Leachability of Cr(VI) and other metals from asphalt composites with addition of filter dust
The potential use of filter dust in asphalt composites for road construction was investigated. Filter dust contains high concentrations of metals, of which Cr(VI) and Pb are leached with water. Compact and ground asphalt composites with addition of 2% of filter dust by mass were studied. In order to...
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| Veröffentlicht in: | Waste management (Elmsford) 2008-12, Vol.28 (12), p.2667-2674 |
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| container_title | Waste management (Elmsford) |
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| creator | Vahčič, Mitja Milačič, Radmila Mladenovič, Ana Murko, Simona Zuliani, Tea Zupančič, Marija Ščančar, Janez |
| description | The potential use of filter dust in asphalt composites for road construction was investigated. Filter dust contains high concentrations of metals, of which Cr(VI) and Pb are leached with water. Compact and ground asphalt composites with addition of 2% of filter dust by mass were studied. In order to evaluate their environmental impact, leachability tests were performed using water and salt water as leaching agents. The concentrations of Cr(VI) and Pb were determined in leachates over a time period of 182 days. The results indicated that Pb was not leached with leaching agents from asphalt composites. Cr(VI) was also not leached with leaching agents from compact asphalt composites. However, in ground asphalt composites, Cr(VI) was leached with water in concentrations up to 220μgL−1 and in salt water up to 150μgL−1. From the physico-mechanical and environmental aspects, filter dust can be used as a component in asphalt mixtures. |
| doi_str_mv | 10.1016/j.wasman.2008.01.003 |
| format | Article |
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Filter dust contains high concentrations of metals, of which Cr(VI) and Pb are leached with water. Compact and ground asphalt composites with addition of 2% of filter dust by mass were studied. In order to evaluate their environmental impact, leachability tests were performed using water and salt water as leaching agents. The concentrations of Cr(VI) and Pb were determined in leachates over a time period of 182 days. The results indicated that Pb was not leached with leaching agents from asphalt composites. Cr(VI) was also not leached with leaching agents from compact asphalt composites. However, in ground asphalt composites, Cr(VI) was leached with water in concentrations up to 220μgL−1 and in salt water up to 150μgL−1. 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Filter dust contains high concentrations of metals, of which Cr(VI) and Pb are leached with water. Compact and ground asphalt composites with addition of 2% of filter dust by mass were studied. In order to evaluate their environmental impact, leachability tests were performed using water and salt water as leaching agents. The concentrations of Cr(VI) and Pb were determined in leachates over a time period of 182 days. The results indicated that Pb was not leached with leaching agents from asphalt composites. Cr(VI) was also not leached with leaching agents from compact asphalt composites. However, in ground asphalt composites, Cr(VI) was leached with water in concentrations up to 220μgL−1 and in salt water up to 150μgL−1. 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Filter dust contains high concentrations of metals, of which Cr(VI) and Pb are leached with water. Compact and ground asphalt composites with addition of 2% of filter dust by mass were studied. In order to evaluate their environmental impact, leachability tests were performed using water and salt water as leaching agents. The concentrations of Cr(VI) and Pb were determined in leachates over a time period of 182 days. The results indicated that Pb was not leached with leaching agents from asphalt composites. Cr(VI) was also not leached with leaching agents from compact asphalt composites. However, in ground asphalt composites, Cr(VI) was leached with water in concentrations up to 220μgL−1 and in salt water up to 150μgL−1. From the physico-mechanical and environmental aspects, filter dust can be used as a component in asphalt mixtures.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><pmid>18308534</pmid><doi>10.1016/j.wasman.2008.01.003</doi><tpages>8</tpages></addata></record> |
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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Applied sciences Chromium - chemistry Construction Materials - analysis Dust - analysis Exact sciences and technology Filtration Hydrocarbons - chemistry Other wastes and particular components of wastes Pollution Solubility Time Factors Wastes Water Pollutants, Chemical |
| title | Leachability of Cr(VI) and other metals from asphalt composites with addition of filter dust |
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