ion complex. From the experiments was concluded that PVSK has a high affinity for Al3+ and Mg2+ while the Flocculant has the highest affinity for Sn2+ followed by Zn2+and Mg2+. The absorbance profiles of polyelectrolyte-OTB complex (Absorbance vs. Metal/PE) were used to calculate association constants. On the other hand, the mass balance of OTB and its absorbance profiles were used to calculate the association constants of polyelectrolyte-metal ion complexes. Thus metal ions with the highest affinities have the highest association constant. Metal ions with the highest affinities present the highest values of association constant.
Cite this paper: E. Maldonado, M. Guzmán, G. Pina-Luis and A. Ochoa-Terán, "Evaluation of the Physicochemical Behavior of Waste Water Treatment Polyelectrolytes with Metal Ions," Journal of Environmental Protection, Vol. 4 No. 3, 2013, pp. 270-279. doi: 10.4236/jep.2013.43032.

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