您好，欢迎访问湖南省农业科学院 机构知识库！

Input and output of cadmium (Cd) for paddy soil in central south China: fluxes, mass balance, and model predictions

文献类型： 外文期刊

作者： Xie, Yun-He 1 ; Zhu, Jian 2 ; Liu, Sai-Hua 2 ; Pan, Shu-Fang 2 ; Ji, Xiong-Hui 1 ;

作者机构： 1.Cent South Univ, Grad Sch, Longping Branch, Changsha 410125, Peoples R China

2.Hunan Acad Agr Sci, Hunan Inst Agroenvironm & Ecol, Key Lab Prevent Control & Remediat Soil Heavy Met, Changsha 410125, Peoples R China

3.Minist Agr, Key Lab Agrienvironm Midstream Yangtze River Plai, Changsha 410125, Peoples R China

关键词： Cadmium; Input flux; Output flux; Balance; Modeling

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

年卷期：

页码：

收录情况： SCI

摘要： It is important to provide a more comprehensive understanding of cadmium (Cd) input and output in different contamination zones. In this study, we choose 15 sampling areas in three types of contamination zones (industrial and mining, suburb, and rural) to systematically study the inventory of soil Cd input and output in Changzhutan (CZT) urban agglomerations, Hunan Province, China. The results showed that the value of total Cd input in industrial and mining (34.58 g/ha/year) was respectively about 2 and 3 times of that in suburb and in rural. Meanwhile, the total output flux in industrial and mining also presented highest value (38.67 g/ha/year) among the zones. As for the contributions, atmospheric deposition was responsible for 85-89% of the total input fluxes, which was significantly higher than those of irrigation water and fertilizer. Crop harvesting, especially straw removal, was the dominant output pathway, contributing 66-78%. Moreover, Cd annual balance illustrated that the net input fluxes under straw removal scenario were negative in all zones, and it was opposite under straw returning scenario. Further, the changes of soil Cd concentrations under straw returning and straw removal scenario were compared by a dynamic mathematical model. The modeling results presented that the soil Cd content continued to increase under straw returning in 100 years, while it was declining under straw removal scenario. This prediction indicated straw removal was an important remediation for Cd-polluted paddy soil, especially in Hunan. Nevertheless, more treatment measures need to conduct to reach the safety limits in paddy soil.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：湖南省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台