我国热带和南亚热带一些土壤中汞分布特征的初步研究

本文报导我国热带和南亚热带一些土壤中汞的分析结果,并讨论了土壤中汞的含量水平,汞在土壤剖面中以及在景观地球化学系列各单元景观土壤中的分布特征。

A PRELIMINARY STUDY ON THE DISTRIBUTION CHARACTERISTICS OF MERCURY IN SOME TRO-PICAL AND SOUTH-SUBTROPICAL SOILS OF CHINA

The level and distribution status of mercury in some soils of the Tropics and South-subtropics in China were described in this paper. The results obtained may be summarized as follows.1.The distribution frequency of mercury content in the soils studied is a lognomal one.The geometric mean is a value of 100 ppb,2.The accumulation of mercury was observed in the topsoil and the content of mercury decreases with the depth of the profile. The level of mercury in underlying igneous rocks is lower than that of each soil sample derived from them.3.The mercury content of these soils increases with the content of organic matter.4.All of the topsoils contain a little methylmercury, the level relates to the content of the total mercury in sample.5.The contents of mercury in the landscapes of geochemistry are as follows: The soil derived from superagual landscape>eluvial landscape>tran-seluvial landscape.