Sorption of Natural Siderophores onto Clinoptilolite-Tuff and Its Controlled-Release Characteristics

Iron deficiency-induced chlorosis is a widespread horti-/agricultural problem that can lead to massive crop failures, especially for plants growing on calcareous soils. The most effective agronomical practice prevent from iron deficiency apply synthetic Fe-(chelate)-fertilizers the soil. Because these compounds are usually not biodegradable and, therefore, may become soil contaminants, efficient and environmentally friendly solutions needed. present study investigates novel approach tackle in using clinoptilolite-tuff as carrier substrate natural Fe-siderophore ‘coprogen’. combination of two substances promises economic ecological potential be used fertilizer failures triggered by micro-nutritional shortages. Sorption release experiments were performed batch column setups order understand binding characteristics; analyses carried out ICP-MS, HPLC, XRD, SEM, respectively. Results show highest sorption capacity coprogen (92.8%) corresponding Fe (90.2%) at pH 4 within 30 min well 8, mimicking alkaline conditions (88% sorbed released tuff). gained data suggest bound onto through surface-mediated based electrostatic interactions.