摘要
在汞的生物地球化学循环中,对于"源"和"汇"的认识还存在许多不确定性。大气汞收支不平衡的问题使得植被在汞循环中的作用日益凸现;开展植被在大气汞收支中作用的研究有助于为全球汞减排政策的制定提供参考。本文首先概述了植被中汞的来源和影响因素及其与大气汞的源汇关系;进而重点论述了植被参与大气汞收支的主要方式:凋落物沉降、生物质燃烧和植被表面与大气汞的动态交换,并阐述了植被在大气汞污染监测中的应用;最后在总结我国相关研究的基础上展望了未来的发展方向。
There are some uncertainties on the sinks and sources of mercury （Hg） in the Hg biogeochemical scycle.The estimated Hg emissions to the atmosphere are significantly greater than the known sinks,resulting in the mass unbalance for atmospheric Hg.Therefore the role of vegetation in Hg biogeochemical cycle has attracted more and more attentions.The studies of the role of vegetation in atmospheric Hg budgets can provide important information for the global Hg-reduced strategies.In this paper,we briefly review the origination of Hg in vegetation and its controlling factors,as well as the source/sink relationship to atmospheric Hg.Then three main manners involved in the atmospheric Hg budgets were emphasized in detail,including litterfall,biomass burning and bi-directional exchange of Hg between the surfaces of vegetation and atmosphere.In addition,the application of vegetation as biomonitorsof atmospheric Hg pollution was discussed.Finally,the progresses of mercury in vegetationin China were presented and some suggestions on future research were put forward.
出处
《生态毒理学报》
CAS
CSCD
北大核心
2014年第5期843-849,共7页
Asian Journal of Ecotoxicology
基金
国家自然科学基金(41303072)
中国科学院地球环境研究所青年人才项目(Y354011480)
福建省青年科学基金(2013J05063)
环境化学与生态毒理学国家重点实验室开放基金(KF2011-11)
关键词
植被
大气汞收支
交换过程
生物质燃烧
凋落物沉降
vegetation
atmospheric Hg budgets
exchange process
biomass burning
litterfall
