| dc.creator | Windmoller, CC | |
| dc.creator | Wilken, RD | |
| dc.creator | Jardim, WD | |
| dc.date | 1996 | |
| dc.date | JUN | |
| dc.date | 2014-12-16T11:32:01Z | |
| dc.date | 2015-11-26T17:50:19Z | |
| dc.date | 2014-12-16T11:32:01Z | |
| dc.date | 2015-11-26T17:50:19Z | |
| dc.date.accessioned | 2018-03-29T00:33:31Z | |
| dc.date.available | 2018-03-29T00:33:31Z | |
| dc.identifier | Water Air And Soil Pollution. Kluwer Academic Publ, v. 89, n. 41732, n. 399, n. 416, 1996. | |
| dc.identifier | 0049-6979 | |
| dc.identifier | WOS:A1996UT88100012 | |
| dc.identifier | 10.1007/BF00171644 | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53609 | |
| dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/53609 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/53609 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1289645 | |
| dc.description | Thermal release analysis of mercury species in contaminated soils was performed by temperature controlled continuous heating of the samples in a furnace coupled to an Atomic Absorption Spectrophotometer (AAS). It was shown that this method allows the identification of different redox states of Hg-species through their characteristic releasing temperature ranges. The method was applied to Hg-contaminated samples from an inactive chlor-alkali production plant in former East Germany (GER), and from a gold mining area in Pocone, Mate Grosso, Brazil (BRA), as well as synthetic soil samples obtained by spiking pre-heated soil matrices (GER and BRA) with the following mercury species: Hg-0, Hg2Cl2, HgCl2, HgO and HgS. The samples GER, in general, frequently showed the presence of Hg2+ probably bound to humic substances, in the case of samples with higher total carbon content. Only in highly contaminated samples (>3000 ppm of mercury) was HgO the predominant species. The samples BRA more frequently showed the presence of mercury species in the lower oxidation states, i.e. Hg1+ in combination with Hg-0. The method allows observing changes in Hg-speciation in the samples with time, mainly changes among the oxidation states Hg-0, Hg1+ and Hg2+. The treated GER matrix showed a stronger tendency to oxidise Hg-species than the BRA treated matrix, in which only added HgO is partially oxidised to Hg1+ and Hg2+. In contrast, the BRA matrix showed a pronounced tendency to reduce spiked Hg2+ to Hg1+. This may be the reason for the presence of Hg1+ in the majority of original BRA samples. The method appears to be very useful to study speciation of mercury and its dynamics. It can be used as a tool for monitoring mercury oxidation states and/or reactions of mercury in soils. | |
| dc.description | 89 | |
| dc.description | 41732 | |
| dc.description | 399 | |
| dc.description | 416 | |
| dc.language | en | |
| dc.publisher | Kluwer Academic Publ | |
| dc.publisher | Dordrecht | |
| dc.publisher | Holanda | |
| dc.relation | Water Air And Soil Pollution | |
| dc.relation | Water Air Soil Pollut. | |
| dc.rights | fechado | |
| dc.source | Web of Science | |
| dc.subject | mercury speciation | |
| dc.subject | soil | |
| dc.subject | thermal release analysis | |
| dc.title | Mercury speciation in contaminated soils by thermal release analysis | |
| dc.type | Artículos de revistas | |
