Algal Settlement Inactivates Lanthanum/Aluminum Comodified Attapulgite: Implications for Phosphorus Control in Shallow Lakes

Phosphorus (P) inactivation agents have been widely used to control sediment P release for combating lake eutrophication. The settlement and decomposition of algal biomass from the overlying water can alter microenvironment capping layer potentially affect performance agents. In this study, we explored impacts on lanthanum/aluminum comodified attapulgite (LAA), a commonly agent, underlying mechanisms through incubation experiments. results showed that could inactivate LAA. After settlement, amount locked in LAA decreased by 11.8% relative control. Algal induced anoxia LAA, which favored growth phosphate-solubilizing bacteria, thereby enhancing release; meanwhile, driven decomposition, more organic matter penetrated competed with adsorption sites. increased desorption ability inhibited increasing permeability layer. This study provides beneficial information future field applications restoration.