Environment International, 2 ruelle du Hamet, 60129 Orrouy, France.
Environ Sci Technol. 2012 Sep 4;46(17):9541-7. doi: 10.1021/es300318v. Epub 2012 Aug 24.
Trees can take up and assimilate contaminants from the soil, subsurface, and groundwater. Contaminants in the transpiration stream can become bound or incorporated into the annual rings formed in trees of the temperate zones. The chemical analysis of precisely dated tree rings, called dendrochemistry, can be used to interpret past plant interactions with contaminants. This investigation demonstrates that dendrochemistry can be used to generate historical scenarios of past contamination of groundwater by chlorinated solvents at a site in Verl, Germany. Increment cores from trees at the Verl site were collected and analyzed by energy-dispersive X-ray fluorescence (EDXRF) line scanning. The EDXRF profiles showed four to six time periods where tree rings had anomalously high concentrations of chlorine (Cl) as an indicator of potential contamination by chlorinated solvents.
树木可以从土壤、地下水和地下水等中吸收和同化污染物。蒸腾流中的污染物可以与温带地区树木形成的年轮结合或结合。精确标记日期的树木年轮的化学分析称为树木化学，可以用来解释过去植物与污染物的相互作用。这项研究表明，树木化学可以用来生成德国Verl 地区地下水受氯化溶剂污染的历史情景。从 Verl 地点的树木上采集了增量核心，并通过能量色散 X 射线荧光（EDXRF）线扫描进行了分析。EDXRF 图谱显示，树木年轮中氯（Cl）的浓度异常高，表明可能受到氯化溶剂的污染，有四个到六个时间段。
