摘要
对北京市玉渊潭景观水体7种粒径的底泥颗粒的大孔、中微孔特征及元素组成进行了分析。结果表明,这些沉积颗粒物比表面积较低,孔隙结构不发达。筛分粒径为160 μm和200 μm的颗粒物大孔数量最高,筛分粒径为300um和61μm的颗粒物中、微孔数量较高。此外,相关分析结果显示,底泥沉积物金属元素中Al、Cu、Zn、Ni、Co质量比与平均粒径之间、Fe与Al之间、TOC与烧失量(LOI)之间以及TOC与TN之间均存在线性相关关系。
The paper is concerned about our analysis and discussion of the pore structure and elemental composition of the sediments with seven different sizes collected from the landscape water-bodies in Beijing Yuyuantan Park. The results of our analysis show that such sediments possess smaller specific surface areas and less-developed pore structures. The volumes of such macropores usually are in the range of 0.68 cm^3/g and 1.03 cm^3/g, while those of mesopores and micropores are approximately from 0.028 cm^3/g to 0.031 cm^3/g. Through mercury perosimetry, the maximum value of their specific surface areas can be observed in the sediments with sieving diameter of 150 μm which are actually larger than those in sediments with sieving diameter of 300 μm if measured by N2 adsorption-desorption method. Moreover, both sediments with sieving diameter of 160 μm and 200 μm prove to have largest number of macro-pores, which can be shown in the sediments with sieving diameter of 61 μm and 300 μm. In the light of organic components of sediments, it is found that there exist highly valuable TOC, LOI and DOC in the sediments with their average diameters from 55.8μm to 28.95 μm than in the others. However, such sediments were found to exist the lowest content of Fe and Al, though much higher content of Cu, Zn, Ni, and Co with the average diameter of 114.65 μm than in other sediments. As to the nutritious elements, it was found that they contain least TN and average diameter of TP, that is, 26.90 μm in the sediments. Besides, canonical correlation analysis results demonstrated that linear correlation was observed between the metal content of Al, Cu, Zn, Ni, Co and size, Fe and Al, TOC and LOI, TOC and TN in average content of particle in these sediment particles. And the corresponding coefficients of the above linear correlations were - 0. 842, 0.857, 0.878, 0.94, 0.961, 0.931, 0.832 and 0.875 respectively.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2010年第3期25-29,共5页
Journal of Safety and Environment
基金
水体污染控制与治理科技重大专项课题(2008ZX07422-002-004)
国家自然科学基金项目(20977008)
关键词
环境科学技术这科
底泥颗粒物
粒度
孔结构
组成
相关分析
： basic disciplines of environmental science and technology
sediments
particle size
pore structure
composition
canonical correlation analysis
