Nitrate and Dissolved Organic Carbon Release in Sandy Soils at Different Liquid/Solid Ratios Amended with Graphene and Classical Soil Improvers

This study emphasizes the importance of employing parallel batch tests with different liquid/solid (L/S) ratios to assess their dissolution mechanisms. Changes in physicochemical parameters (electrical conductivity, pH, and oxidation-reduction potential), as well sorption/desorption dissolved organic carbon (DOC) nitrate (NO3−) due graphene addition a calcareous sandy soil (CS) siliciclastic riverine (SS) were assessed via experiments at L/S ratios. Graphene’s production is growing great pace, so it’s important test methods reuse wastes. The results mixed compared classical improvers (compost, biochar, zeolites). batches performed using saturation extraction method deionized water proxy rainwater. contact time was 48 h. At end experiment, samples collected be analyzed for NO3−, DOC, DIC, Ca, Mg. Graphene did not alter physiochemical both soils. Moreover, its trigger any NO3− increase respect control other improvers. Biochar increased EC pH beyond recommended limits most crops’ growth As expected, compost produced highest release.