Dynamics of nutrient elements and potentially toxic elements during composting with different organic wastes

The presence and bioavailability of potentially toxic elements in the soil–plant system are major limitations to application compost agricultural soils. In this study, content changes nutrients four organic wastes, namely household waste, sewage sludge, chicken manure, cow/sheep were analyzed during composting, quality products was assessed view their impact on environment. objective study determine evolution 21 metal elements, including macroelements (Na, K, Ca, Mg), microelements (Fe, Mn, Zn, Cu, Mo, Ni), (Ti, Al, Cr, Cd, Pb, Sb, Li, Co, Be, In, Sn) composting. Results showed that contents these varied considerably between different wastes. some Fe, Ti, Cu) increased substantially after composting due matter decomposition weight loss, whereas other (Mg, In) decreased water leaching. obtained characterized by heavy not exceeding permissible limits. Principal component analysis (PCA) carried out further analyze relationships studied waste products. PCA results revealed Mg) negatively correlated with PC1, positively PC1. From PCA, it possible classify