期刊
ECOLOGICAL INDICATORS
卷 13, 期 1, 页码 178-183出版社
ELSEVIER
DOI: 10.1016/j.ecolind.2011.05.024
关键词
Mercury; Soils; Lichens; Xanthoria parietina; Chlor-alkali; France
资金
- Mercure en Guyane
Atmospheric mercury (Hg) deposition around a mercury cell chlor-alkali plant located near Grenoble, south-east France, was assessed using Hg concentrations in lichens and soils. Hg content in the epiphytic Xanthoria parietina lichen ranged from similar to 0.07 to similar to 2.51 mu g g(-1), and concentrations decreased with increasing distance to the plant, with a contamination radius of similar to 2 km. Soil Hg concentration profiles were consistent with an atmospheric origin, with higher concentrations in the upper part of the profiles. Concentration of Hg in lichens and top soils (0-10 cm depth) as a function of the distance to the chlor-alkali plant exhibited highly similar variations. Using a simple first-order deposition model, mean Hg fallouts for the whole history of chlor-alkali plant are estimated to similar to 36g Hg day(-1) in this area, compatible with values reported for reactive gaseous mercury (RGM) emissions of similar industrial plants. Using literature data on RGM to total Hg emission ratio, we estimate that the plant emitted similar to 650 kg Hg year(-1). Two kilometres away from the plant, Hg content in top soils falls to values of (0.13 +/- 0.07) mu g g(-1) Hg, which is the local anthropogenic geochemical background level, but higher than unperturbed geochemical background found at the bottom of soil profiles (below 40 cm depth) estimated to (0.04 +/- 0.01) mu g g(-1) Hg. The present study evidences that lichens are a pertinent proxy for soil Hg contamination around chlor-alkali plants. They are attractive bioinonitoring tools since sampling and preparations protocols for lichens are less time consuming than those used for soils. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据