Can Organic Matter from Waste-Derived Amendments Limit Phosphorus Losses from Soil to the Aquatic Environment?

When introducing innovative waste-derived amendments, their potential impact on soil retention capacity towards phosphorus (P) should be accounted for to limit its losses and thus water eutrophication. The study was aimed at evaluating P sorption properties of organic amendments conifer woodchip biochar (BIO) brown coal waste (BCW), assessing in five years after application terms limiting from soils the sources. In batch tests samples sandy acid (Haplic Luvisol) were exposed 24 h balancing solutions with a different content, respectively 0–80 mg L−1 0–20 soil. Three treatments studied: (1) (BIO, (2) (BCW) (0) without amendment (control). Organic applied rate equivalent 10.2 t C ha−1 once start trial they amounted 24.2 BCW 12.8 BIO. Based results bath Langmuir Freundlich equations, parameters determined BIO, application. maximum capacities (Smax) BIO 832.3 250.4 kg−1, respectively, controlled mainly by surfaces structures. Within range concentrations used (5–20 L−1), generally higher unfertilized compared amended significantly (p < 0.05) decreased Smax (17%), while bonding energy (k) 15% untreated content dissolved increased case both applications, which may indicate an increase susceptibility losses. However, effectiveness these use other doses climatic conditions cannot excluded. Further research is recommended better understand effect feedstock temperature production retention/losses various types soils.