城市地表灰尘颗粒体积分形特征及其吸附性  

Volume fractal characteristic and adsorbability in urban surface dust

作　　者：张志明[1] 方凤满[1] 余键[1] 陈文娟[1] 杨丁[1] 

机构地区：[1]安徽师范大学国土资源与旅游学院,安徽芜湖241003

出　　处：《生态环境》2008年第5期1887-1890,共4页Ecology and Environmnet

基　　金：财政部2007-2010中央与地方共建高校特色优势学科--地理学特色优势学科实验室项目;安徽师范大学地表过程与环境响应优秀创新团队建设计划项目;安徽省高校青年教师资助计划项目(2007jq1063zd)

摘　　要：以地表灰尘颗粒分析数据为基础,运用分形模型,分析了芜湖市高新技术开发区地表灰尘颗粒的分维数。结果表明:19个地表灰尘样品的粒径较粗,粒径的平均值多出现在140～230μm之间,峰值多出现在200～400μm之间;分维数为2.5392～2.7408,平均值为2.6657,pH值为7.97～12.36,平均值为10.22,呈较强的碱性。分维数与pH值之间的相关系数r=-0.2210,相关性不明显;地表灰尘分维数对吸附性的影响效果不明显。Base on the data of surface dust particle composition and fractal model, surface dust fractal dimension had been analyzed in the high and new technology development zone in Wuhu. Results show that 19 surface dust samples have coarse particle size, the averages size of these particle are between 140 μm and 230 μm, and the peaks are between 200 μm and 400 μm; surface dust fractal dimensions are between 2.539 2 and 2.740 8 and the average is 2.665 7, there pH values are between 7.97 and 12.36 and the average is 10.22, which assume alkaline. The correlation coefficient of fractal dimension and pH value is r=-0.221 0, which is little relevance, and the influence effect of fractal dimension to adsorbability is not obvious.

关 键 词：城市地表灰尘 分维数 吸附性 芜湖 

分 类 号：X21[环境科学与工程—环境科学] K928.5[历史地理—人文地理学]