Role of phosphogypsum and NPK amendments on the retention or leaching of metals in different soils

摘要: Column leaching tests were conducted to investigate the effects of soil physicochemical characteristics on metal mobility in subsurface. The metals investigated originated from disposed industrial waste byproducts and agrochemicals spread over farmlands. Soil column can provide insights into underlying water compartments. findings this study be used for prevention strategies setting risk assessment approaches land-use management, quality sustainability. Soils collected an (IS) watershed agricultural (AQ) hydrographic basin experiments. samples characterized mineralogy, functional groups, grain size, surface charge, type, porosity, cation exchange capacity (CEC) along with elemental composition. Varying concentrations phosphogypsum or agrochemical (NPK fertilizer) was then added packed columns (n = 28). subjected artificial rain a period 65 days. Leachates analyzed dissolved Na+, K+, Cd2+ throughout experimental period, whereas residual Cd content subsurface measured at end experiment. Physicochemical characterization indicated that AQ has higher potential retention due its fine clay texture, calcareous pH, high organic matter CEC. Metal release more prominent IS indicating contamination surrounding is attributed characteristics. High calcium origin expected compete adsorbed bivalent elements, such as Cd, resulting their release. receiving media should taken consideration when planning order achieve sustainable development. physiochemical play key role determining behavior fate elements upon application amendments. Sandy soils not assigned zones landfills permeability, unlike soils. Furthermore, fertilizers sandy threaten groundwater quality, extensive use clayey cause salinisation.