Dissolved organic matter interaction with napropamide and four other nonionic pesticides

Equilibrium dialysis was used to measure the extent of interaction between dissolved organic matter (DOM) and five nonionic pesticides. The association-dissociation of DOM with the relatively polar, nonionic pesticide napropamide [2-(a-naphthoxy)-N,N-diethylpropionamide], was emphasized in this study. A negative linear correlation was found between the log of the solubility and the log of the association coefficient of these five pesticides with dissolved humic acid derived from peat (peat-DHA) (...)