Investigations of n-dodecane used in flotation of copper ore from the Legnica-Glogow Copper Basin (LGOM) were presented in the paper. The aim of the work was estimation of influence of nonpolar reagent's on the results of copper ore flotation. Two series of flotation tests were conducted. The first series - flotation experiments with standard flotation with xanthate collector only (KEtX), were compared with the second series: flotation experiments with n-dodecane addition (C12) in the first stage and then xanthate addition (KEtX). n-dodecane was used in form of aqueous emulsion and frother was aqueous solution of \alfa-terpincol. Flotation results showed that a part of copper minerals float with n-dodecane, and the rest of them is recovered using xanthate collector. The best results were obtained for the first series (with xanthate only). These flotation results were compared with the results of copper sulphide ores flotation with n-heptane addition. It was found that with the doses reagent used, n-heptane has a higher selectivity in comparison with n-dodecane. In the presence of various doses of n-heptane, tested material enriched better in organic carbon carriers than in the copper minerals.

Biogas plants processing municipal waste are very important investments from the point of view of waste management and also the sustainable development of urban infrastructures. They may also have a potentially negative impact on the environment in the form of odour emission. Olfactometry is the main method for odour impact assessment. Field olfactometry allows for performing a wide range of tests, the results of which are practically instantaneous. The purpose of this work is to provide a tool for assessing the odour impacts of municipal management facilities, including biogas plants processing municipal waste and evaluating the correctness of processes carried out in these plants, namely the method of field olfactometry. In order to compare obtained olfactometric results with the concentration of chemical compounds, chromatographic tests were also carried out using the Photovac Voyager portable chromatograph (hydrogen sulphide – H2S and dimethyl sulphide – (CH3)2S. The results of the odour concentration tests are in line with the results of odorant concentration tests and indicate that cod is strongly related to the concentration of hydrogen sulphide. Thanks to this method, it is possible to find a relationship between odour nuisance, technological processes used in the plant and the type of treated waste.

The general area of understanding is inclusions in steel both metallic and nonmetallic in nature. This work has also used the concepts of inclusions in steel in general other than Ti however mainly the research works done on precipitation, solute segregation, grain developments and equilibrium aspects of important inclusions like Ti in steel have been probed. Interaction of inclusions with slag oxides has also been incorporated. Interdependence of elements common in-between many inclusions has been marked. TiN, TixOy and MnS inclusions have been very outstanding in the confines of present research. Ratios and effective concentration have been highlighted in certain cases around the topic. Type of steels, compositions of the constituent elements and temperature correlation has been spotted in certain environments. A suggestive relation with the steel properties has also been inferred. Hardness, corrosion behaviour and strength stand out to be the parameters of vital importance when considering Ti inclusions in the form of either TiN or TixOy. Certain inclusions like MnS seem to nucleate on TiN inclusions and there is a correlation evident certainly in case of complex alloys.

Twenty silver minerals of the sulphide, arsenide, selenide, telluride, sulphosalt and chloride groups were found in 13 locations in the Variscan Karkonosze granitoid pluton. Previously only one of these minerals was known from this area. The findings include species characterized in publications as rare or exceptionally rare, e.g., muthmannite and tsnigriite. They occur in pegmatites and quartz veins; their parageneses are described. The studies include determination of chemical compositions, formulae calculations and recording of XRD patterns. Inclusion studies in paragenetic quartz indicate that they crystallized from epithermal fluids with a common but low component of CO ₂. The results suggest that the minerals formed from trace elements (Ag included) in the Karkonosze granitoid due to very local degrees of recrystallization of the host granitoid.

Animal production is a major source of environmental pollutants, so it is becoming crucial to search for new methods to reduce their release while maintaining animal welfare. The aim of the study was to apply natural additives to rabbit manure in ex situ conditions to reduce the volume of released gaseous pollutants like ammonia (NH₃), methane (CH₄) and hydrogen sulphide (H₂S). The study was carried out in two stages, each with a control group and five experimental groups with additives, natural sorbents (zeolite, bentonite biochar, perlite, mixtures in various proportions of zeolite, biochar and bentonite as well as perlite and biochar) or dried plants containing saponins (Tribulus terrestris and Lysimachia nummularia). Pollutants from each group were measured continuously for one month. In stage 1, both in the case of NH₃ and CH₄, statistically significant differences were observed between the tested groups. The use of sorbent mix and Tribulus terrestris was shown to reduce the release of both NH₃ (by 80% and 83%, respectively) and CH₄ (by 17% and 25%, respectively). The greatest reduction of NH3 in stage 2 was achieved when perlite with the addition of biochar was used (56%), and CH₄ was achieved when Bacillus azotofixans sp. nov. bacteria were used (38%).