关键词: 大气干湿沉降, 沉降通量, 元素, 吉林省西部, 环境测试

Abstract:

The element flux from atmospheric bulk deposition in western Jilin Province was detected, and its possible sources were tracked, so as to examine the main influencing factors of atmospheric environment in western Jilin Province. Point distribution was used to collect 55 points samples from July 2006 to July 2007 with a sampling density of 15/10 000 km²; All measurements were performed in the Changchun Supervision and Inspection Center of Mineral Resources, Ministry of Land and Resources. Factor and enrichment factor analyses were used to assess depositions of elements. Results showed that macro elements such as Al, Ca, Fe, K, Mg, Na, N and C in the air had relatively higher yearly deposition flux than other elements, while the deposition flux for elements in their solid atmospheric form was higher than that of the same elements dissolved in water. The average enrichment factor for each element and factor analysis results (except for Zn) showed that all enrichment factors for the elements in the main factor F₁(which included F, Ni, Mo, Co, Cr, Cu, Mn, Zn, P, Hg, Ca, Fe, and Mg) that influenced atmosphere quality were close to 1 or much less than 1. This indicated that elements in F₁ might mainly come from nature or dust particles produced by sandy soil or rock decay. In the secondary factor F₂(U, Th, Pb, C, As, Al, K, Na, B, and N) of influencing atmospheric quality,the elements U, Th, K and Na, considered to have come from nature, the other elements were considered came from mainly produced by human activities pollution. Over all, every element detected was in the solid form, predominantly existing in the atmospheric bulk deposition; Natural sources or particles produced by sandy soil or rock decay were the primary factors that influenced atmosphere quality, followed by human activities.

Key words: atmospheric bulk deposition, flux, element, western Jilin Province, environmental testing