气候变化领域集成服务门户(CCPortal): 大气降尘磁学特征对城市污染源的指示

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	大气降尘磁学特征对城市污染源的指示
其他题名	Magnetic Characteristics of Urban Dustfall and the Implications on Pollution Origins
	夏敦胜; 余晔; 马剑英; 刘秀铭; 陈发虎
发表日期	2007
ISSN	1003-7578
卷号	21 期号:12 页码:110-115
中文摘要	本文应用环境磁学方法研究了兰州市区大气自然降尘的磁学特征。结果表明：兰州市大气降尘中磁性矿物含量较高，主要含有磁铁矿和磁赤铁矿，并伴有少量赤铁矿，磁性矿物颗粒较粗，为准单畴颗粒；兰州市自然粉尘背景值较高，但市区污染物仍以人为源为主，尤其在冬季采暖期间最为显著，且在春、夏季节，兰州市的污染仍以人为源为主，与通常认为兰州市污染冬季以燃煤为主，春、夏季以粉尘为主的模式有较大差异。
英文摘要	A set of environmental magnetic parameters （ X_(lf), X_(fd)% , X_(arm) SIRM, HIRM, SOFT and back field IRM） of the monthly -collected dustfall samples, which were collected during 1997.4 -2000.5 and 2004.11-2005.10 at Lanzhou university campus （ KLD and CCS） and at a clear site of Gaolanxian （ GLX）, were analyzed. Results demonstrated that the main magnetic minerals in the dustfall were magnetite and maghaemite with some haematite. Cross plots of Mrs/Ms vs. Bcr/Bc and X_(fd)% vs. Xarm/SIRM indicated that the main magnetic grain sizes in street dust were pseudo single domain （PSD）. The high concentration of magnetic minerals in the dust fall indicated that Lanzhou was serious polluted. The main pollution sources are anthropogenic activities and nature dust. The former poses a great threat during the whole year, which is different from the general opinion that the natural dust is main pollution in summer. The research also revealed that as a simple, rapid and accurate technology, environmental magnetism would be a valuable tool in pollution study.
关键词	环境磁学大气降尘环境污染兰州市
英文关键词	Environmental magnetism;dustfall;urban pollution;Lanzhou
语种	中文
WOS研究方向	Environmental Sciences & Ecology
WOS类目	ENVIRONMENTAL SCIENCES
CSCD记录号	CSCD:3060980
来源期刊	干旱区资源与环境
来源机构	中国科学院寒区旱区环境与工程研究所 ; 兰州大学 ; 中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/1802
推荐引用方式 GB/T 7714	夏敦胜,余晔,马剑英,等. 大气降尘磁学特征对城市污染源的指示[J]. 中国科学院寒区旱区环境与工程研究所, 兰州大学, 中国科学院青藏高原研究所,2007,21(12):110-115.
APA	夏敦胜,余晔,马剑英,刘秀铭,&陈发虎.(2007).大气降尘磁学特征对城市污染源的指示.干旱区资源与环境,21(12),110-115.
MLA	夏敦胜,et al."大气降尘磁学特征对城市污染源的指示".干旱区资源与环境 21.12(2007):110-115.