- P-ISSN 1225-0163
- E-ISSN 2288-8985
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>.