Bodnár , IldikóAlTantawi , Abdulrahman2025-06-162025-06-162025-06-04https://hdl.handle.net/2437/391870The use of Natural Materials to recover nutrients from synthetic greywater (SGW) can offer a more environmentally sustainable alternative to conventional fertilizers. In this work, the nutrient recovery efficiencies of Jordanian Natural Zeolite (JNZ) and Calcium Bentonite (Ca-B) were evaluated through a comparative study on Total Nitrogen (TN) and Total Phosphorus (TP) removal from SGW prepared in the lab. Nutrient-enriched zeolite (NEJZ) and bentonite (NEB) were then applied in a soil-plant system to assess their potential use as slow-release fertilizers. The adsorption capacities of JNZ and Ca-B were determined at fixed doses of 30 and 50 gL-1respectively, and test conditions were maintained constant. Nutrient removal was measured using colorimetric methods after digestion of the samples (TNb and molybdenum blue methods). Effluent quality was compared with previous studies and shown to remain within realistic greywater characteristics (e.g. pH: 8.2±0.2, TN: 17–46 mgL-1, TP: 0.80–4.5 mgL-1). Elemental analysis of the materials before and after enrichment was conducted by SEM-EDS, while phosphorus content in dry biomass was measured to estimate uptake efficiency. Results showed that both materials recovered nutrients effectively, but enrichment with Ca-B generally resulted in higher P content in plant tissue. Plant growth tests were performed using sandy soil mixed with NEJZ and NEB at three different doses (5, 10, and 15 g), along with control samples. A total of 16 pots were cultivated using a shade-tolerant grass seed mix. Visual assessment and elemental analysis of the harvested biomass showed better early performance with bentonite, but healthier growth and higher total uptake at the highest zeolite dose. Based on this, both materials show potential for soil improvement, but dosing and material behavior over time should be carefully considered when selecting the most suitable amendment.78enGreywater, Zeolite, Bentonite, Nutrient Recovery, Adsorption, Agriculture, Plant CultivationEnvironmental ScienceHozzáférhető a 2022 decemberi felsőoktatási törvénymódosítás értelmében.