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Author Milacic, Radmila ♦ Zuliani, Tea ♦ Oblak, Tina ♦ Mladenovic, Ana ♦ Ancar, Janez Sc
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher American Society of Agronomy
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Social sciences ♦ Social problems & services; associations ♦ Social welfare problems & services ♦ Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Biochemistry ♦ Technology ♦ Medicine & health ♦ Human physiology ♦ Personal health & safety ♦ Pharmacology and therapeutics ♦ Diseases ♦ Agriculture & related technologies ♦ Techniques, equipment & materials
Subject Domain (in MeSH) Inorganic Chemicals ♦ Organic Chemicals ♦ Complex Mixtures ♦ Chemical Actions and Uses ♦ Chemicals and Drugs ♦ Chemical Phenomena ♦ Biological Sciences ♦ Technology, Industry, and Agriculture ♦ Technology and Food and Beverages ♦ Environment and Public Health ♦ Health Care
Subject Keyword Discipline Environmental Health ♦ Environmental Monitoring ♦ Hydrocarbons ♦ Analysis ♦ Industrial Waste ♦ Steel ♦ Water Pollutants, Chemical ♦ Chromium ♦ Chemistry ♦ Construction Materials ♦ Hydrogen-ion Concentration ♦ Journal Article ♦ Research Support, Non-u.s. Gov't
Abstract Electric arc furnace (EAF) steel slag can be used as an alternative high-quality material in road construction. Although asphalts with slag aggregates have been recognized as environmentally acceptable, there is a lack of data concerning the potential leaching of toxic Cr(VI) due to the highly alkaline media of EAF slag. Leaching of selected water extractable metals from slag indicated elevated concentrations of total chromium and Cr(VI). To estimate the environmental impacts of asphalt mixes with slag, leachability tests based on diffusion were performed using pure water and salt water as leaching agents. Compact and ground asphalt composites with natural aggregates, and asphalt composites in which the natural aggregates were completely replaced by slag were prepared. The concentrations of total chromium and Cr(VI) were determined in leachates over a time period of 6 mo. After 1 and 6 mo, the concentrations of some other metals were also determined in the leachates. The results indicated that chromium in leachates from asphalt composites with the addition of slag was present almost solely in its hexavalent form. However, the concentrations were very low (below 25 µg L) and did not represent an environmental burden. The leaching of other metals from asphalt composites with the addition of slag was negligible. Therefore, the investigated EAF slag can be considered as environmentally safe substitute for natural aggregates in asphalt mixes.
Description Country affiliation: Slovenia
Author Affiliation: Milacic R ( Department of Environmental Sciences, Jozef Stefan Institute, Ljubljana, Slovenia.
ISSN 00472425
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2011-07-01
Publisher Place United States
e-ISSN 15372537
Journal Journal of Environment Quality
Volume Number 40
Issue Number 4

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Source: WHO-Global Index Medicus