年轮化学示踪环境重金属污染研究进展

ADVANCE IN DENDROCHEMISTRY FOR MONITORING HEAVY METAL POLLUTION IN ENVIRONMENT

年轮化学是利用树木年轮化学组成示踪环境污染历史以及元素在环境中运移特征的新兴学科,已经在反演高分辨率环境污染历史、再现污染物进入植被生态系统的空间途径、重金属污染源示踪,以及环境保护指导等方面取得了重要研究进展。文章概述了年轮化学示踪环境重金属污染基本原理,重金属元素进入树木的基本途径,及其在树轮中的迁移特性;并对树轮重金属元素径向迁移驱动机制提出了假设。

Dendrochemistry is a new subject of study pertaining to the history of environmental pollution and the behavior of elements in environment, based on the chemical compositions in the tree-ring disk. Important advances have been made in several aspects, such as the reconstruction of high-resolution environmental pollution history, the recognition of entries of pollutants into plant ecosystem, the sources of heavy metal pollutants, the utility of dendrochemistry in environment protection, etc. This paper summarizes the basic principles of dendrochemistry for monitoring heavy metal pollution in environment, the entries of heavy metals into trees. and the mobility of heavy metals in tree rings. A hypothesis of the mechanisms of radial movement of heavy metals in tree rings is put forward in the text.