As answer to European Community politics, in Romania the researches for waste reworking and ecological treatment are developing. The researches are focusing on wood wastes for its recovery in energy purposes. The purpose is the enlargement of superior coal utilization area obtained from Jiu Valley coal field, for increasing the efficiency of heating installations for domestic consumption, concordantly to European and Romanian pollutions regulations. Combined utilization of the fuel composed from wood biomass and Jiu Valley hard coal is in concordance with Kyoto Protocol regulations, regarding the CO 2 emissions reduction. For establishing the processing technology-eco-briquetting-first the set up of operation parameters for obtaining market competitive ecologic fuels is necessary. The trend of briquettes production, by mixing fuel waste with coal, imposes the determination of physical-chemical characteristics of each compound. In this way, through pre-treatment a minimum environment impact of the combustion is ensured. Used as energy raw material, the biomass is considered to be neutral from CO 2 emission point of view. In this way the energy briquetting will be compatible to environment self cleaning capacity.
The paper presents the attempts of acid and alkaline solubilization of the power plant ashes, using different chemical reagents, at different concentrations. Due to the mineralogical content of these ashes, was elaborated a technological flow for the recovery the iron minerals, resulting an ferrous concentrate containing noble metals. For their recovery from ferrous concentrate, were studied properties of gold, silver and platinum, the conclusion being that these chemical elements can be extracted, in economic conditions, with sodium hypochlorite.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.