利用树木研究持久性有机污染物时空分布特征及其来源综述-《地球科学与环境学报》

文章信息/Info

Title:: Review on Trees for Monitoring the Spatio-temporal Distribution and Sources of Persistent Organic Pollutants

作者:: 王晓艳; 王小萍; 王传飞; 龚平; 1.中国科学院青藏高原研究所中国科学院青藏高原环境变化与地表过程重点实验室，北京 100101；2.中国科学院大学，北京 100049

Author(s):: WANG Xiao-yan; WANG Xiao-ping; WANG Chuan-fei; GONG Ping; 1. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: persistent organic pollutant; tree leaves; tree bark; tree ring; adsorption process; influencing mechanism; spatio-temporal distribution; bark-air partitioning coefficient

摘要:: 持久性有机污染物(POPs)是一类具有半挥发性、持久性和高毒性的化合物，因其对生态系统和人类健康的危害而受到极大关注。树木已被证实是POPs的主要储库之一，树叶、树皮和树轮等是POPs良好的被动采样器，能够较精确地反映出POPs大范围、长时间的污染状况。简要概述了近40年来利用树木研究POPs时空分布特征及其来源的最新进展，指出了树木在偏远及污染水平极低地区进行POPs时空分布监测上的优势；就树叶、树皮以及树轮对POPs的吸附过程和机理进行了讨论，树木对POPs的吸附主要依赖于脂质以及表面气孔，并受树木特性及气候条件的影响，但目前这种影响机制并不明确；针对树木在POPs时空分布监测中的应用进行了总结，可通过树皮-大气分配系数来反演大气中POPs污染水平，同时通过对比发现，相较于湖芯记录，树木样品具有更准确的历史记录特征；最后，分析了目前研究存在的不足，并对未来可能的发展趋势进行了展望。

Abstract:: Persistent organic pollutants (POPs) are a class of persistent, semi-volatile compounds. Their toxic and bioaccumulative properties can severely impair human health and ecosystem. Trees have been proved to be one of the main reservoirs of POPs and have advantages in POPs monitoring in remote and extremely polluted areas. Tree leaves, barks and rings are good passive sampler of POPs, which can well reflect the spatio-temporal distribution of POPs. The study on trees for monitoring the spatio-temporal distribution and sources of POPs in the past 40 years was briefly reviewed; the adsorption process and mechanism of POPs by tree leaves, barks and rings were discussed; and the application of trees in POPs spatio-temporal monitoring was summarized. The advantage of tree is to monitor the spatio-temporal distribution of POPs in remote area or lowest pollution level. The adsorption of POPs by trees mainly depends on lipids and surface stomata, and is affected by tree characteristics and climatic conditions. However, the mechanism is not clear at present. The pollution level of POPs in the atmosphere can be retrieved by bark-air partitioning coefficient. Compared with lake core records, the tree samples have more accurate historical records. Finally, the shortcomings of current research were analyzed, and the possible future trend was put forward to.