| Abstract [eng] |
The final master thesis deals with the application of an extraction method for the remediation of heavy metal contaminated test soils using chelating compounds of combined and synthetic origin. The first part of the thesis deals with the causes of heavy metals in soil, reviews the different soil remediation technologies, analyses the extraction studies carried out by scientists and the results obtained using chelating compounds and combinations thereof. The second part describes the methodology of the work, the determination of soil parameters (bulk density, pH, organic matter and organic nitrogen content), the preparation of soil samples for experimental studies, the contamination of heavy metals (Cu, Zn, Pb) and the extraction process using EDTMP and NTA and combining them with tartaric acid, at different concentrations and extraction times. Chapter 3 presents the results of the studies and their analysis. The observed reductions in heavy metal concentrations and extraction efficiencies are described, and a comparative analysis of the dependence of the extraction efficiency on the concentration of the combined and synthetic organic chelating compounds and extraction time is presented. In the fourth chapter of the thesis, ANOVA and polynomial regression analysis are performed. The results obtained from the model and experimental studies are presented and analysed. Finally, conclusions and recommendations are presented. The thesis consists of 4 parts: introduction, literature review, experimental methodology, results and analysis, mathematical modelling and analysis of results, conclusions and recommendations, list of references and annex. The thesis consists of 92 pages of text without annexes, 36 illustrations, 17 tables, 137 bibliographical references. |
