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Complexons as reagents for demetallization of contaminated sediments

  • Inorganic Synthesis and Industrial Inorganic Chemistry
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Abstract

Effect of various complexons [ethylenediaminetetraacetic acid, nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetra(methylenephosphonic acid), nitrilotris(methylenephosphonic acid)] on the sorption of heavy metal cations Cu2+, Ni2+, Pb2+, Zn2+ by crystalline and amorphous Fe(III), Al(III), and Mn(IV) oxides and hydroxides was studied. The sorption processes in systems constituted by a metal cation, complexon, and sediment were analyzed in terms of the theory of surface complexation. The factors affecting the processes of remobilization/immobilization of heavy metals under the action of complexons were studied. The desorbing effect of complexons becomes stronger with increasing stability and decreasing sorption capacity of complexonates formed in solution. A flow chart of recovery of heavy metals from contaminated sediments with ethylenediaminetetraacetic acid was developed.

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Authors and Affiliations

  1. Udmurt State University, ul. Universitetskaya 1, Izhevsk, Udmurt Republic, 426034, Russia

    T. N. Kropacheva, A. S. Antonova, Yu. V. Rabinovich & V. I. Kornev

Authors
  1. T. N. Kropacheva
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  2. A. S. Antonova
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  3. Yu. V. Rabinovich
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  4. V. I. Kornev
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Correspondence to T. N. Kropacheva.

Additional information

Original Russian Text © T.N. Kropacheva, A.S. Antonova, Yu.V. Rabinovich, V.I. Kornev, 2014, published in Zhurnal Prikladnoi Khimii, 2014, Vol. 87, No. 10, pp. 1421–1428.

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Kropacheva, T.N., Antonova, A.S., Rabinovich, Y.V. et al. Complexons as reagents for demetallization of contaminated sediments. Russ J Appl Chem 87, 1422–1429 (2014). https://doi.org/10.1134/S107042721410005X

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  • DOI: https://doi.org/10.1134/S107042721410005X

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