110 uppsatser · sida 2 av 8
Källor till förhöjda halter i slam?
… nutrient recycling. According to REVAQ, the yearly accumulating rate of metals should not exceed 0.2% in soil per year. Silver and bismuth are two metals that do not fulfill this requirement. The silver concentration in sludge decreased during the last decade, however the last …
Toxic metals contaminate soil worldwide and thus serve as sever environmental threat. Therefore the purposes of this study were to investigate in which soil fractions that different heavy metals (Fe, As, Cu, Zn and Pb) could be found in contaminated soils and if it is possible …
biobränslets och askans innehåll av tungmetaller relaterat till markernas geokemi
… biofuels from areas with large metal amounts in the soil contained more heavy metals than other biofuels. Twenty biofuel samples were collected from incoming transports from the woodlands of Jämtland to the heatand power plant in Östersund. The material was dried and sorted into …
undersökning av felkällor och lämplig provbearbetning
X-ray fluorescence (XRF) detection of heavy metals is a cost- and time-effective method for investigation of polluted areas. Compared to laboratory analysis, XRF analysis is limited by high detection limits and uncertainties in some situations. Preparation of samples is known to …
… of the pollution and compared to sulphide mines there are relatively few heavy metals. The heavy metals found at the contaminated sites in this survey were mostly arsenic and mercury, but also some zinc, copper lead, cadmium and nickel. The two junkyards (object 1 and object 15) …
… of the pollution and compared to sulphide mines there are relatively few heavy metals. The heavy metals found at the contaminated sites in this survey were mostly arsenic and mercury, but also some zinc, copper lead, cadmium and nickel. The two junkyards (object 1 and object 15) …
provtagning, analys och förslag till åtgärder
… presently considered as an oligotrophic lake, which is contaminated with heavy metals. The main purpose of the present study was to investigate possible remediation measures for reducing heavy metal leakage, based on the results of chemical analyses. The specific purposes were …
Svenska gruvbolags riskhantering av en eventuell framtida metallbrist
… has been a subject for quite some time is whether there will be a scarcity of metals in the bedrock in the future and whether or not we might end up with a problem similar to that of the big oil crisis in the mid-seventies. Following the oil crisis many oil companies started up …
… run-off from surfaces such as roads or rooftops is often polluted with heavy metals and nutrients. Many of these substances can cause great damage in biota if they end up in the recipient. In Sweden constructed wetlands and ponds for treatment of stormwater are frequently used …
… REVAQ-certificate. The objective of this project was to map the flow of heavy metals to the wastewater treatment plant. To locate the origin of the hazardous substances in Uppsala and to compare the results with a study done 1989, the flow of hazardous substances in the sewage …
Investigation of bondning mechanisms at the pressing of metal laminates
… steel and for the factors that form the basis for a bond to develop between metals in the production of laminates by pressing. The merge has been done by pressing and the surfaces after the experiments have been studied in detail in the scanning electron microscope (SEM), energy …
en utredning om utsläpp av fenolföreningar samt metallsorption
… bark as a filter material. Another assignment is to investigate the amount of metals adsorbed by the filter material. The studies were carried out through three leaching experiments. As leachates, double deionised water and storm water were used. The phenol concentration in the …
… 50 000 tonnes are incinerated at the plant. Levels of airborne particles, metals present in the airborne particles, volatile organic compounds (VOC), and phosphine were measured in the air. Analysis of the bottom ash water including: pH, total phosphorus, ammonium, chemical …
… involved soil and groundwater sampling, together with the analysis of heavy metals and organic contaminants. The degree of hazard posed by the contaminants, the level of contamination, the potential for migration of the contaminants, as well as the degree to which protection of …
… In the process there is a selective bath where zinc is precipitated on sheet-metals through electrolysis. The problem is that while zinc is precipitated so is nickel and in a much greater extend, about 1 % zinc and 99 % nickel. Husqvarna AB needs a technique to increase …
