Influence of surface-active substances on the redox processes of metal ions: a contribution to the speciation analysis of metals in aquatic systems
作者： Marta Plavšií , Božena Ćosović
DOI: 10.1016/0003-2670(94)85060-7
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摘要: Abstract The cathodic (reduction) and anodic (oxidation) waves of different heavy metal ions (Cu, Cd, In, Pb, Tl) were investigated in the presence non-ionic surfactant Triton X-100 humic acid (HA) by electrochemical methods (differential-pulse voltammetry a.c. voltammetry). adsorption complexation properties organic substances also examined. Conclusions about possible influences matter on speciation analysis bulk solution mercury / water interface are drawn. For Cu predominant reaction with HA will be even at lower pH (1.6). In neutral alkaline solutions Cd Pb complexed either or electrode surface. At inhibition oxidoreduction processes occurred owing to surface coverage electrode. Indium present higher (3.84), whereas hydrophobic/hydrophilic effects play an important role interfacial region. Owing low tendency form complexes small size thallium ion, its not influenced HA.
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