engleski

Examination of Water Eluates from Metallurgical Waste

Electric arc furnace dust (EAFD) is a hazardous technological waste that must not be disposed of directly on the ground, therefore it has to be transformed into non-hazardous waste or recycled. Hence, various pyrometallurgical and hydrometallurgical processes of EAFD recycling developed. Although the recycling of this kind of hazardous waste is growing every year, some EAFD is still disposed of directly on the ground. This may endanger and even change the phyisical and chemical characteristics of the ground and ground waters might become contaminated as well.The impact of reaction of waste eluates on the physical and chemical processes in the soil may be of multiple nature. Changed acidic and basic conditions bring about the changes in the concentration of different anions ions which can further cause the sedimentation of some heavy metals, the soil impoverishment, i.e. lack of alkali and especially of some nutritive substances in the soil. Furthermore, soil can become less permeable for water and air, the ground life and plant growth is diminished.Reaction of the water eluates from waste results from its chemical composition. Next to the concentration of substances and their solubility in water, it count as the most important chemical agent in the waste as it influences the mobility of the harmful substances present within the waste and their imact on the environmental system as a whole, especially water and soil. Based on the perviously determined chemical and mineralogical composition of EAFD that was disposed on the ground of the industrial landill, this paper examined the reaction of this waste meterial with distilled water and acid rain in a simulation of natural eluation.

metallurgical waste; water eluates

Uvrstiti: Radovi u zbornicima skupova s međunarodnom recenzijom