Przedmiotem artykułu jest określenie mobilności pierwiastków ryzyka w próbkach gleby termicznie aktywnego składowiska, będącegoefektem działalności górniczych w regionie Ostrawy. Próbki zostały pobrane ze składowiska Hedvika w okresie 2017–2018. Ekstrakcjaprób gleby została wykonana za pomocą trzystopniowej ekstrakcji sekwencyjnej BCR (Bureau Community of Reference). Ekstrakcjasekwencyjna daje informacje na temat procesów, które normalnie mają miejsce w środowisku. Składnik stały gleby jest stopniowo wypłukiwany w różnych odczynnikach ekstrakcyjnych, począwszy od najsłabszego aż do najsilniejszego. To dostarcza danych na tematogólnej ilości pierwiastków ryzyka obecnych w określonych warunkach środowiskowych. Wybrane pierwiastki ryzyka (Cr, Cu, Ni, Zn)zostały określone za pomocą metody ICP – MS (Inductively plasma mass spectrometry) oraz AAS (atomic absorption spectrometry)(Zn). Wypłukiwanie kwasu azotowego zostało zastosowane aby uzupełnić ogólną analizę ekstrakcji BCR.

Inorganic coagulants, synthetic organic polymers and alternative natural coagulants are used to treat raw water into drinking water and in wastewater treatment. In this experiment, model dairy water and kaolin water were treated with four alternative coagulants. Trigonella foenum-graecum proved to be the best coagulant among the selected alternative coagulants.

Wastewater contains resources, which can be recovered for secondary use if treated properly. Besides research in zero liquid discharge solutions, the aim of the study was a simultaneous recovery of products from a wastewater treatment plant’s dewatering liquor. To be specific, we investigated a simultaneous recovery of struvite and irrigation water using electrodialysis (ED) in laboratory experiments. Two products were obtained from ED—concentrate and diluate. The concentrate was precipitated to obtain struvite. On average, 11 g of wet precipitate (including 17.58% of dry solids) were obtained from 1 L of concentrate. Crystal phases were confirmed by powder X-ray diffraction (XRD), with showing 94–97% recovery of struvite, while the remaining 3–6% were identified as hazenite. The average yield of crystal struvite was 1.76 g. Both struvite and hazenite may further be used as a fertilizer. Next, we suggest using the second ED product, the diluate, as irrigation water if it meets the irrigation water requirements. Attention was paid to the concentrations of dissolved solids (DS) in diluate, which decreased by an average of 93% compared to the input values in the dewatering liquor. In line with the observed Czech or EU standards indicators, we can say that the diluate can be used in agriculture, namely as irrigation water (Category I—water suitable for irrigation).

Polychlorinated substances, polyaromatic hydrocarbons, heavy metals and pesticides are among the priority even at low concentrations. The problem, however, is that such low concentrations are impossible to measure using most available methods. This researchfocused on the determination of selected priority substances – heavy metals, namely lead and cadmium, in which the determination ofPb and Cd in wastewater by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was preceded by water sample pre-treatment.The paper deals with the influence of the pre-treatment on the resulting measured values. Two processes were selected as pre-treatmentprocesses. The first pre-treatment procedure was a simple filtration using a filter paper for moderate filtration. As the second procedure, we applied decomposition of the sample by nitric acid in the open system. The pre-treated wastewater samples were subsequentlyexamined using ICP-MS. Based on the obtained results, we can conclude that decomposition of the sample by nitric acid in the opensystem is a more suitable pre-treatment method for water samples

Heavy metals pose a significant risk to all environmental elements and human health. The danger lies in the fact that they can be toxic even at low concentrations. For this reason, inductively coupled plasma mass spectrometry (ICP-MS) was chosen from all available methods to monitor the concentration of selected heavy metals. In comparison with other methods, very low concentrations of monitored substances (in μg/l) can be determined by ICP-MS. This paper deals with the monitoring of the concentration of selected heavy metals at the inlet and outlet of the municipal wastewater treatment plant, namely lead, cadmium and nickel. The results show that the purification process has a positive effect on the reduction of the concentration of heavy metals in wastewater.