Evaluation of the Physicochemical Behavior of Waste Water Treatment Polyelectrolytes with Metal Ions — Oak Academic Publishing
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Evaluation of the Physicochemical Behavior of Waste Water Treatment Polyelectrolytes with Metal Ions
Graduate and Research Center of the Technical Institute of Tijuana, Tijuana, México
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Graduate and Research Center of the Technical Institute of Tijuana, Tijuana, México; Centre for Research and Technological Development in Electrochemistry, Tijuana, México
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Graduate and Research Center of the Technical Institute of Tijuana, Tijuana, México
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Graduate and Research Center of the Technical Institute of Tijuana, Tijuana, México
1 Graduate and Research Center of the Technical Institute of Tijuana, Tijuana, México
2 Graduate and Research Center of the Technical Institute of Tijuana, Tijuana, México; Centre for Research and Technological Development in Electrochemistry, Tijuana, México
3 Graduate and Research Center of the Technical Institute of Tijuana, Tijuana, México
4 Graduate and Research Center of the Technical Institute of Tijuana, Tijuana, México
In this paper is describing the physicochemical behavior of polyelectrolytes (PE s ) used in waste water treatment with mono-, di- and trivalent metal ions as K + , Mg 2+ , Zn 2 + , Fe 3+ , Sn 2+ , Cd 2+ , Pb 2+ , Cu 2+ , Ni 2+ , Al 3 + and Cr 3 + . 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 Al 3 + and Mg 2+ while the Flocculant has the highest affinity for Sn 2+ followed by Zn 2+ and Mg 2+ . 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.
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