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Study interaction between humic acids and metal ions using fluorescence quenching approach

机译:使用荧光猝灭法研究腐殖酸与金属离子之间的相互作用

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The interaction of humic acids (HA) isolated from oxidized and brown coals with copper, nickel, and cadmium ions is investigated. The complexation constant of HA with heavy metal ions is determined using the fluorescence quenching method. It is shown that preliminary mechanic activation of humic-containing substances increases the binding coefficients of HA with copper and nickel ions in 1.5 to 3.5 times, as compared to cadmium ions, for which the values of the fluorescence quenching constant K_(SV) decrease. This is due not only to structural changes in HA after the mechanic activation, but also to the nature of metal ions.
机译:研究了从氧化煤和褐煤分离出的腐殖酸(HA)与铜,镍和镉离子的相互作用。 HA与重金属离子的络合常数使用荧光猝灭法测定。结果表明,与镉离子相比,含腐殖质物质的初步机械活化将HA与铜和镍离子的结合系数提高了1.5到3.5倍,为此镉的荧光猝灭常数K_(SV)的值降低。这不仅是由于机械活化后HA中的结构变化,还归因于金属离子的性质。

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