Naslov
Ispitivanje vodenih eluata otpada crne metalurgije
(Examination of water eluates from metallurgical waste)

Autori
Sofilić, Tahir ; Rastovčan-Mioč, Alenka ; Cerjan-Stefanović, Štefica ; Mioč, Boro

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the 1st International Symposium on Environmental Management / Koprivanac, Natalija - Zagreb : Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, 2003

ISBN
9536470160

Skup
International Symposium on Environmental Management (1 ; 2003)

Mjesto i datum
Zagreb, Hrvatska, 01.10.2003. - 03.10.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
metalurški otpad; prašina; troska; eluati
(metallurgical wastw; dust; slag; eluates)

Sažetak
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 physical 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 OH-, CO32-, S2- 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 counts as the most important chemical agent in the waste as it influences the mobility of the harmful substances present within the waste and their impact on the environmental system as a whole, especially water and soil. Based on the previously determined chemical and mineralogical composition of EAFD that was disposed on the ground of the industrial landfill, this paper examined the reaction of this waste material with distilled water and acid rain in a simulation of natural eluation.

Izvorni jezik
Engleski

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