Adsorption and Desorption of Carbendazim and Thiamethoxam in Five Different Agricultural Soils

Behaviour of neonicotinoids in contrasting soils

“…Morevoer, their low affinity for soil mineral matrix promotes their leaching via advection or bulk flow during the partial equilibrium condition created by rain storm (Radolinski et al, 2018). Several studies have been carried out on the sorption and leaching of neonicotinoids in soils across many countries such as China (Zhang et al, 2018, Han et al, 2019, US (Papiernik et al, 2006, Spain (Rodríguez-Liébana et al, 2018), Austria (Kah et al, 2018) but these studies were focused on imidacloprid and thiamethoxam and knowledge is needed from the ubiquitous thiacloprid (Yi et al, 2019).. The breakthrough curves for leaching of the two insecticides, most and least adsorbed, through soil with the least and most %SOC are shown in Figure 5.…”

Organic carbon nature determines the capacity of organic amendments to adsorb pesticides in soil

“…Hence, N-alkyl and O-alkyl groups had an important role in the irreversible immobilization of CTL and FNC probably due to the interaction of these herbicides with OC by hydrogen bound or by interactions between polar groups. The low loading factors of the hysteresis of TSF in component 1 and 2 suggest that other factors such as pH or clay content controlled its adsorptiondesorption (Han et al, 2019).…”

Biochar in temperate soils: opportunities and challenges

“…Using five different soils (0.58<OM< 5.02%; 5.64<CEC<21. 3 cmol kg -1 ), Han et al (2019) also concluded that the adsorption and desorption processes for carbendazim and thiamethoxam varied largely with soils and are positively correlated to OM and CEC. Liu et al (2018), however, found that this mechanism was too complicated, unclear and therefore more studies are required to elucidate this mechanism.…”