The solubility and availability of Si and Fe released from minerals Release of Si and Fe from different studied minerals by the K-humate ligand was tested in distilled water on the laboratory scale. Three separate flasks each of which contains a 0.5 g of K-humate salt dissolved in 50 mL distilled H2O (1% K-humate solution). Five grams of each mineral was were then added to this solution giving a partial suspension of pH 9.8 without modification. separate flasks each of which contains 1% K-humate solution in dist. H2O. The mixture was shaken at room temperature, left for overnight, and then filtered and the concentration of soluble Si and Fe was measured in the filtrate by Inductively Coupled Plasma Spectrometry (ICP-Ultima 2 JY Plasma).ICP-Atomic Absorption Spectrophotometer (ICP-AAS). Total soluble Si and Fe released from both minerals and in humate solution in (mg) for the studied mineral rates mg was calculated and presented in (Table
The solubility and availability of Si and Fe released from minerals Release of Si and Fe from different studied minerals by the K-humate ligand was tested in distilled water on the laboratory scale. Three separate flasks each of which contains a 0.5 g of K-humate salt dissolved in 50 mL distilled H2O (1% K-humate solution). Five grams of each mineral was were then added to this solution giving a partial suspension of pH 9.8 without modification. separate flasks each of which contains 1% K-humate solution in dist. H2O. The mixture was shaken at room temperature, left for overnight, and then filtered and the concentration of soluble Si and Fe was measured in the filtrate by Inductively Coupled Plasma Spectrometry (ICP-Ultima 2 JY Plasma).ICP-Atomic Absorption Spectrophotometer (ICP-AAS). Total soluble Si and Fe released from both minerals and in humate solution in (mg) for the studied mineral rates mg was calculated and presented in (Table