The influence of fly ash on pesticide fate in the environment. ii. hydrolysis, degradation and adsorption of Atrazine in aqueous mixtures of soils with fly ash

The hydrolysis, degradation and adsorption of herbicide atrazine were measured in two soil aquatic suspensions and in their mixtures with fly ash in small amounts (0.1–0.5%) and for concentration range of atrazine 1–14 μg ml‐1. An addition of fly ash up to 0.5% in a Sandy Clay Loam (SCL) soil results in an increase in herbicide degradation by 13.3 % on the average, and a decrease in adsorption by 7.3 %. The same amount of fly ash in the Clay (C) soil increases the atrazine degradation by 9.0% while decreases the adsorption by 6.5% on the average. Therefore the fly ash addition in soils might contribute in their detoxification from atrazine residues.