title: Continuous-flow leaching in a rotating coiled column for studies on the mobility of toxic elements in dust samples collected near a metallurgic plant.
abstract: Continuous-flow (dynamic) leaching in a rotating coiled column has been applied to studies on the mobility of Zn, Cd, Cu, Pb, Ni, Sb, As, S, and other potentially toxic elements in atmospherically deposited dust samples collected near a large copper smelter (Chelyabinsk region, Russia). Water and simulated "acid rain" (pH 4) were used as eluents. The technique enables not only the fast and efficient leaching of elements but as well time-resolved studies on the mobilization of heavy metals, sulphur, and arsenic in environmentally relevant forms to be made. It is shown that up to 1.5, 4.1, 1.9, 11.1, and 46.1% of Pb, As, Cu, Zn, and S, correspondingly, can be easily mobilized by water. Taking into consideration that the total concentrations of these elements in the samples under investigation are surprisingly high and vary in the range from 2.7 g/kg (for arsenic) to 15.5 g/kg (for sulphur), the environmental impact of the dust may be dramatic. The simulated acid rain results in somewhat higher recoveries of elements, except Cu and Pb. The proposed approach and the data obtained can very useful for the risk assessment related to the mobility of potentially toxic elements and their inclusion in the biogeochemical cycle.
authors.affiliation: National University of Science and Technology "MISiS", 4 Leninsky Prospect, Moscow 119049, Russia; Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 19 Kosygin Street, Moscow 119991, Russia.
authors.forename: Petr S
authors.initials: PS
authors.lastname: Fedotov
authors.affiliation: National University of Science and Technology "MISiS", 4 Leninsky Prospect, Moscow 119049, Russia; Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 19 Kosygin Street, Moscow 119991, Russia. Electronic address: ermolin@geokhi.ru.
authors.forename: Mikhail S
authors.initials: MS
authors.lastname: Ermolin
authors.affiliation: National University of Science and Technology "MISiS", 4 Leninsky Prospect, Moscow 119049, Russia.
authors.forename: Alexandr I
authors.initials: AI
authors.lastname: Ivaneev
authors.affiliation: National University of Science and Technology "MISiS", 4 Leninsky Prospect, Moscow 119049, Russia.
authors.forename: Natalia N
authors.initials: NN
authors.lastname: Fedyunina
authors.affiliation: National University of Science and Technology "MISiS", 4 Leninsky Prospect, Moscow 119049, Russia; The Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, 6 Institution Street, Chernogolovka 142432, Russia.
authors.forename: Vasily K
authors.initials: VK
authors.lastname: Karandashev
authors.affiliation: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 19 Kosygin Street, Moscow 119991, Russia.
authors.forename: Yury G
authors.initials: YG
authors.lastname: Tatsy
mesh_terms: D015258:Acid Rain; D000393:Air Pollutants / Q000032:analysis*; D001151:Arsenic / Q000032:analysis*; D004391:Dust / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods; D008669:Metallurgy; D019216:Metals, Heavy / Q000032:analysis*; D012426:Russia
chemical_list: D015258:Acid Rain; D000393:Air Pollutants; D004391:Dust; D019216:Metals, Heavy; D001151:Arsenic
keywords: Acid rain; Atmospherically deposited dust; Copper smelter emissions; Dynamic leaching; Rotating coiled column; Toxic elements