• 论文 •

### 我国主要类型土壤Pb的化学形态特征及其分异的探讨

1. 中国科学院地理研究所,北京100101
• 收稿日期:1997-07-10 修回日期:1998-08-25 出版日期:1998-12-15 发布日期:1998-12-15
• 作者简介:罗金发,女,生于1941年10月,研究员,1964年毕业于中山大学化学系。主要从事土壤地理化学研究,尤其对土壤重金属及微址元素的形态及其地域性分异以及其地理化学机理进行了较为深人的研究。主要论著有我国主要类型上壤中Col. As 地带性分异的研究(英文)等30多篇论文,论著4本(合著)。
• 基金资助:

国家自然科学基金资助项目,编号49571004

### THE CHARACTERISTICS AND REGIONAL DIFERENTIATION OF CHEMICAL FORM OF Pb IN MAIN SOIL TYPES IN CHINA

Luo Jinfa, Xia Zenglu, Meng Weiqi

1. Institute of Geography, CAS, Beijing 100101
• Received:1997-07-10 Revised:1998-08-25 Online:1998-12-15 Published:1998-12-15
• Supported by:

Supported by National Natural Science Foundation of China, No.49571004

Abstract: The form of element in soil is determined not only by the characteristics of elements, but also by the condition of regional physical geographical, especially the type and the characteristics of soil. The characteristics of Pb form in 10 main soil types in China show that the relative con-tents of each form of Pb in various soil types is mostly oxide iron-manganese form Pb>carbon-ate or weak conbination form Pb^organic-sulfur compound form Pb>exchange form Pb>solu-tion in water form of Pb. This shows, to a most degree, that the disposition of composition each other form of Pb in various soil type is determined by the chemical properties of Pb element. The relative contents of solution in water form of Pb and exchange form of Pb trend toward de-creases from south to north and from east to west with the order of distribution of soil geograph-ic zone. This shows their characteristics of regional differentiation with the distribution of soil geographic zone. The carbonat form of Pb increases form of Pb that are comparatively difficult to migration in north soil, and the weak combination form of Pb increases form of Pb that are comparatively easy to migration in south soil and east soil. Both of them increase the extent of regional differentiation Pb form or activity of Pb between south and north.The oxide iron-manganese form of Pb also trands toward regional differentiation from south to noth and from east to west, else than laterite that is special cause, only that it don’t increase, but it decreases. The organic-sulfur form of Pb trend toward decreasing from east to west, but it trend toward decreasing only from central setion to north. This is caused by differentiation oforganic contents in various type soils.In all soil, the largest coefficient of differentiation of Pb form is the solution in water formof Pb. exchange form of Pb. and solution in water-I-exchange-j-weak conbination form of Pb. Their coefficient of differentiation change among 1~ 1 places, but the oxide of iron-manganese form of Pb and organic-sulfur form of Pb change only among in unit’s place. Therefore. 3 in front form of Pb is main form of Pb to evaluate regional differentiation of form of Pb in soil.

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