37 uppsatser · sida 2 av 3
… this survey were mostly arsenic and mercury, but also some zinc, copper lead, cadmium and nickel. The two junkyards (object 1 and object 15) and The former scrap collection place (object 13) are the three sites where heavy metals had high concentrations. These objects also have …
… sand worked satisfactory. The highest degree of removal was obtained for lead, cadmium and nickel, for which the removal efficiency exceeded 90% after a load of 300 times the water volume in the columns. For some metals, mainly copper, chromium and mercury the dissolved organic …
… PAH, PCB, aliphatic hydrocarbons, aromatic hydrocarbons, arsenic, lead, cadmium, mercury and zinc were detected over the EPA MCL. The landfill Gräsötippen has a good location in an area with deep clay, which prevents rapid spreading of contaminants. No high levels of …
… their metal content. The blastfurnace waste had very low content of arsenic, cadmium, chrome, cobalt, cupper, lead, mercury, nickel, vanadium and zinc. The amount of arsenic in the clay was moderate. Leaching tests were done on the blast-furnace residues and a very small amount …
… purpose was to increase the precipitation of particles and metals; arsenic, cadmium, chromium, mercury, lead, copper, nickel and zinc through sweep floc coagulation and hydroxide precipitation. After the laboratory tests the precipitation was tested in the treatment plant with …
Bedömning av sulfidmalmgruvan Enåsens eventuella påverkan på sjöns vattenkvalitet
… by a local source. The surface sediments are high in copper, zinc, nickel and cadmium content. The content is high both compared to the samples from deeper in the sediment core and the surface sediments analyzed in the reference study done in 1980. The amounts of heavy metals …
a metal polluted forest soil in Gusum
… the guideline in theworst affected sample point, followed by zinc, lead and cadmium, in thatorder. A pH raising effect caused by the release of metal oxides, that hadpreviously been shown could not be seen and pH on Stångberget was nowsimilar to that of a natural Swedish forest …
en fallstudie i Norrtälje kommun.
… and liquid composts showed that the liquid composts had a much lower level of cadmium content and higher proportion of plant available nutrients. The energy use for these systems varied widely where connection to a large scale wastewater treatment plant have the highest, while …
flöden, trender och fältbalanser
… then how, the situation haschanged. Studied trace elements are arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu),mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb) and zinc (Zn).The balance calculations show that the stores of Cu and Zn are depleted with an average rate …
Sveriges miljömål ”Begränsad klimatpåverkan” beskriver ambitionen att fram till år 2020 ska ha minskat utsläppen av växthusgaser med 40 % gentemot år 1990. Ett sätt för Sverige att lyckas med de uppsatta målen är att utveckla biogasproduktionen. Potentialen för biogasproduktion …
I det svenska samhället tillför diffusa och direkta föroreningskällor metaller till avloppsreningsverk, metaller som sedan hamnar i avloppsslam och recipient. Avloppsslam innehåller höga halter av växtnäringsämnen som bör återföras till jordbruksmark, men om detta ska ske får …
… led to air and water emissions of potentially toxic elements (PTEs), such as cadmium (Cd). Earlier studies have shown that individuals with low iron (Fe) and zinc (Zn) status absorb larger quantities of Cd than those of adequate nutritional status. The purpose of this study was …
Möjligheter att återföra fosforföreningar i avloppsslam till produktiv mark
Gästrike Vatten är ett kommunalägt driftbolag bildat 2008. Bolaget har avloppsreningsverk i Gävle, Hofors, Ockelbo och Älvkarleby kommuner som tillsammans renar avloppsvatten från cirka 120 000 personer. Totalt producerar Gästrike Vatten cirka 11 000 ton slam per år som renderar …
… weak positive correlation occurs between silver and iron in the tetrahedrites. Cadmium was found both in the tetrahedrites and in the sphalerites. Many sphalerites, however, are very pure ZnS. The complex accessory ore mineralogy, including native gold as well as tellurium and …
en litteraturstudie
A literature review of contaminants; cadmium, methylmercury, dioxins, and PCB, for eleven different fish species (Greenland halibut, gilt headed bream, sea bass, wolffish, hoki, ocean perch, angler, Nile perch, pangasius, red snapper and tilapia) that were selected in …
