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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Measurement of Binding Constant between Chemical Compound and Humic Acid

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1996, v.9 no.1, pp.91-97
Yook, Keun-Sung
Kim, Yong-Hwa
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Abstract

The extent of binding(<TEX>$K_B$</TEX>) between chemical compound and humic acid was measured as an indicator of decrease in toxicity. From the experimental <TEX>$K_B$</TEX> and estimated <TEX>$K_B$</TEX> calculated from <TEX>$K_{ow}$</TEX>, no reduction of toxicity among test chemicals in aquatic systems were predicted except P,P'-DDT. The effect of humic acid on aquatic organisms is not expected to be significant for the compounds with <TEX>$K_B{\leq}10^5$</TEX> or <TEX>$K_{ow}{\leq}10^6$</TEX>.

keywords
Humic acid, Binging constant, Equilibrium dialysis, log <TEX>$K_{ow}$</TEX>


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