Dissolution of magnetite and redistribution of heavy metals in urban soils (model experiment) |
| |
| Authors: | Yu N Vodyanitskii |
| |
| Institution: | 1. Faculty of Soil Science, Moscow State University, Moscow, 119991, Russia
|
| |
| Abstract: | Technogenic magnetite in urban soils is extremely various in properties. Its particles strongly differ in magnetic susceptibility and degree of association with heavy metals. In the city of Perm, particles of magnetite enriched with different heavy metals are precipitated, which indicates different sources of technogenic magnetite within the limits of the city. The dissolution of magnetite and the effect of this process on the behavior of heavy metals have been simulated by the magnetochemical method. In strongly magnetic soils, the dissolution of highly magnetic macrocrystalline magnetite is accompanied by the dissolution of heavy metals: Cr, Mn, Ni, Zn, Pb, and Cu. The secondary precipitates of hydroxides of iron and heavy metals (predominantly Pb, Cu, and Ni) are formed relatively rarely, mainly in weakly magnetic soils, where slightly magnetic and dispersed magnetite is present. In cities, the dissolution of magnetite is favored by the added salts and organic acids released by plants. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
