Distribution of pesticides in the sediment of the small Teufelsweiher pond (southern Germany)

Distributions of polychlorinated biphenyls in the Daliao River estuary of Liaodong Bay, Bohai Sea (China)

“…Studies by Gschwend and Wu (1985) and Zhou et al (2007) suggested that natural colloidal matter has a non-negligible solubility enhancement effect on the distribution of hydrophobic organic contaminants between aqueous and sediment-bound phases. This effect makes a compound appear to be more soluble in water and reduces the total sediment-sorbed amount (Gao et al, 1997). Second, the partitioning of PCBs into TOC or BC in the Daliao River estuary may not have reached equilibrium, resulting in low correlations between PCBs and TOC or BC in sediments.…”

Flood event impact on pesticide transfer in a small agricultural catchment (Montoussé at Auradé, south west France)

“…They are also easily adsorbed by humic and fluvic acids as soon as by lipids and proteins, forming dissolved organic matter (DOM). DOC and TSM are two very widely known parameters to control pesticide concentrations [43,44]. International Journal of Environmental Analytical Chemistry 399…”

Sorption, degradation and mobility of microcystins in Chinese agriculture soils: risk assessment for groundwater protection

“…2, illustrates a significant difference between the leaching behavior of soils A and C, both of which have similar clay contents. There is some evidence that, in the presence of soils, an increase in the concentration of dissolved organic matter results in an increase in the mobility of hydrophilic and of some hydrophobic organic chemicals such as atrazine, 2,4-D and DDT (Gao et al, 1997;Kan and Tomson, 1990;Fitch and Du, 1996). The content of total organic carbon in soil C is nearly two times than that in soil A, therefore the significant differences in leaching behavior between the two soils may be the result of processes such as: the formation of soluble complexes with soil solution components such as dissolved organic matter; or the incomplete interaction of these toxins with the solid state organic or inorganic matter in the soil (Baskaran et al, 1996b).…”