地理科学进展 ›› 2004, Vol. 23 ›› Issue (1): 51-61.doi: 10.11820/dlkxjz.2004.01.006

• 生态与环境 • 上一篇    下一篇

稀土元素的环境生物地球化学循环研究现状

季宏兵1,2, 王立军2, 董云社2, 王世杰3, 罗建美1, 孙媛媛1   

  1. 1. 首都师范大学地理系资源环境和GIS重点实验室,北京100037;
    2. 中国科学院地理科学与资源研究所,北京100101;
    3. 中国科学院地球化学研究所国家环境地球化学重点实验室,贵阳550002
  • 收稿日期:2003-02-01 修回日期:2003-09-01 出版日期:2004-01-24 发布日期:2004-01-24
  • 作者简介:季宏兵,男,1966年10月出生,博士后,主要从事生物地球化学和元素、同位素地球化学的研究工作。E-mail: hbji@sina.com
  • 基金资助:

    中科院王宽诚博士后工作奖励基金和国家自然科学基金(40243020)共同资助。

An Overview On The Study Of Biogeochemical Cycle For Rare Earth Elements (REEs)

JI Hongbing1,2, WANG Lijun2, DONG Yunshe2, WANG Shijie3, LUO Jianmei1, SUN Yuanyuan1   

  1. 1. Key Laboratory of Resource, Environment and GIS, Department of Geography, Captial Normal University, Beijing 100037;
    2. Institute of Geographical Sciences and Natural Resources Research, Beijing 100101;
    3. The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Guiyang 550002
  • Received:2003-02-01 Revised:2003-09-01 Online:2004-01-24 Published:2004-01-24

摘要:

本文对稀土元素在农用领域的研究进展及其在土壤、水体和植物中的分布、迁移与归宿特征作一系统总结,并对该领域的发展趋势进行了简要的说明。随着自然和人为因素造成的环境中稀土元素的增加,进而产生对生态环境和人类健康的影响,已引起全社会的关注。土壤中稀土元素的存在形态是生态环境效应和生物利用性的的重要参量。目前的实验结果在不同地区和不同土壤剖面中稀土元素的存在形态不尽相同,推测主要与其母质的组成及所处气候等环境条件相关。最近国际上已对稀土元素的水化学过程进行了较广泛的研究,水体中稀土分布受水体的化学参量(如pH, 有机质等)和水化学过程影响,含量高低与人为活动有直接关系。植物中稀土元素的分布通常与土壤中稀土的含量多少相一致,在外施稀土的条件下,在施用后短期内稀土在各器官分布与施用部位密切相关,目前对植物体内稀土元素存在位置和赋存状态的实验结果差别明显,对植物中稀土元素的超富集机理不清等问题尚待进一步探究。

关键词: 生物地球化学, 稀土元素

Abstract:

This paper is a general summary for rare earth elements (REEs) applications in agriculture, the characteristics of their distribution, transport and fate in soils, waters and plants, and concise prospects to the future development in this field. Along with the increase of REEs in the environment, it has caused the concern on our society for the influence on ecological environment and mankind’s health. The solid speciation of REEs in soil horizons is an important parameter to its environmental effects and biological utilizations. However at present the sequential extraction experiment results on the speciation of REEs are varied in different regions and soil profiles, and it is chiefly to be related with environmental conditions, such as the mineral compositions of parent rocks and climate, etc. REE distribution in waters is affected by the environmental parameters (pH and organic matter) and water chemistry processes, the REE contents are also influenced by mankind’s activity. REE distribution in plants is usually identical with that in soils. Under different dressing methods, REE distribution in each organ of plants is closely related with the dressing position after short-term. At present the REEs location and speciation in plants are understood clearly, while the hyper-accumulation mechanism researches for REEs in plants are in doom.

Key words: biogeochemistry, rare earth elements (REEs)