Risk quick sketch: Soil captured most anatoxin-a and microcystin-RR rather than cylindrospermopsin and microcystin-LA/-LY

Cyanobacteria proliferate in warm, nutrient-rich environments and release toxic secondary metabolites (e.g., cyanotoxins, anabaenopeptins, etc.) into natural waters. Using the toxic secondary metabolites -contaminated water to irrigate crops could expose humans and biota to cyanotoxins, but the risk may be low if agricultural soils can sorb and retain cyanotoxins. In this report, we compared the sorption and desorption capacities of multi-class cyanotoxins/anabaenopeptins in soils of variable properties with a batch sorption procedure. The target compounds were anabaenopeptin-A, anabaenopeptin-B, anatoxin-a, cylindrospermopsin, and microcystins -LR, -RR, -LA, -LY, -LW, and -LF. Based on solid-liquid distribution coefficients (K